All Units Ontology Version 2.1.18
This version: 2.1
Latest published version: http://www.QUDT.org/doc/2022/06/DOC_VOCAB-UNITS-ALL-v2.1.html
Previous published version: http://www.qudt.org/doc/2022/04/DOC_VOCAB-UNITS-ALL-v2.1.html
Editor: Ralph Hodgson, TopQuadrant, Inc
Contributors: Jack Hodges, Simon J D Cox, Steve Ray
Last Modified: 2022-06-29T17:41:01.977-04:00
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Abstract
Table of Contents
Imported Graphs
A list of graphs imported by http://qudt.org/2.1/vocab/unit is shown below.
| Graph URI | Intent |
|---|---|
| http://qudt.org/2.1/schema/facade/qudt | |
| http://qudt.org/2.1/vocab/prefix | Provides a vocabulary of prefixes for both human and machine use |
| http://qudt.org/2.1/vocab/quantitykind | TBD |
| http://qudt.org/2.1/vocab/sou | The intent of this graph is the specification of all Systems of Units |
Non-imported Resources
The graph uses 5 resources from other graphs that are not imported, as listed below:
Resource Index
The main namespace for resources in this graph is http://qudt.org/vocab/unit/ with the prefix unit.
Classes
No Classes defined in this graph
Properties
No Properties defined in this graph
Instances
The graph defines, or extends, 1749 instances, as indexed below:
Restricted Datatypes
No restricted datatypes defined in this graph
unit:A
URI: http://qudt.org/vocab/unit/A
The \(\textit{ampere}\), often shortened to \(\textit{amp}\), is the SI unit of electric current and is one of the seven SI base units. \(\text{A}\ \equiv\ \text{amp (or ampere)}\ \equiv\ \frac{\text{C}}{\text{s}}\ \equiv\ \frac{\text{coulomb}}{\text{second}}\ \equiv\ \frac{\text{J}}{\text{Wb}}\ \equiv\ \frac{\text{joule}}{\text{weber}}\) Note that SI supports only the use of symbols and deprecates the use of any abbreviations for units.
unit:A-HR
URI: http://qudt.org/vocab/unit/A-HR
\(\textbf{Ampere hour}\) is a practical unit of electric charge equal to the charge flowing in one hour through a conductor passing one ampere. An ampere-hour or amp-hour (symbol \(Ah,\,AHr,\, A \cdot h, A h\)) is a unit of electric charge, with sub-units milliampere-hour (\(mAh\)) and milliampere second (\(mAs\)). One ampere-hour is equal to 3600 coulombs (ampere-seconds), the electric charge transferred by a steady current of one ampere for one hour. The ampere-hour is frequently used in measurements of electrochemical systems such as electroplating and electrical batteries. The commonly seen milliampere-hour (\(mAh\) or \(mA \cdot h\)) is one-thousandth of an ampere-hour (\(3.6 \,coulombs\)).
unit:A-M2
URI: http://qudt.org/vocab/unit/A-M2
The SI unit of electromagnetic moment.
unit:A-M2-PER-J-SEC
URI: http://qudt.org/vocab/unit/A-M2-PER-J-SEC
The SI unit of gyromagnetic ratio.
unit:A-PER-DEG_C
URI: http://qudt.org/vocab/unit/A-PER-DEG_C
A measure used to express how a current is subject to temperature. Originally used in Wien's Law to describe phenomena related to filaments. One use today is to express how a current generator derates with temperature.
unit:A-PER-J
URI: http://qudt.org/vocab/unit/A-PER-J
The inverse measure of \(joule-per-ampere\) or \(weber\). The measure for the reciprical of magnetic flux.
unit:A-PER-M
URI: http://qudt.org/vocab/unit/A-PER-M
is the SI unit of magnetic field strength. One ampere per meter is equal to \(\pi/250\) oersteds (\(12.566\, 371\,millioersteds\)) in CGS units. The ampere per meter is also the SI unit of "magnetization" in the sense of magnetic dipole moment per unit volume; in this context \(1 A/m = 0.001\,emu\,per\,cubic\,centimeter\).
unit:A-PER-M2
URI: http://qudt.org/vocab/unit/A-PER-M2
\(\textbf{Ampere Per Square Meter}\) is a unit in the category of electric current density. This unit is commonly used in the SI unit system.
unit:A-PER-RAD
URI: http://qudt.org/vocab/unit/A-PER-RAD
\(\textit{Ampere per Radian}\) is a derived unit for measuring the amount of current per unit measure of angle, expressed in ampere per radian.
unit:AC
URI: http://qudt.org/vocab/unit/AC
The acre is a unit of area in a number of different systems, including the imperial and U.S. customary systems. Its international symbol is ac. The most commonly used acres today are the international acre and, in the United States, the survey acre. The most common use of the acre is to measure tracts of land. One international acre is equal to 4046.8564224 square metres.
unit:AC-FT
URI: http://qudt.org/vocab/unit/AC-FT
An acre-foot is a unit of volume commonly used in the United States in reference to large-scale water resources, such as reservoirs, aqueducts, canals, sewer flow capacity, and river flows. It is defined by the volume of one acre of surface area to a depth of one foot. Since the acre is defined as a chain by a furlong (\(66 ft \times 660 ft\)) the acre-foot is exactly \(43,560 cubic feet\). For irrigation water, the volume of \(1 ft \times 1 \; ac = 43,560 \; ft^{3} (1,233.482 \; m^{3}, 325,851 \; US gal)\).
unit:AMU
URI: http://qudt.org/vocab/unit/AMU
The \(\textit{Unified Atomic Mass Unit}\) (symbol: \(\mu\)) or \(\textit{dalton}\) (symbol: Da) is a unit that is used for indicating mass on an atomic or molecular scale. It is defined as one twelfth of the rest mass of an unbound atom of carbon-12 in its nuclear and electronic ground state, and has a value of \(1.660538782(83) \times 10^{-27} kg\). One \(Da\) is approximately equal to the mass of one proton or one neutron. The CIPM have categorised it as a \(\textit{"non-SI unit whose values in SI units must be obtained experimentally"}\).
unit:ANGSTROM
URI: http://qudt.org/vocab/unit/ANGSTROM
The \(Angstr\ddot{o}m\) is an internationally recognized unit of length equal to \(0.1 \,nanometre\) or \(1 \times 10^{-10}\,metres\). Although accepted for use, it is not formally defined within the International System of Units(SI). The angstrom is often used in the natural sciences to express the sizes of atoms, lengths of chemical bonds and the wavelengths of electromagnetic radiation, and in technology for the dimensions of parts of integrated circuits. It is also commonly used in structural biology.
unit:ANGSTROM3
URI: http://qudt.org/vocab/unit/ANGSTROM3
A unit that is a non-SI unit, specifically a CGS unit, of polarizability known informally as polarizability volume. The SI defined units for polarizability are C*m^2/V and can be converted to \(Angstr\ddot{o}m\)^3 by multiplying the SI value by 4 times pi times the vacuum permittivity and then converting the resulting m^3 to \(Angstr\ddot{o}m\)^3 through the SI base 10 conversion (multiplying by 10^-30).
unit:ARCMIN
URI: http://qudt.org/vocab/unit/ARCMIN
A minute of arc, arcminute, or minute arc (MOA), is a unit of angular measurement equal to one sixtieth (1/60) of one degree (circle/21,600), or \(\pi /10,800 radians\). In turn, a second of arc or arcsecond is one sixtieth (1/60) of one minute of arc. Since one degree is defined as one three hundred and sixtieth (1/360) of a rotation, one minute of arc is 1/21,600 of a rotation.
unit:ARCSEC
URI: http://qudt.org/vocab/unit/ARCSEC
"Arc Second" is a unit of angular measure, also called the \(\textit{second of arc}\), equal to \(1/60 \; arcminute\). One arcsecond is a very small angle: there are 1,296,000 in a circle. The SI recommends \(\textit{double prime}\) (\(''\)) as the symbol for the arcsecond. The symbol has become common in astronomy, where very small angles are stated in milliarcseconds (\(mas\)).
unit:ARE
URI: http://qudt.org/vocab/unit/ARE
An 'are' is a unit of area equal to 0.02471 acre and 100 centare.
unit:AT
URI: http://qudt.org/vocab/unit/AT
The \(\textit{ampere-turn}\) was the MKS unit of magnetomotive force (MMF), represented by a direct current of one ampere flowing in a single-turn loop in a vacuum. "Turns" refers to the winding number of an electrical conductor comprising an inductor. The ampere-turn was replaced by the SI unit, \(ampere\).
unit:AT-PER-IN
URI: http://qudt.org/vocab/unit/AT-PER-IN
The \(\textit{Ampere Turn per Inch}\) is a measure of magnetic field intensity and is eual to 12.5664 Oersted.
unit:AT-PER-M
URI: http://qudt.org/vocab/unit/AT-PER-M
The \(\textit{Ampere Turn per Metre}\) is the SI unit of magnetic field strength. One ampere per meter is equal to \(\pi/250\) oersteds (12.566 371 millioersteds) in CGS units. The ampere per meter is also the SI unit of "magnetization" in the sense of magnetic dipole moment per unit volume; in this context \(1 A/m = 0.001 emu per cubic centimeter\).
unit:ATM
URI: http://qudt.org/vocab/unit/ATM
The standard atmosphere (symbol: atm) is an international reference pressure defined as \(101.325 \,kPa\) and formerly used as unit of pressure. For practical purposes it has been replaced by the bar which is \(100 kPa\). The difference of about 1% is not significant for many applications, and is within the error range of common pressure gauges.
unit:ATM-M3-PER-MOL
URI: http://qudt.org/vocab/unit/ATM-M3-PER-MOL
A unit that consists of the power of the SI base unit metre with the exponent 3 multiplied by the unit atmosphere divided by the SI base unit mol.
unit:ATM_T
URI: http://qudt.org/vocab/unit/ATM_T
A technical atmosphere (symbol: at) is a non-SI unit of pressure equal to one kilogram-force per square centimeter. The symbol 'at' clashes with that of the katal (symbol: 'kat'), the SI unit of catalytic activity; a kilotechnical atmosphere would have the symbol 'kat', indistinguishable from the symbol for the katal. It also clashes with that of the non-SI unit, the attotonne, but that unit would be more likely be rendered as the equivalent SI unit. Assay ton (abbreviation 'AT') is not a unit of measurement, but a standard quantity used in assaying ores of precious metals; it is \(29 1D6 \,grams\) (short assay ton) or \(32 2D3 \,grams\) (long assay ton), the amount which bears the same ratio to a milligram as a short or long ton bears to a troy ounce. In other words, the number of milligrams of a particular metal found in a sample of this size gives the number of troy ounces contained in a short or long ton of ore.
unit:AU
URI: http://qudt.org/vocab/unit/AU
An astronomical unit (abbreviated as AU, au, a.u., or ua) is a unit of length equal to \(149,597,870,700 metres\) (\(92,955,807.273 mi\)) or approximately the mean Earth Sun distance.
unit:AUD
URI: http://qudt.org/vocab/unit/AUD
Australia, Australian Antarctic Territory, Christmas Island, Cocos (Keeling) Islands, Heard and McDonald Islands, Kiribati, Nauru, Norfolk Island, Tuvalu
unit:A_Ab-CentiM2
URI: http://qudt.org/vocab/unit/A_Ab-CentiM2
"Abampere Square centimeter" is the unit of magnetic moment in the electromagnetic centimeter-gram-second system.
unit:A_Ab-PER-CentiM2
URI: http://qudt.org/vocab/unit/A_Ab-PER-CentiM2
Abampere Per Square Centimeter (\(aA/cm^2\)) is a unit in the category of Electric current density. It is also known as abamperes per square centimeter, abampere/square centimeter, abampere/square centimetre, abamperes per square centimetre, abampere per square centimetre. This unit is commonly used in the cgs unit system. Abampere Per Square Centimeter (\(aA/cm^2\)) has a dimension of \(L^{-2}I\) where L is length, and I is electric current. It can be converted to the corresponding standard SI unit \(A/m^{2}\) by multiplying its value by a factor of 100000.
unit:A_Stat
URI: http://qudt.org/vocab/unit/A_Stat
"Statampere" (statA) is a unit in the category of Electric current. It is also known as statamperes. This unit is commonly used in the cgs unit system. Statampere (statA) has a dimension of I where I is electric current. It can be converted to the corresponding standard SI unit A by multiplying its value by a factor of 3.355641E-010.
unit:A_Stat-PER-CentiM2
URI: http://qudt.org/vocab/unit/A_Stat-PER-CentiM2
The Statampere per Square Centimeter is a unit of electric current density in the c.g.s. system of units.
unit:B
URI: http://qudt.org/vocab/unit/B
A logarithmic unit of sound pressure equal to 10 decibels (dB), It is defined as: \(1 B = (1/2) \log_{10}(Np)\)
unit:BAN
URI: http://qudt.org/vocab/unit/BAN
A ban is a logarithmic unit which measures information or entropy, based on base 10 logarithms and powers of 10, rather than the powers of 2 and base 2 logarithms which define the bit. One ban is approximately \(3.32 (log_2 10) bits\).
unit:BAR
URI: http://qudt.org/vocab/unit/BAR
The bar is a non-SI unit of pressure, defined by the IUPAC as exactly equal to \(100,000\,Pa\). It is about equal to the atmospheric pressure on Earth at sea level, and since 1982 the IUPAC has recommended that the standard for atmospheric pressure should be harmonized to \(100,000\,Pa = 1 \,bar \approx 750.0616827\, Torr\). Units derived from the bar are the megabar (symbol: Mbar), kilobar (symbol: kbar), decibar (symbol: dbar), centibar (symbol: cbar), and millibar (symbol: mbar or mb). They are not SI or cgs units, but they are accepted for use with the SI.
unit:BARAD
URI: http://qudt.org/vocab/unit/BARAD
A barad is a dyne per square centimetre (\(dyn \cdot cm^{-2}\)), and is equal to \(0.1 Pa \) (\(1 \, micro \, bar\), \(0.000014504 \, p.s.i.\)). Note that this is precisely the microbar, the confusable bar being related in size to the normal atmospheric pressure, at \(100\,dyn \cdot cm^{-2}\). Accordingly barad was not abbreviated, so occurs prefixed as in \(cbarad = centibarad\). Despite being the coherent unit for pressure in c.g.s., barad was probably much less common than the non-coherent bar. Barad is sometimes called \(barye\), a name also used for \(bar\).
unit:BARN
URI: http://qudt.org/vocab/unit/BARN
A barn (symbol b) is a unit of area. Originally used in nuclear physics for expressing the cross sectional area of nuclei and nuclear reactions, today it is used in all fields of high energy physics to express the cross sections of any scattering process, and is best understood as a measure of the probability of interaction between small particles. A barn is defined as \(10^{28} m^2 (100 fm^2)\) and is approximately the cross sectional area of a uranium nucleus. The barn is also the unit of area used in nuclear quadrupole resonance and nuclear magnetic resonance to quantify the interaction of a nucleus with an electric field gradient. While the barn is not an SI unit, it is accepted for use with the SI due to its continued use in particle physics.
unit:BARYE
URI: http://qudt.org/vocab/unit/BARYE
The barye, or sometimes barad, barrie, bary, baryd, baryed, or barie, is the centimetre-gram-second (CGS) unit of pressure. It is equal to 1 dyne per square centimetre.
unit:BBL
URI: http://qudt.org/vocab/unit/BBL
A barrel is one of several units of volume, with dry barrels, fluid barrels (UK beer barrel, U.S. beer barrel), oil barrel, etc. The volume of some barrel units is double others, with various volumes in the range of about 100-200 litres (22-44 imp gal; 26-53 US gal).
unit:BEAT-PER-MIN
URI: http://qudt.org/vocab/unit/BEAT-PER-MIN
"Heart Beat per Minute" is a unit for 'Heart Rate' expressed as \(BPM\).
unit:BIOT
URI: http://qudt.org/vocab/unit/BIOT
"Biot" is another name for the abampere (aA), which is the basic electromagnetic unit of electric current in the emu-cgs (centimeter-gram-second) system of units. It is called after a French physicist, astronomer, and mathematician Jean-Baptiste Biot. One abampere is equal to ten amperes in the SI system of units. One abampere is the current, which produces a force of 2 dyne/cm between two infinitively long parallel wires that are 1 cm apart.
unit:BIT
URI: http://qudt.org/vocab/unit/BIT
In information theory, a bit is the amount of information that, on average, can be stored in a discrete bit. It is thus the amount of information carried by a choice between two equally likely outcomes. One bit corresponds to about 0.693 nats (ln(2)), or 0.301 hartleys (log10(2)).
unit:BIT-PER-SEC
URI: http://qudt.org/vocab/unit/BIT-PER-SEC
A bit per second (B/s) is a unit of data transfer rate equal to 1 bits per second.
unit:BQ
URI: http://qudt.org/vocab/unit/BQ
The SI derived unit of activity, usually meaning radioactivity. "Radioactivity" is caused when atoms disintegrate, ejecting energetic particles. One becquerel is the radiation caused by one disintegration per second; this is equivalent to about 27.0270 picocuries (pCi). The unit is named for a French physicist, Antoine-Henri Becquerel (1852-1908), the discoverer of radioactivity. Note: both the becquerel and the hertz are basically defined as one event per second, yet they measure different things. The hertz is used to measure the rates of events that happen periodically in a fixed and definite cycle. The becquerel is used to measure the rates of events that happen sporadically and unpredictably, not in a definite cycle.
unit:BQ-PER-KiloGM
URI: http://qudt.org/vocab/unit/BQ-PER-KiloGM
The only unit in the category of Specific radioactivity. It is also known as becquerels per kilogram, becquerel/kilogram. This unit is commonly used in the SI unit system. Becquerel Per Kilogram (Bq/kg) has a dimension of \(M{-1}T{-1}\) where \(M\) is mass, and \(T\) is time. It essentially the same as the corresponding standard SI unit \(/kg/s\).
unit:BQ-PER-L
URI: http://qudt.org/vocab/unit/BQ-PER-L
One radioactive disintegration per second from a one part in 10**3 of the SI unit of volume (cubic metre).
unit:BQ-PER-M3
URI: http://qudt.org/vocab/unit/BQ-PER-M3
Becquerel Per Cubic Meter (\(Bq/m3\)) is a unit in the category of Radioactivity concentration. It is also known as becquerels per cubic meter, becquerel per cubic metre, becquerels per cubic metre, becquerel/cubic inch. This unit is commonly used in the SI unit system. Becquerel Per Cubic Meter (Bq/m3) has a dimension of \(L{-3}T{-1}\) where \(L\) is length, and \(T\) is time. It essentially the same as the corresponding standard SI unit \(/s\cdot m{3}\).
unit:BREATH-PER-MIN
URI: http://qudt.org/vocab/unit/BREATH-PER-MIN
A unit of respiratory rate.
unit:BTU_IT
URI: http://qudt.org/vocab/unit/BTU_IT
\(\textit{British Thermal Unit}\) (BTU or Btu) is a traditional unit of energy equal to about \(1.0550558526 \textit{ kilojoule}\). It is approximately the amount of energy needed to heat 1 pound (0.454 kg) of water from \(39 \,^{\circ}{\rm F}\) to \(40 \,^{\circ}{\rm F}\) . The unit is most often used in the power, steam generation, heating and air conditioning industries. In scientific contexts the BTU has largely been replaced by the SI unit of energy, the \(joule\), though it may be used as a measure of agricultural energy production (BTU/kg). It is still used unofficially in metric English-speaking countries (such as Canada), and remains the standard unit of classification for air conditioning units manufactured and sold in many non-English-speaking metric countries.
unit:BTU_IT-FT
URI: http://qudt.org/vocab/unit/BTU_IT-FT
\({\bf BTU_{IT} \, Foot}\) is an Imperial unit for \(\textit{Thermal Energy Length}\) expressed as \(Btu-ft\).
unit:BTU_IT-FT-PER-FT2-HR-DEG_F
URI: http://qudt.org/vocab/unit/BTU_IT-FT-PER-FT2-HR-DEG_F
\(BTU_{IT}\), Foot per Square Foot Hour Degree Fahrenheit is an Imperial unit for 'Thermal Conductivity' expressed as \(Btu_{it} \cdot ft/(hr \cdot ft^2 \cdot degF)\).
unit:BTU_IT-IN
URI: http://qudt.org/vocab/unit/BTU_IT-IN
\({\bf BTU \, Inch}\) is an Imperial unit for 'Thermal Energy Length' expressed as \(Btu-in\).
unit:BTU_IT-IN-PER-FT2-HR-DEG_F
URI: http://qudt.org/vocab/unit/BTU_IT-IN-PER-FT2-HR-DEG_F
\(BTU_{th}\) Inch per Square Foot Hour Degree Fahrenheit is an Imperial unit for 'Thermal Conductivity' expressed as \(Btu_{it}-in/(hr-ft^{2}-degF)\). An International British thermal unit inch per second per square foot per degree Fahrenheit is a unit of thermal conductivity in the US Customary Units and British Imperial Units. \(1 Btu_{it} \cdot in/(hr \cdot ft^{2} \cdot degF)\) shows that one thermochemical BTU of heat per one hour moves through one square foot of material, which is one foot thick due to a temperature difference of one degree Fahrenheit.
unit:BTU_IT-IN-PER-FT2-SEC-DEG_F
URI: http://qudt.org/vocab/unit/BTU_IT-IN-PER-FT2-SEC-DEG_F
\(BTU_{IT}\), Inch per Square Foot Second Degree Fahrenheit, is an Imperial unit for 'Thermal Conductivity' expressed as \(Btu_{it}-in/(ft^{2}-s-degF)\).
unit:BTU_IT-IN-PER-HR-FT2-DEG_F
URI: http://qudt.org/vocab/unit/BTU_IT-IN-PER-HR-FT2-DEG_F
unit:BTU_IT-IN-PER-SEC-FT2-DEG_F
URI: http://qudt.org/vocab/unit/BTU_IT-IN-PER-SEC-FT2-DEG_F
unit:BTU_IT-PER-DEG_F
URI: http://qudt.org/vocab/unit/BTU_IT-PER-DEG_F
British Thermal Unit (IT) Per Fahrenheit Degree (\(Btu (IT)/^\circ F\)) is a measure of heat capacity. It can be converted to the corresponding standard SI unit J/K by multiplying its value by a factor of 1899.10534.
unit:BTU_IT-PER-DEG_R
URI: http://qudt.org/vocab/unit/BTU_IT-PER-DEG_R
\({\bf BTU \, per \, Degree \, Rankine}\) is an Imperial unit for 'Heat Capacity' expressed as \(Btu/degR\).
unit:BTU_IT-PER-FT2
URI: http://qudt.org/vocab/unit/BTU_IT-PER-FT2
\(\textbf{BTU per Square Foot}\) is an Imperial unit for 'Energy Per Area' expressed as \(Btu/ft^2\).
unit:BTU_IT-PER-FT2-HR-DEG_F
URI: http://qudt.org/vocab/unit/BTU_IT-PER-FT2-HR-DEG_F
\({\bf BTU \, per \, Square \, Foot \, Hour \, Degree \, Fahrenheit}\) is an Imperial unit for 'Coefficient Of Heat Transfer' expressed as \(Btu/(hr-ft^{2}-degF)\).
unit:BTU_IT-PER-FT2-SEC-DEG_F
URI: http://qudt.org/vocab/unit/BTU_IT-PER-FT2-SEC-DEG_F
\({\bf BTU \, per \, Square \, Foot \, Second \, Degree \, Fahrenheit}\) is an Imperial unit for 'Coefficient Of Heat Transfer' expressed as \(Btu/(ft^{2}-s-degF)\).
unit:BTU_IT-PER-FT3
URI: http://qudt.org/vocab/unit/BTU_IT-PER-FT3
\(\textit{British Thermal Unit (IT) Per Cubic Foot}\) (\(Btu (IT)/ft^3\)) is a unit in the category of Energy density. It is also known as Btu per cubic foot, Btu/cubic foot. This unit is commonly used in the UK, US unit systems. It has a dimension of \(ML^{-1}T^{-2}\) where \(M\) is mass, \(L\) is length, and \(T\) is time. It can be converted to the corresponding standard SI unit \(J/m^3\) by multiplying its value by a factor of 37258.94579.
unit:BTU_IT-PER-HR
URI: http://qudt.org/vocab/unit/BTU_IT-PER-HR
The British thermal unit (BTU or Btu) is a traditional unit of energy equal to about 1 055.05585 joules. It is approximately the amount of energy needed to heat 1 pound (0.454 kg) of water from \(39 \,^{\circ}{\rm F}\) (\(3.9 \,^{\circ}{\rm C}\)) to \(40 \,^{\circ}{\rm F}\) (\(4.4 \,^{\circ}{\rm C}\)). The unit is most often used in the power, steam generation, heating and air conditioning industries. In scientific contexts the BTU has largely been replaced by the SI unit of energy, the joule, though it may be used as a measure of agricultural energy production (BTU/kg).
unit:BTU_IT-PER-HR-FT2
URI: http://qudt.org/vocab/unit/BTU_IT-PER-HR-FT2
\(\textit{BTU per Hour Square Foot}\) is an Imperial unit for 'Power Per Area' expressed as \(Btu/(hr-ft^2)\).
unit:BTU_IT-PER-HR-FT2-DEG_R
URI: http://qudt.org/vocab/unit/BTU_IT-PER-HR-FT2-DEG_R
unit:BTU_IT-PER-LB
URI: http://qudt.org/vocab/unit/BTU_IT-PER-LB
The amount of energy generated by a pound of substance is measured in British thermal units (IT) per pound of mass. 1 \(Btu_{IT}/lb\) is equivalent to \(2.326 \times 10^3\) joule per kilogram (J/kg).
unit:BTU_IT-PER-LB-DEG_F
URI: http://qudt.org/vocab/unit/BTU_IT-PER-LB-DEG_F
British Thermal Unit (therm.) Per Pound Per Fahrenheit Degree (Btu (therm.)/lb- degF) is a unit in the category of Specific heat. This unit is commonly used in the UK unit system. British Thermal Unit (therm.) Per Pound Per Fahrenheit Degree (Btu (therm.)/lb-degF) has a dimension of \(L2T^{-2}Q^{-1}\) where \(L\) is length, \(T\) is time, and \(Q\) is temperature. It can be converted to the corresponding standard SI unit \(J/kg-K\) by multiplying its value by a factor of 4183.99895.
unit:BTU_IT-PER-LB-DEG_R
URI: http://qudt.org/vocab/unit/BTU_IT-PER-LB-DEG_R
\({\bf BTU \, per \, Pound \, Degree \, Rankine}\) is a unit for 'Specific Heat Capacity' expressed as \(Btu/(lb-degR)\).
unit:BTU_IT-PER-LB-MOL
URI: http://qudt.org/vocab/unit/BTU_IT-PER-LB-MOL
\({\bf BTU \, per \, Pound \,Mole}\) is an Imperial unit for 'Energy And Work Per Mass Amount Of Substance' expressed as \(Btu/(lb-mol)\).
unit:BTU_IT-PER-MOL-DEG_F
URI: http://qudt.org/vocab/unit/BTU_IT-PER-MOL-DEG_F
\({\bf BTU \, per \, Pound \, Mole \, Degree \, Fahrenheit}\) is an Imperial unit for 'Molar Heat Capacity' expressed as \(Btu/(lb-mol-degF)\).
unit:BTU_IT-PER-SEC
URI: http://qudt.org/vocab/unit/BTU_IT-PER-SEC
\({\bf BTU \, per \, Second}\) is an Imperial unit for 'Heat Flow Rate' expressed as \(Btu/s\).
unit:BTU_IT-PER-SEC-FT-DEG_R
URI: http://qudt.org/vocab/unit/BTU_IT-PER-SEC-FT-DEG_R
unit:BTU_IT-PER-SEC-FT2
URI: http://qudt.org/vocab/unit/BTU_IT-PER-SEC-FT2
\(\textit{BTU per Second Square Foot}\) is an Imperial unit for 'Power Per Area' expressed as \(Btu/(s\cdot ft^2)\).
unit:BTU_IT-PER-SEC-FT2-DEG_R
URI: http://qudt.org/vocab/unit/BTU_IT-PER-SEC-FT2-DEG_R
unit:BTU_TH
URI: http://qudt.org/vocab/unit/BTU_TH
(\{\bf (BTU_{th}}\), British Thermal Unit (thermochemical definition), is a traditional unit of energy equal to about \(1.0543502645 kilojoule\). It is approximately the amount of energy needed to heat 1 pound (0.454 kg) of water from \(39 \,^{\circ}{\rm F}\) (\(39 \,^{\circ}{\rm C}\)) to \(40 \,^{\circ}{\rm F}\) (\(4.4 \,^{\circ}{\rm C}\)). The unit is most often used in the power, steam generation, heating and air conditioning industries. In scientific contexts the BTU has largely been replaced by the SI unit of energy, the \(joule\).
unit:BTU_TH-FT-PER-FT2-HR-DEG_F
URI: http://qudt.org/vocab/unit/BTU_TH-FT-PER-FT2-HR-DEG_F
\({ \bf BTU_{TH} \, Foot \, per \, Square \, Foot \, Hour \, Degree \, Fahrenheit}\) is an Imperial unit for 'Thermal Conductivity' expressed as \(Btu_{th} \cdot ft/(hr \cdot ft^2 \cdot degF)\).
unit:BTU_TH-FT-PER-HR-FT2-DEG_F
URI: http://qudt.org/vocab/unit/BTU_TH-FT-PER-HR-FT2-DEG_F
unit:BTU_TH-IN-PER-FT2-HR-DEG_F
URI: http://qudt.org/vocab/unit/BTU_TH-IN-PER-FT2-HR-DEG_F
\({\bf BTU_{th}}\), Inch per Square Foot Hour Degree Fahrenheit, is an Imperial unit for 'Thermal Conductivity' expressed as \(Btu-in/(hr-ft^{2}-degF)\). A thermochemical British thermal unit inch per second per square foot per degree Fahrenheit is a unit of thermal conductivity in the US Customary Units and British Imperial Units. \(1 Btu_{th} \cdot in/(hr \cdot ft^{2} \cdot degF)\) shows that one thermochemical BTU of heat per one hour moves through one square foot of material, which is one foot thick due to a temperature difference of one degree Fahrenheit.
unit:BTU_TH-IN-PER-FT2-SEC-DEG_F
URI: http://qudt.org/vocab/unit/BTU_TH-IN-PER-FT2-SEC-DEG_F
\(BTU_{TH}\) Inch per Square Foot Second Degree Fahrenheit is an Imperial unit for 'Thermal Conductivity' expressed as \(Btu_{th} \cdot in/(ft^{2} \cdot s \cdot degF)\).
unit:BTU_TH-PER-FT3
URI: http://qudt.org/vocab/unit/BTU_TH-PER-FT3
British Thermal Unit (TH) Per Cubic Foot (\(Btu (TH)/ft^3\)) is a unit in the category of Energy density. It is also known as Btu per cubic foot, Btu/cubic foot. This unit is commonly used in the UK, US unit systems. It has a dimension of \(ML^{-1}T^{-2}\) where \(M\) is mass, \(L\) is length, and \(T\) is time. It can be converted to the corresponding standard SI unit \(J/m^3\) by multiplying its value by a factor of 37234.03.
unit:BTU_TH-PER-LB
URI: http://qudt.org/vocab/unit/BTU_TH-PER-LB
\({\bf Btu_{th} / lbm}\), British Thermal Unit (therm.) Per Pound Mass, is a unit in the category of Thermal heat capacity. It is also known as Btu per pound, Btu/pound, Btu/lb. This unit is commonly used in the UK unit system. British Thermal Unit (therm.) Per Pound Mass (Btu (therm.)/lbm) has a dimension of \(L^2T^{-2}\) where \(L\) is length, and \(T\) is time. It can be converted to the corresponding standard SI unit J/kg by multiplying its value by a factor of 2324.443861.
unit:BU_UK
URI: http://qudt.org/vocab/unit/BU_UK
A bushel is an imperial unit of dry volume, equivalent in each of these systems to 4 pecks or 8 gallons. It is used for volumes of dry commodities (not liquids), most often in agriculture. It is abbreviated as bsh. or bu. In modern usage, the dry volume is usually only nominal, with bushels referring to standard weights instead.
unit:BU_US
URI: http://qudt.org/vocab/unit/BU_US
A bushel is an imperial and U.S. customary unit of dry volume, equivalent in each of these systems to 4 pecks or 8 gallons. It is used for volumes of dry commodities (not liquids), most often in agriculture. It is abbreviated as bsh. or bu. In modern usage, the dry volume is usually only nominal, with bushels referring to standard weights instead.
unit:BYTE
URI: http://qudt.org/vocab/unit/BYTE
The byte is a unit of digital information in computing and telecommunications that most commonly consists of eight bits.
unit:C
URI: http://qudt.org/vocab/unit/C
The SI unit of electric charge. One coulomb is the amount of charge accumulated in one second by a current of one ampere. Electricity is actually a flow of charged particles, such as electrons, protons, or ions. The charge on one of these particles is a whole-number multiple of the charge e on a single electron, and one coulomb represents a charge of approximately 6.241 506 x 1018 e. The coulomb is named for a French physicist, Charles-Augustin de Coulomb (1736-1806), who was the first to measure accurately the forces exerted between electric charges.
unit:C-M
URI: http://qudt.org/vocab/unit/C-M
Coulomb Meter (C-m) is a unit in the category of Electric dipole moment. It is also known as atomic unit, u.a., au, ua. This unit is commonly used in the SI unit system. Coulomb Meter (C-m) has a dimension of LTI where L is length, T is time, and I is electric current. This unit is the standard SI unit in this category.
unit:C-M2
URI: http://qudt.org/vocab/unit/C-M2
Coulomb Square Meter (C-m2) is a unit in the category of Electric quadrupole moment. This unit is commonly used in the SI unit system. Coulomb Square Meter (C-m2) has a dimension of L2TI where L is length, T is time, and I is electric current. This unit is the standard SI unit in this category.
unit:C-M2-PER-V
URI: http://qudt.org/vocab/unit/C-M2-PER-V
Coulomb Square Meter (C-m2-per-volt) is a unit in the category of Electric polarizability.
unit:C-PER-KiloGM
URI: http://qudt.org/vocab/unit/C-PER-KiloGM
\(\textbf{Coulomb Per Kilogram (C/kg)}\) is the unit in the category of Exposure. It is also known as coulombs per kilogram, coulomb/kilogram. This unit is commonly used in the SI unit system. Coulomb Per Kilogram (C/kg) has a dimension of \(M^{-1}TI\) where \(M\) is mass, \(T\) is time, and \(I\) is electric current. This unit is the standard SI unit in this category.
unit:C-PER-KiloGM-SEC
URI: http://qudt.org/vocab/unit/C-PER-KiloGM-SEC
The SI unit of exposure rate
unit:C-PER-M
URI: http://qudt.org/vocab/unit/C-PER-M
"Coulomb per Meter" is a unit for 'Electric Charge Line Density' expressed as \(C/m\).
unit:C-PER-M2
URI: http://qudt.org/vocab/unit/C-PER-M2
Coulomb Per Square Meter (\(C/m^2\)) is a unit in the category of Electric charge surface density. It is also known as coulombs per square meter, coulomb per square metre, coulombs per square metre, coulomb/square meter, coulomb/square metre. This unit is commonly used in the SI unit system. Coulomb Per Square Meter (C/m2) has a dimension of \(L^{-2}TI\) where L is length, T is time, and I is electric current. This unit is the standard SI unit in this category.
unit:C-PER-M3
URI: http://qudt.org/vocab/unit/C-PER-M3
Coulomb Per Cubic Meter (\(C/m^{3}\)) is a unit in the category of Electric charge density. It is also known as coulomb per cubic metre, coulombs per cubic meter, coulombs per cubic metre, coulomb/cubic meter, coulomb/cubic metre. This unit is commonly used in the SI unit system. Coulomb Per Cubic Meter has a dimension of \(L^{-3}TI\) where \(L\) is length, \(T\) is time, and \(I\) is electric current. This unit is the standard SI unit in this category.
unit:C-PER-MOL
URI: http://qudt.org/vocab/unit/C-PER-MOL
(\(C/mol\)) is a unit in the category of Molar electric charge. It is also known as \(coulombs/mol\). Coulomb Per Mol has a dimension of \(TN{-1}I\) where \(T\) is time, \(N\) is amount of substance, and \(I\) is electric current. This unit is the standard SI unit in this category.
unit:C2-M-PER-J
URI: http://qudt.org/vocab/unit/C2-M-PER-J
"Square Coulomb Meter per Joule" is a unit for 'Polarizability' expressed as \(C^{2} m^{2} J^{-1}\).
unit:C3-M-PER-J2
URI: http://qudt.org/vocab/unit/C3-M-PER-J2
"Cubic Coulomb Meter per Square Joule" is a unit for 'Cubic Electric Dipole Moment Per Square Energy' expressed as \(C^{3} m^{3} J^{-2}\).
unit:C4-M4-PER-J3
URI: http://qudt.org/vocab/unit/C4-M4-PER-J3
"Quartic Coulomb Meter per Cubic Energy" is a unit for 'Quartic Electric Dipole Moment Per Cubic Energy' expressed as \(C^{4} m^{4} J^{-3}\).
unit:CAL_IT-PER-GM
URI: http://qudt.org/vocab/unit/CAL_IT-PER-GM
Calories produced per gram of substance.
unit:CAL_IT-PER-SEC-CentiM-K
URI: http://qudt.org/vocab/unit/CAL_IT-PER-SEC-CentiM-K
unit:CAL_IT-PER-SEC-CentiM2-K
URI: http://qudt.org/vocab/unit/CAL_IT-PER-SEC-CentiM2-K
unit:CAL_TH
URI: http://qudt.org/vocab/unit/CAL_TH
The energy needed to increase the temperature of a given mass of water by \(1 ^\circ C\) at atmospheric pressure depends on the starting temperature and is difficult to measure precisely. Accordingly, there have been several definitions of the calorie. The two perhaps most popular definitions used in older literature are the \(15 ^\circ C\) calorie and the thermochemical calorie.
unit:CAL_TH-PER-CentiM-SEC-DEG_C
URI: http://qudt.org/vocab/unit/CAL_TH-PER-CentiM-SEC-DEG_C
unit:CAL_TH-PER-G
URI: http://qudt.org/vocab/unit/CAL_TH-PER-G
\(Thermochemical Calorie. Calories produced per gram of substance.\)
unit:CAL_TH-PER-GM
URI: http://qudt.org/vocab/unit/CAL_TH-PER-GM
Thermochemical Calorie. Calories produced per gram of substance.
unit:CAL_TH-PER-SEC-CentiM-K
URI: http://qudt.org/vocab/unit/CAL_TH-PER-SEC-CentiM-K
unit:CAL_TH-PER-SEC-CentiM2-K
URI: http://qudt.org/vocab/unit/CAL_TH-PER-SEC-CentiM2-K
unit:CARAT
URI: http://qudt.org/vocab/unit/CARAT
The carat is a unit of mass equal to 200 mg and is used for measuring gemstones and pearls. The current definition, sometimes known as the metric carat, was adopted in 1907 at the Fourth General Conference on Weights and Measures, and soon afterward in many countries around the world. The carat is divisible into one hundred points of two milligrams each. Other subdivisions, and slightly different mass values, have been used in the past in different locations. In terms of diamonds, a paragon is a flawless stone of at least 100 carats (20 g). The ANSI X.12 EDI standard abbreviation for the carat is \(CD\).
unit:CASES-PER-1000I-YR
URI: http://qudt.org/vocab/unit/CASES-PER-1000I-YR
The typical expression of morbidity rate, expressed as cases per 1000 individuals, per year.
unit:CD
URI: http://qudt.org/vocab/unit/CD
\(\textit{Candela}\) is a unit for 'Luminous Intensity' expressed as \(cd\). The candela is the SI base unit of luminous intensity; that is, power emitted by a light source in a particular direction, weighted by the luminosity function (a standardized model of the sensitivity of the human eye to different wavelengths, also known as the luminous efficiency function). A common candle emits light with a luminous intensity of roughly one candela.
unit:CD-PER-IN2
URI: http://qudt.org/vocab/unit/CD-PER-IN2
"Candela per Square Inch" is a unit for 'Luminance' expressed as \(cd/in^{2}\).
unit:CD-PER-M2
URI: http://qudt.org/vocab/unit/CD-PER-M2
The candela per square metre (\(cd/m^2\)) is the derived SI unit of luminance. The unit is based on the candela, the SI unit of luminous intensity, and the square metre, the SI unit of area. Nit (nt) is a deprecated non-SI name also used for this unit (\(1 nit = 1 cd/m^2\)). As a measure of light emitted per unit area, this unit is frequently used to specify the brightness of a display device. Most consumer desktop liquid crystal displays have luminances of 200 to 300 \(cd/m^2\); the sRGB spec for monitors targets 80 cd/m2. HDTVs range from 450 to about 1000 cd/m2. Typically, calibrated monitors should have a brightness of \(120 cd/m^2\). \(Nit\) is believed to come from the Latin word nitere, to shine.
unit:CFU
URI: http://qudt.org/vocab/unit/CFU
"Colony Forming Unit" is a unit for 'Microbial Formation' expressed as \(CFU\).
unit:CH
URI: http://qudt.org/vocab/unit/CH
A chain is a unit of length. It measures 66 feet, or 22 yards, or 100 links, or 4 rods. There are 10 chains in a furlong, and 80 chains in one statute mile. An acre is the area of 10 square chains (that is, an area of one chain by one furlong). The chain has been used for several centuries in Britain and in some other countries influenced by British practice.
unit:CLO
URI: http://qudt.org/vocab/unit/CLO
A C.G.S System unit for \(\textit{Thermal Insulance}\) expressed as "clo".
unit:CORD
URI: http://qudt.org/vocab/unit/CORD
The cord is a unit of measure of dry volume used in Canada and the United States to measure firewood and pulpwood. A cord is the amount of wood that, when 'ranked and well stowed' (arranged so pieces are aligned, parallel, touching and compact), occupies a volume of 128 cubic feet (3.62 cubic metres). This corresponds to a well stacked woodpile 4 feet (122 cm) wide, 4 feet (122 cm) high, and 8 feet (244 cm) long; or any other arrangement of linear measurements that yields the same volume. The name cord probably comes from the use of a cord or string to measure it.
unit:CP
URI: http://qudt.org/vocab/unit/CP
"Candlepower" (abbreviated as cp) is a now-obsolete unit which was used to express levels of light intensity in terms of the light emitted by a candle of specific size and constituents. In modern usage Candlepower equates directly to the unit known as the candela.
unit:CUP
URI: http://qudt.org/vocab/unit/CUP
"US Liquid Cup" is a unit for 'Liquid Volume' expressed as \(cup\).
unit:CWT_LONG
URI: http://qudt.org/vocab/unit/CWT_LONG
"Hundred Weight - Long" is a unit for 'Mass' expressed as \(cwt\).
unit:CWT_SHORT
URI: http://qudt.org/vocab/unit/CWT_SHORT
"Hundred Weight - Short" is a unit for 'Mass' expressed as \(cwt\).
unit:C_Ab
URI: http://qudt.org/vocab/unit/C_Ab
"abcoulomb" (abC or aC) or electromagnetic unit of charge (emu of charge) is the basic physical unit of electric charge in the cgs-emu system of units. One abcoulomb is equal to ten coulombs (\(1\,abC\,=\,10\,C\)).
unit:C_Ab-PER-CentiM2
URI: http://qudt.org/vocab/unit/C_Ab-PER-CentiM2
Abcoulomb Per Square Centimeter is a unit in the category of Electric charge surface density. It is also known as abcoulombs per square centimeter, abcoulomb per square centimetre, abcoulombs per square centimetre, abcoulomb/square centimeter,abcoulomb/square centimetre. This unit is commonly used in the cgs unit system. Abcoulomb Per Square Centimeter (abcoulomb/cm2) has a dimension of \(L_2TI\). where L is length, T is time, and I is electric current. It can be converted to the corresponding standard SI unit \(C/m^2\) by multiplying its value by a factor of 100,000.
unit:C_Stat
URI: http://qudt.org/vocab/unit/C_Stat
The statcoulomb (\(statC\)) or franklin (\(Fr\)) or electrostatic unit of charge (\(esu\)) is the physical unit for electrical charge used in the centimetre-gram-second system of units (cgs) and Gaussian units. It is a derived unit given by \(1\ statC = 1\ g\ cm\ s = 1\ erg\ cm\). The SI system of units uses the coulomb (C) instead. The conversion between C and statC is different in different contexts. The number 2997924580 is 10 times the value of the speed of light expressed in meters/second, and the conversions are exact except where indicated. The coulomb is an extremely large charge rarely encountered in electrostatics, while the statcoulomb is closer to everyday charges.
unit:C_Stat-PER-CentiM2
URI: http://qudt.org/vocab/unit/C_Stat-PER-CentiM2
\(\textbf{Statcoulomb per Square Centimeter}\) is a unit of measure for electric flux density and electric polarization. One Statcoulomb per Square Centimeter is \(2.15\times 10^9 \, coulomb\,per\,square\,inch\).
unit:C_Stat-PER-MOL
URI: http://qudt.org/vocab/unit/C_Stat-PER-MOL
"Statcoulomb per Mole" is a unit of measure for the electical charge associated with one mole of a substance. The mole is a unit of measurement used in chemistry to express amounts of a chemical substance, defined as an amount of a substance that contains as many elementary entities (e.g., atoms, molecules, ions, electrons) as there are atoms in 12 grams of pure carbon-12 (12C), the isotope of carbon with atomic weight 12.
unit:CaymanIslandsDollar
URI: http://qudt.org/vocab/unit/CaymanIslandsDollar
Cayman Islands
unit:CentiBAR
URI: http://qudt.org/vocab/unit/CentiBAR
The bar is a non-SI unit of pressure, defined by the IUPAC as exactly equal to 100,000 Pa. It is about equal to the atmospheric pressure on Earth at sea level, and since 1982 the IUPAC has recommended that the standard for atmospheric pressure should be harmonized to \(100,000\,Pa = 1 bar \approx 750.0616827 Torr\). Units derived from the bar are the megabar (symbol: Mbar), kilobar (symbol: kbar), decibar (symbol: dbar), centibar (symbol: cbar), and millibar (symbol: mbar or mb). They are not SI or cgs units, but they are accepted for use with the SI.
unit:CentiC
URI: http://qudt.org/vocab/unit/CentiC
A CentiCoulomb is \(10^{-2} C\).
unit:CentiM
URI: http://qudt.org/vocab/unit/CentiM
A centimetre is a unit of length in the metric system, equal to one hundredth of a metre, which is the SI base unit of length. Centi is the SI prefix for a factor of 10. The centimetre is the base unit of length in the now deprecated centimetre-gram-second (CGS) system of units.
unit:CentiM-PER-KiloYR
URI: http://qudt.org/vocab/unit/CentiM-PER-KiloYR
Unavailable
unit:CentiM-PER-SEC
URI: http://qudt.org/vocab/unit/CentiM-PER-SEC
"Centimeter per Second" is a C.G.S System unit for 'Linear Velocity' expressed as \(cm/s\).
unit:CentiM-PER-SEC2
URI: http://qudt.org/vocab/unit/CentiM-PER-SEC2
\(\textit{Centimeter per Square Second}\) is a C.G.S System unit for \(\textit{Linear Acceleration}\) expressed as \(cm/s^2\).
unit:CentiM-SEC-DEG_C
URI: http://qudt.org/vocab/unit/CentiM-SEC-DEG_C
\(\textbf{Centimeter Second Degree Celsius}\) is a C.G.S System unit for 'Length Temperature Time' expressed as \(cm-s-degC\).
unit:CentiM2
URI: http://qudt.org/vocab/unit/CentiM2
A unit of area equal to that of a square, of sides 1cm
unit:CentiM2-MIN
URI: http://qudt.org/vocab/unit/CentiM2-MIN
"Square centimeter minute" is a unit for 'Area Time' expressed as \(cm^{2} . m\).
unit:CentiM2-PER-CentiM3
URI: http://qudt.org/vocab/unit/CentiM2-PER-CentiM3
Unavailable
unit:CentiM2-SEC
URI: http://qudt.org/vocab/unit/CentiM2-SEC
"Square Centimeter Second" is a C.G.S System unit for 'Area Time' expressed as \(cm^2 . s\).
unit:CentiM3
URI: http://qudt.org/vocab/unit/CentiM3
The CGS unit of volume, equal to 10-6 cubic meter, 1 milliliter, or about 0.061 023 7 cubic inch
unit:CentiM3-PER-MOL-SEC
URI: http://qudt.org/vocab/unit/CentiM3-PER-MOL-SEC
A unit that is the 0.000001-fold of the power of the SI base unit metre with the exponent 3 divided by the SI base unit mol multiplied by the SI base unit second.
unit:CentiM_H2O
URI: http://qudt.org/vocab/unit/CentiM_H2O
\(\textbf{Centimeter of Water}\) is a C.G.S System unit for 'Force Per Area' expressed as \(cm_{H2O}\).
unit:CentiPOISE
URI: http://qudt.org/vocab/unit/CentiPOISE
\(\textbf{Centipoise}\) is a C.G.S System unit for 'Dynamic Viscosity' expressed as \(cP\).
unit:CentiST
URI: http://qudt.org/vocab/unit/CentiST
\(\textbf{Centistokes}\) is a C.G.S System unit for 'Kinematic Viscosity' expressed as \(cSt\).
unit:Ci
URI: http://qudt.org/vocab/unit/Ci
The curie (symbol Ci) is a non-SI unit of radioactivity, named after Marie and Pierre Curie. It is defined as \(1Ci = 3.7 \times 10^{10} decays\ per\ second\). Its continued use is discouraged. One Curie is roughly the activity of 1 gram of the radium isotope Ra, a substance studied by the Curies. The SI derived unit of radioactivity is the becquerel (Bq), which equates to one decay per second. Therefore: \(1Ci = 3.7 \times 10^{10} Bq= 37 GBq\) and \(1Bq \equiv 2.703 \times 10^{-11}Ci \).
unit:ConvertibleMark
URI: http://qudt.org/vocab/unit/ConvertibleMark
Bosnia and Herzegovina
unit:DAY_Sidereal
URI: http://qudt.org/vocab/unit/DAY_Sidereal
The length of time which passes between a given fixed star in the sky crossing a given projected meridian (line of longitude). The sidereal day is \(23 h 56 m 4.1 s\), slightly shorter than the solar day because the Earth 's orbital motion about the Sun means the Earth has to rotate slightly more than one turn with respect to the "fixed" stars in order to reach the same Earth-Sun orientation. Another way of thinking about the difference is that it amounts to \(1/365.2425^{th}\) of a day per day, since even if the Earth did not spin on its axis at all, the Sun would appear to make one rotation around the Earth as the Earth completed a single orbit (which takes one year).
unit:DEATHS-PER-1000000I-YR
URI: http://qudt.org/vocab/unit/DEATHS-PER-1000000I-YR
The expression of mortality rate, expressed as deaths per 1,000,000 individuals, per year.
unit:DEATHS-PER-1000I-YR
URI: http://qudt.org/vocab/unit/DEATHS-PER-1000I-YR
The typical expression of mortality rate, expressed as deaths per 1000 individuals, per year.
unit:DECADE
URI: http://qudt.org/vocab/unit/DECADE
One decade is a factor of 10 difference between two numbers (an order of magnitude difference) measured on a logarithmic scale. It is especially useful when referring to frequencies and when describing frequency response of electronic systems, such as audio amplifiers and filters. The factor-of-ten in a decade can be in either direction: so one decade up from 100 Hz is 1000 Hz, and one decade down is 10 Hz. The factor-of-ten is what is important, not the unit used, so \(3.14 rad/s\) is one decade down from \(31.4 rad/s\).
unit:DEG
URI: http://qudt.org/vocab/unit/DEG
A degree (in full, a degree of arc, arc degree, or arcdegree), usually denoted by \(^\circ\) (the degree symbol), is a measurement of plane angle, representing 1/360 of a full rotation; one degree is equivalent to \(2\pi /360 rad\), \(0.017453 rad\). It is not an SI unit, as the SI unit for angles is radian, but is an accepted SI unit.
unit:DEG-PER-HR
URI: http://qudt.org/vocab/unit/DEG-PER-HR
"Degree per Hour" is an Imperial unit for 'Angular Velocity' expressed as \(deg/h\).
unit:DEG-PER-M
URI: http://qudt.org/vocab/unit/DEG-PER-M
A change of angle in one SI unit of length.
unit:DEG-PER-MIN
URI: http://qudt.org/vocab/unit/DEG-PER-MIN
A unit of measure for the rate of change of plane angle, \(d\omega / dt\), in durations of one minute.The vector \(\omega\) is directed along the axis of rotation in the direction for which the rotation is clockwise.
unit:DEG-PER-SEC
URI: http://qudt.org/vocab/unit/DEG-PER-SEC
"Degree per Second" is an Imperial unit for 'Angular Velocity' expressed as \(deg/s\).
unit:DEG-PER-SEC2
URI: http://qudt.org/vocab/unit/DEG-PER-SEC2
\(\textit{Degree per Square Second}\) is an Imperial unit for \(\textit{Angular Acceleration}\) expressed as \(deg/s^2\).
unit:DEG2
URI: http://qudt.org/vocab/unit/DEG2
A square degree is a non-SI unit measure of solid angle. It is denoted in various ways, including deg, sq. deg. and \(\circ^2\). Just as degrees are used to measure parts of a circle, square degrees are used to measure parts of a sphere. Analogous to one degree being equal to \(\pi /180 radians\), a square degree is equal to (\(\pi /180)\) or about 1/3283 steradian. The number of square degrees in a whole sphere is or approximately 41 253 deg. This is the total area of the 88 constellations in the list of constellations by area. For example, observed from the surface of the Earth, the Moon has a diameter of approximately \(0.5^\circ\), so it covers a solid angle of approximately 0.196 deg, which is \(4.8 \times 10\) of the total sky sphere.
unit:DEG_C
URI: http://qudt.org/vocab/unit/DEG_C
\(\textit{Celsius}\), also known as centigrade, is a scale and unit of measurement for temperature. It can refer to a specific temperature on the Celsius scale as well as a unit to indicate a temperature interval, a difference between two temperatures or an uncertainty. This definition fixes the magnitude of both the degree Celsius and the kelvin as precisely 1 part in 273.16 (approximately 0.00366) of the difference between absolute zero and the triple point of water. Thus, it sets the magnitude of one degree Celsius and that of one kelvin as exactly the same. Additionally, it establishes the difference between the two scales' null points as being precisely \(273.15\,^{\circ}{\rm C}\).
unit:DEG_C-CentiM
URI: http://qudt.org/vocab/unit/DEG_C-CentiM
\(\textbf{Degree Celsius Centimeter} is a C.G.S System unit for 'Length Temperature' expressed as \(cm-degC\).
unit:DEG_C-KiloGM-PER-M2
URI: http://qudt.org/vocab/unit/DEG_C-KiloGM-PER-M2
Derived unit for the product of the temperature in degrees Celsius and the mass density of a medium, integrated over vertical depth or height in metres.
unit:DEG_C-PER-HR
URI: http://qudt.org/vocab/unit/DEG_C-PER-HR
\(\textbf{Degree Celsius per Hour} is a unit for 'Temperature Per Time' expressed as \(degC / hr\).
unit:DEG_C-PER-MIN
URI: http://qudt.org/vocab/unit/DEG_C-PER-MIN
\(\textbf{Degree Celsius per Minute} is a unit for 'Temperature Per Time' expressed as \(degC / m\).
unit:DEG_C-PER-SEC
URI: http://qudt.org/vocab/unit/DEG_C-PER-SEC
\(\textbf{Degree Celsius per Second} is a unit for 'Temperature Per Time' expressed as \(degC / s\).
unit:DEG_C-PER-YR
URI: http://qudt.org/vocab/unit/DEG_C-PER-YR
A rate of change of temperature expressed on the Celsius scale over a period of an average calendar year (365.25 days).
unit:DEG_C-WK
URI: http://qudt.org/vocab/unit/DEG_C-WK
temperature multiplied by unit of time.
unit:DEG_C_GROWING_CEREAL-DAY
URI: http://qudt.org/vocab/unit/DEG_C_GROWING_CEREAL-DAY
unit:DEG_F
URI: http://qudt.org/vocab/unit/DEG_F
\(\textbf{Degree Fahrenheit} is an Imperial unit for 'Thermodynamic Temperature' expressed as \(\,^{\circ}{\rm F}\)
unit:DEG_F-HR-FT2-PER-BTU_IT
URI: http://qudt.org/vocab/unit/DEG_F-HR-FT2-PER-BTU_IT
unit:DEG_F-HR-FT2-PER-BTU_TH
URI: http://qudt.org/vocab/unit/DEG_F-HR-FT2-PER-BTU_TH
unit:DEG_F-HR-PER-BTU_IT
URI: http://qudt.org/vocab/unit/DEG_F-HR-PER-BTU_IT
\(\textbf{Degree Fahrenheit Hour per BTU} is an Imperial unit for 'Thermal Resistance' expressed as \(degF-hr/Btu\).
unit:DEG_F-PER-HR
URI: http://qudt.org/vocab/unit/DEG_F-PER-HR
\(\textbf{Degree Fahrenheit per Hour} is a unit for 'Temperature Per Time' expressed as \(degF / h\).
unit:DEG_F-PER-MIN
URI: http://qudt.org/vocab/unit/DEG_F-PER-MIN
\(\textbf{Degree Fahrenheit per Minute} is a unit for 'Temperature Per Time' expressed as \(degF / m\).
unit:DEG_F-PER-SEC
URI: http://qudt.org/vocab/unit/DEG_F-PER-SEC
\(\textbf{Degree Fahrenheit per Second} is a unit for 'Temperature Per Time' expressed as \(degF / s\).
unit:DEG_F-PER-SEC2
URI: http://qudt.org/vocab/unit/DEG_F-PER-SEC2
\(\textit{Degree Fahrenheit per Square Second}\) is a C.G.S System unit for expressinh the acceleration of a temperature expressed as \(degF / s^2\).
unit:DEG_R
URI: http://qudt.org/vocab/unit/DEG_R
Rankine is a thermodynamic (absolute) temperature scale. The symbol for degrees Rankine is \(^\circ R\) or \(^\circ Ra\) if necessary to distinguish it from the Rømer and Réaumur scales). Zero on both the Kelvin and Rankine scales is absolute zero, but the Rankine degree is defined as equal to one degree Fahrenheit, rather than the one degree Celsius used by the Kelvin scale. A temperature of \(-459.67 ^\circ F\) is exactly equal to \(0 ^\circ R\).
unit:DEG_R-PER-HR
URI: http://qudt.org/vocab/unit/DEG_R-PER-HR
\(A rate of change of temperature measured in degree Rankine in periods of one hour.\)
unit:DEG_R-PER-MIN
URI: http://qudt.org/vocab/unit/DEG_R-PER-MIN
\(A rate of change of temperature measured in degree Rankine in periods of one minute\)
unit:DEG_R-PER-SEC
URI: http://qudt.org/vocab/unit/DEG_R-PER-SEC
\(A rate of change of temperature measured in degree Rankine in periods of one second.\)
unit:DIOPTER
URI: http://qudt.org/vocab/unit/DIOPTER
A dioptre, or diopter, is a unit of measurement for the optical power of a lens or curved mirror, which is equal to the reciprocal of the focal length measured in metres (that is, \(1/metre\)). For example, a \(3 \; dioptre\) lens brings parallel rays of light to focus at \(1/3\,metre\). The same unit is also sometimes used for other reciprocals of distance, particularly radii of curvature and the vergence of optical beams. Though the diopter is based on the SI-metric system it has not been included in the standard so that there is no international name or abbreviation for this unit of measurement within the international system of units this unit for optical power would need to be specified explicitly as the inverse metre.
unit:DWT
URI: http://qudt.org/vocab/unit/DWT
"Penny Weight" is a unit for 'Mass' expressed as \(dwt\).
unit:DYN
URI: http://qudt.org/vocab/unit/DYN
In physics, the dyne is a unit of force specified in the centimetre-gram-second (CGS) system of units. One dyne is equal to In physics, the dyne is a unit of force specified in the centimetre-gram-second (CGS) system of units. One dyne is equal to \SI{10}{\micro\newton}. Equivalently, the dyne is defined as 'the force required to accelerate a mass of one gram at a rate of one centimetre per square second'. The dyne per centimetre is the unit traditionally used to measure surface tension.
unit:DYN-CentiM
URI: http://qudt.org/vocab/unit/DYN-CentiM
"Dyne Centimeter" is a C.G.S System unit for 'Torque' expressed as \(dyn-cm\).
unit:DYN-PER-CentiM2
URI: http://qudt.org/vocab/unit/DYN-PER-CentiM2
"Dyne per Square Centimeter" is a C.G.S System unit for 'Force Per Area' expressed as \(dyn/cm^{2}\).
unit:Da
URI: http://qudt.org/vocab/unit/Da
The unified atomic mass unit (symbol: \(\mu\)) or dalton (symbol: Da) is a unit that is used for indicating mass on an atomic or molecular scale. It is defined as one twelfth of the rest mass of an unbound atom of carbon-12 in its nuclear and electronic ground state, and has a value of \(1.660538782(83) \times 10^{-27} kg\). One \(Da\) is approximately equal to the mass of one proton or one neutron. The CIPM have categorised it as a "non-SI unit whose values in SI units must be obtained experimentally".
unit:DanishKrone
URI: http://qudt.org/vocab/unit/DanishKrone
Denmark, Faroe Islands, Greenland
unit:Debye
URI: http://qudt.org/vocab/unit/Debye
"Debye" is a C.G.S System unit for 'Electric Dipole Moment' expressed as \(D\).
unit:DeciB
URI: http://qudt.org/vocab/unit/DeciB
A customary logarithmic measure most commonly used (in various ways) for measuring sound.Sound is measured on a logarithmic scale. Informally, if one sound is \(1\,bel\) (10 decibels) "louder" than another, this means the louder sound is 10 times louder than the fainter one. A difference of 20 decibels corresponds to an increase of 10 x 10 or 100 times in intensity. The beginning of the scale, 0 decibels, can be set in different ways, depending on exactly the aspect of sound being measured. For sound intensity (the power of the sound waves per unit of area) \(0\,decibel\) is equal to \(1\,picoWatts\,per\,Metre\,Squared\). This corresponds approximately to the faintest sound that can be detected by a person who has good hearing. For sound pressure (the pressure exerted by the sound waves) 0 decibels equals \(20\,micropascals\,RMS\), and for sound power \(0\,decibels\) sometimes equals \(1\,picoWatt\). In all cases, one decibel equals \(\approx\,0.115129\,neper\).
unit:DeciBAR
URI: http://qudt.org/vocab/unit/DeciBAR
The bar is a non-SI unit of pressure, defined by the IUPAC as exactly equal to 100,000 Pa. It is about equal to the atmospheric pressure on Earth at sea level, and since 1982 the IUPAC has recommended that the standard for atmospheric pressure should be harmonized to \(100,000 Pa = 1 bar \approx 750.0616827 Torr\). Units derived from the bar are the megabar (symbol: Mbar), kilobar (symbol: kbar), decibar (symbol: dbar), centibar (symbol: cbar), and millibar (symbol: mbar or mb). They are not SI or cgs units, but they are accepted for use with the SI.
unit:DeciBAR-PER-YR
URI: http://qudt.org/vocab/unit/DeciBAR-PER-YR
A rate of change of pressure expressed in decibars over a period of an average calendar year (365.25 days).
unit:DeciB_C
URI: http://qudt.org/vocab/unit/DeciB_C
"Decibel Carrier Unit" is a unit for 'Signal Detection Threshold' expressed as \(dBc\).
unit:DeciB_M
URI: http://qudt.org/vocab/unit/DeciB_M
"Decibel Referred to 1mw" is a 'Dimensionless Ratio' expressed as \(dBm\).
unit:DeciM
URI: http://qudt.org/vocab/unit/DeciM
A decimeter is a tenth of a meter.
unit:Denar
URI: http://qudt.org/vocab/unit/Denar
Former Yugoslav Republic of Macedonia
unit:Denier
URI: http://qudt.org/vocab/unit/Denier
Denier or den is a unit of measure for the linear mass density of fibers. It is defined as the mass in grams per 9,000 meters. In the International System of Units the tex is used instead (see below). The denier is based on a natural standard: a single strand of silk is approximately one denier. A 9,000-meter strand of silk weighs about one gram. The term denier is from the French denier, a coin of small value (worth 1/12 of a sou). Applied to yarn, a denier was held to be equal in weight to 1/24 of an ounce. The term microdenier is used to describe filaments that weigh less than one gram per 9,000 meter length.
unit:Dobra
URI: http://qudt.org/vocab/unit/Dobra
The currency of São Tomé and Príncipe
unit:DominicanPeso
URI: http://qudt.org/vocab/unit/DominicanPeso
Dominican Republic
unit:E
URI: http://qudt.org/vocab/unit/E
"Elementary Charge", usually denoted as \(e\), is the electric charge carried by a single proton, or equivalently, the negation (opposite) of the electric charge carried by a single electron. This elementary charge is a fundamental physical constant. To avoid confusion over its sign, e is sometimes called the elementary positive charge. This charge has a measured value of approximately \(1.602176565(35) \times 10 coulombs\). In the cgs system, \(e\) is \(4.80320425(10) \times 10 statcoulombs\).
unit:ERG
URI: http://qudt.org/vocab/unit/ERG
An erg is the unit of energy and mechanical work in the centimetre-gram-second (CGS) system of units, symbol 'erg'. Its name is derived from the Greek ergon, meaning 'work'. An erg is the amount of work done by a force of one dyne exerted for a distance of one centimeter. In the CGS base units, it is equal to one gram centimeter-squared per second-squared (\(g \cdot cm^2/s^2\)). It is thus equal to \(10^{-7}\) joules or 100 nanojoules in SI units. \(1 erg = 10^{-7} J = 100 nJ\), \(1 erg = 624.15 GeV = 6.2415 \times 10^{11} eV\), \(1 erg = 1 dyne\cdot cm = 1 g \cdot cm^2/s^2\).
unit:ERG-PER-CentiM2-SEC
URI: http://qudt.org/vocab/unit/ERG-PER-CentiM2-SEC
"Erg per Square Centimeter Second" is a C.G.S System unit for 'Power Per Area' expressed as \(erg/(cm^{2}-s)\).
unit:ERG-PER-SEC
URI: http://qudt.org/vocab/unit/ERG-PER-SEC
"Erg per Second" is a C.G.S System unit for 'Power' expressed as \(erg/s\).
unit:ERLANG
URI: http://qudt.org/vocab/unit/ERLANG
The "Erlang" is a dimensionless unit that is used in telephony as a measure of offered load or carried load on service-providing elements such as telephone circuits or telephone switching equipment.
unit:EV
URI: http://qudt.org/vocab/unit/EV
An electron volt (eV) is the energy that an electron gains when it travels through a potential of one volt. You can imagine that the electron starts at the negative plate of a parallel plate capacitor and accelerates to the positive plate, which is at one volt higher potential. Numerically \(1 eV\) equals \(1.6x10^{-19} joules\), where \(1 joule\) is \(6.2x10^{18} eV\). For example, it would take \(6.2x10^{20} eV/sec\) to light a 100 watt light bulb.
unit:EV-PER-K
URI: http://qudt.org/vocab/unit/EV-PER-K
\(\textbf{Electron Volt per Kelvin} is a unit for 'Heat Capacity' expressed as \(ev/K\).
unit:EV-PER-T
URI: http://qudt.org/vocab/unit/EV-PER-T
"Electron Volt per Tesla" is a unit for 'Magnetic Dipole Moment' expressed as \(eV T^{-1}\).
unit:EV-SEC
URI: http://qudt.org/vocab/unit/EV-SEC
"Electron Volt Second" is a unit for 'Angular Momentum' expressed as \(eV s\).
unit:E_h
URI: http://qudt.org/vocab/unit/E_h
The \(\textit{Hartree}\) (symbol: \(E_h\) or \(Ha\)), also known as the \(\text{Hartree\,Energy}\), is the atomic unit of energy. The hartree energy is equal to the absolute value of the electric potential energy of the hydrogen atom in its ground state. The energy of the electron in an H-atom in its ground state is \(-E_H\), where \(E_H= 2 R_\infty \cdot hc_0\). The 2006 CODATA recommended value was \(E_H = 4.35974394(22) \times 10^{-18} J = 27.21138386(68) eV\).
where, \(e\) is the elementary charge, \(\epsilon_0\) is the electric constant, and \(a_0\) is the Bohr radius.'
unit:EarthMass
URI: http://qudt.org/vocab/unit/EarthMass
Earth mass (\(M_{\oplus}\)) is the unit of mass equal to that of the Earth. In SI Units, \(1 M_{\oplus} = 5.9722 \times 1024 kg\). Earth mass is often used to describe masses of rocky terrestrial planets. The four terrestrial planets of the Solar System, Mercury, Venus, Earth, and Mars, have masses of 0.055, 0.815, 1.000, and 0.107 Earth masses respectively.
unit:EastCaribbeanDollar
URI: http://qudt.org/vocab/unit/EastCaribbeanDollar
Anguilla, Antigua and Barbuda, Dominica, Grenada, Montserrat, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines
unit:ElementaryCharge
URI: http://qudt.org/vocab/unit/ElementaryCharge
\(\textbf{Elementary Charge}, usually denoted as \(e\), is the electric charge carried by a single proton, or equivalently, the negation (opposite) of the electric charge carried by a single electron. This elementary charge is a fundamental physical constant. To avoid confusion over its sign, e is sometimes called the elementary positive charge. This charge has a measured value of approximately \(1.602176565(35) \times 10\,coulombs\). In the cgs system, \(e\) is \(4.80320425(10) \times 10\, statcoulombs\).
unit:EuropeanCompositeUnit
URI: http://qudt.org/vocab/unit/EuropeanCompositeUnit
Bonds market unit
unit:EuropeanMonetaryUnit
URI: http://qudt.org/vocab/unit/EuropeanMonetaryUnit
Bonds market unit
unit:EuropeanUnitOfAccount17
URI: http://qudt.org/vocab/unit/EuropeanUnitOfAccount17
Bonds market unit
unit:EuropeanUnitOfAccount9
URI: http://qudt.org/vocab/unit/EuropeanUnitOfAccount9
Bonds market unit
unit:ExaBYTE
URI: http://qudt.org/vocab/unit/ExaBYTE
The exabyte is a multiple of the unit byte for digital information. The prefix exa means 10^18 in the International System of Units (SI), so ExaByte is 10^18 Bytes.
unit:ExbiBYTE
URI: http://qudt.org/vocab/unit/ExbiBYTE
The exbibyte is a multiple of the unit byte for digital information. The prefix exbi means 1024^6
unit:F
URI: http://qudt.org/vocab/unit/F
"Faraday" is a unit for 'Electric Charge' expressed as \(F\).
unit:FA
URI: http://qudt.org/vocab/unit/FA
"Fractional area" is a unit for 'Solid Angle' expressed as \(fa\).
unit:FARAD
URI: http://qudt.org/vocab/unit/FARAD
The SI unit of electric capacitance. Very early in the study of electricity scientists discovered that a pair of conductors separated by an insulator can store a much larger charge than an isolated conductor can store. The better the insulator, the larger the charge that the conductors can hold. This property of a circuit is called capacitance, and it is measured in farads. One farad is defined as the ability to store one coulomb of charge per volt of potential difference between the two conductors. This is a natural definition, but the unit it defines is very large. In practical circuits, capacitance is often measured in microfarads, nanofarads, or sometimes even in picofarads (10-12 farad, or trillionths of a farad). The unit is named for the British physicist Michael Faraday (1791-1867), who was known for his work in electricity and electrochemistry.
unit:FARAD-PER-M
URI: http://qudt.org/vocab/unit/FARAD-PER-M
Farad Per Meter (\(F/m\)) is a unit in the category of Electric permittivity. It is also known as farad/meter. This unit is commonly used in the SI unit system. Farad Per Meter has a dimension of M-1L-3T4I2 where M is mass, L is length, T is time, and I is electric current. This unit is the standard SI unit in this category.
unit:FARAD_Ab
URI: http://qudt.org/vocab/unit/FARAD_Ab
An abfarad is an obsolete electromagnetic (CGS) unit of capacitance equal to \(10^{9}\) farads (1,000,000,000 F or 1 GF). The absolute farad of the e.m.u. system, for a steady current identically \(abC/abV\), and identically reciprocal abdaraf. 1 abF = 1 GF.
unit:FARAD_Ab-PER-CentiM
URI: http://qudt.org/vocab/unit/FARAD_Ab-PER-CentiM
The absolute dielectric constant of free space is defined as the ratio of displacement to the electric field intensity. The unit of measure is the abfarad per centimeter, a derived CGS unit.
unit:FARAD_Stat
URI: http://qudt.org/vocab/unit/FARAD_Stat
Statfarad (statF) is a unit in the category of Electric capacitance. It is also known as statfarads. This unit is commonly used in the cgs unit system. Statfarad (statF) has a dimension of \(M^{-1}L^{-2}T^4I^2\) where M is mass, L is length, T is time, and I is electric current. It can be converted to the corresponding standard SI unit F by multiplying its value by a factor of 1.11265E-012.
unit:FATH
URI: http://qudt.org/vocab/unit/FATH
A fathom = 1.8288 meters, is a unit of length in the imperial and the U.S. customary systems, used especially for measuring the depth of water. There are two yards in an imperial or U.S. fathom. Originally based on the distance between the man's outstretched arms, the size of a fathom has varied slightly depending on whether it was defined as a thousandth of an (Admiralty) nautical mile or as a multiple of the imperial yard. Abbreviations: f, fath, fm, fth, fthm.
unit:FBM
URI: http://qudt.org/vocab/unit/FBM
The board-foot is a specialized unit of measure for the volume of lumber in the United States and Canada. It is the volume of a one-foot length of a board one foot wide and one inch thick. Board-foot can be abbreviated FBM (for 'foot, board measure'), BDFT, or BF. Thousand board-feet can be abbreviated as MFBM, MBFT or MBF.
unit:FC
URI: http://qudt.org/vocab/unit/FC
"Foot Candle" is a unit for 'Luminous Flux Per Area' expressed as \(fc\).
unit:FM
URI: http://qudt.org/vocab/unit/FM
The \(\textit{fermi}\), or \(\textit{femtometer}\) (other spelling \(femtometre\), symbol \(fm\)) is an SI unit of length equal to \(10^{-15} metre\). This distance is often encountered in nuclear physics as a characteristic of this scale. The symbol for the fermi is also \(fm\).
unit:FR
URI: http://qudt.org/vocab/unit/FR
"Franklin" is a unit for 'Electric Charge' expressed as \(Fr\).
unit:FRAME-PER-SEC
URI: http://qudt.org/vocab/unit/FRAME-PER-SEC
"Frame per Second" is a unit for 'Video Frame Rate' expressed as \(fps\).
unit:FT
URI: http://qudt.org/vocab/unit/FT
A foot is a unit of length defined as being 0.3048 m exactly and used in the imperial system of units and United States customary units. It is subdivided into 12 inches. The foot is still officially used in Canada and still commonly used in the United Kingdom, although the latter has partially metricated its units of measurement.
unit:FT-LA
URI: http://qudt.org/vocab/unit/FT-LA
"Foot Lambert" is a C.G.S System unit for 'Luminance' expressed as \(ft-L\).
unit:FT-LB_F
URI: http://qudt.org/vocab/unit/FT-LB_F
"Foot Pound Force" is an Imperial unit for 'Energy And Work' expressed as \(ft-lbf\).
unit:FT-LB_F-PER-FT2
URI: http://qudt.org/vocab/unit/FT-LB_F-PER-FT2
"Foot Pound per Square Foot" is an Imperial unit for 'Energy Per Area' expressed as \(ft-lbf/ft^{2}\).
unit:FT-LB_F-PER-FT2-SEC
URI: http://qudt.org/vocab/unit/FT-LB_F-PER-FT2-SEC
"Foot Pound Force per Square Foot Second" is an Imperial unit for 'Power Per Area' expressed as \(ft \cdot lbf/(ft^2 \cdot s)\).
unit:FT-LB_F-PER-HR
URI: http://qudt.org/vocab/unit/FT-LB_F-PER-HR
"Foot Pound Force per Hour" is an Imperial unit for 'Power' expressed as \(ft-lbf/hr\).
unit:FT-LB_F-PER-M2
URI: http://qudt.org/vocab/unit/FT-LB_F-PER-M2
"Foot Pound Force per Square Meter" is a unit for 'Energy Per Area' expressed as \(ft-lbf/m^{2}\).
unit:FT-LB_F-PER-MIN
URI: http://qudt.org/vocab/unit/FT-LB_F-PER-MIN
"Foot Pound Force per Minute" is an Imperial unit for 'Power' expressed as \(ft-lbf/min\).
unit:FT-LB_F-PER-SEC
URI: http://qudt.org/vocab/unit/FT-LB_F-PER-SEC
"Foot Pound Force per Second" is an Imperial unit for 'Power' expressed as \(ft-lbf/s\).
unit:FT-LB_F-SEC
URI: http://qudt.org/vocab/unit/FT-LB_F-SEC
"Foot Pound Force Second" is a unit for 'Angular Momentum' expressed as \(lbf / s\).
unit:FT-PDL
URI: http://qudt.org/vocab/unit/FT-PDL
"Foot Poundal" is an Imperial unit for 'Energy And Work' expressed as \(ft-pdl\).
unit:FT-PER-DAY
URI: http://qudt.org/vocab/unit/FT-PER-DAY
"Foot per Day" is an Imperial unit for 'Linear Velocity' expressed as \(ft/d\).
unit:FT-PER-HR
URI: http://qudt.org/vocab/unit/FT-PER-HR
"Foot per Hour" is an Imperial unit for 'Linear Velocity' expressed as \(ft/hr\).
unit:FT-PER-MIN
URI: http://qudt.org/vocab/unit/FT-PER-MIN
"Foot per Minute" is an Imperial unit for 'Linear Velocity' expressed as \(ft/min\).
unit:FT-PER-SEC
URI: http://qudt.org/vocab/unit/FT-PER-SEC
\(\textit{foot per second}\) (plural \(\textit{feet per second}\)) is a unit of both speed (scalar) and velocity (vector quantity, which includes direction). It expresses the distance in feet (\(ft\)) traveled or displaced, divided by the time in seconds (\(s\), or \(sec\)). The corresponding unit in the International System of Units (SI) is the \(\textit{metre per second}\). Abbreviations include \(ft/s\), \(ft/sec\) and \(fps\), and the rarely used scientific notation \(ft\,s\).
unit:FT-PER-SEC2
URI: http://qudt.org/vocab/unit/FT-PER-SEC2
\(\textit{Foot per Square Second}\) is an Imperial unit for \(\textit{Linear Acceleration}\) expressed as \(ft/s^2\).
unit:FT2
URI: http://qudt.org/vocab/unit/FT2
The square foot (plural square feet; abbreviated \(ft^2\) or \(sq \, ft\)) is an imperial unit and U.S. customary unit of area, used mainly in the United States, Canada, United Kingdom, Hong Kong, Bangladesh, India, Pakistan and Afghanistan. It is defined as the area of a square with sides of 1 foot in length.
unit:FT2-DEG_F
URI: http://qudt.org/vocab/unit/FT2-DEG_F
\(\textbf{Square Foot Degree Fahrenheit} is an Imperial unit for 'Area Temperature' expressed as \(ft^{2}-degF\).
unit:FT2-HR-DEG_F
URI: http://qudt.org/vocab/unit/FT2-HR-DEG_F
\(\textbf{Square Foot Hour Degree Fahrenheit} is an Imperial unit for 'Area Time Temperature' expressed as \(ft^{2}-hr-degF\).
unit:FT2-HR-DEG_F-PER-BTU_IT
URI: http://qudt.org/vocab/unit/FT2-HR-DEG_F-PER-BTU_IT
\(\textbf{Square Foot Hour Degree Fahrenheit per BTU} is an Imperial unit for 'Thermal Insulance' expressed as \((degF-hr-ft^{2})/Btu\).
unit:FT2-PER-HR
URI: http://qudt.org/vocab/unit/FT2-PER-HR
\(\textbf{Square Foot per Hour} is an Imperial unit for \(\textit{Kinematic Viscosity}\) and \(\textit{Thermal Diffusivity}\) expressed as \(ft^{2}/hr\).
unit:FT2-PER-SEC
URI: http://qudt.org/vocab/unit/FT2-PER-SEC
"Square Foot per Second" is an Imperial unit for 'Kinematic Viscosity' expressed as \(ft^{2}/s\).
unit:FT2-SEC-DEG_F
URI: http://qudt.org/vocab/unit/FT2-SEC-DEG_F
\(\textbf{Square Foot Second Degree Fahrenheit} is an Imperial unit for 'Area Time Temperature' expressed as \(ft^{2}\cdot s\cdot degF\).
unit:FT3
URI: http://qudt.org/vocab/unit/FT3
The cubic foot is an Imperial and US customary unit of volume, used in the United States and the United Kingdom. It is defined as the volume of a cube with sides of one foot (0.3048 m) in length. To calculate cubic feet multiply length X width X height.
unit:FT3-PER-MIN
URI: http://qudt.org/vocab/unit/FT3-PER-MIN
"Cubic Foot per Minute" is an Imperial unit for 'Volume Per Unit Time' expressed as \(ft^3/min\).
unit:FT3-PER-SEC
URI: http://qudt.org/vocab/unit/FT3-PER-SEC
"Cubic Foot per Second" is an Imperial unit for \( \textit{Volume Per Unit Time}\) expressed as \(ft^3/s\).
unit:FT_H2O
URI: http://qudt.org/vocab/unit/FT_H2O
"Foot of Water" is a unit for 'Force Per Area' expressed as \(ftH2O\).
unit:FT_US
URI: http://qudt.org/vocab/unit/FT_US
\(\textit{US Survey Foot}\) is a unit for 'Length' expressed as \(ftUS\).
unit:FUR
URI: http://qudt.org/vocab/unit/FUR
A furlong is a measure of distance in imperial units and U.S. customary units equal to one-eighth of a mile, equivalent to 220 yards, 660 feet, 40 rods, or 10 chains. The exact value of the furlong varies slightly among English-speaking countries. Five furlongs are approximately 1 kilometre (1.0058 km is a closer approximation). Since the original definition of the metre was one-quarter of one ten-millionth of the circumference of the Earth (along the great circle coincident with the meridian of longitude passing through Paris), the circumference of the Earth is about 40,000 km or about 200,000 furlongs.
Check if this is US-Survey or International Customary definition (multiplier)
unit:FalklandIslandsPound
URI: http://qudt.org/vocab/unit/FalklandIslandsPound
Falkland Islands
unit:FemtoC
URI: http://qudt.org/vocab/unit/FemtoC
A FemtoCoulomb is \(10^{-15} C\).
unit:FemtoGM-PER-KiloGM
URI: http://qudt.org/vocab/unit/FemtoGM-PER-KiloGM
One part per 10**18 by mass of the measurand in the matrix.
unit:FemtoGM-PER-L
URI: http://qudt.org/vocab/unit/FemtoGM-PER-L
One 10**18 part of the SI standard unit of mass of the measurand per litre volume of matrix..
unit:FemtoM
URI: http://qudt.org/vocab/unit/FemtoM
The \(\textit{femtometre}\) is an SI unit of length equal to \(10^{-15} meter\). This distance can also be called \(\textit{fermi}\) and was so named in honour of Enrico Fermi. It is often encountered in nuclear physics as a characteristic of this scale. The symbol for the fermi is also \(fm\).
unit:FemtoMOL-PER-KiloGM
URI: http://qudt.org/vocab/unit/FemtoMOL-PER-KiloGM
A 10**18 part quantity of substance of the measurand per kilogram mass of matrix.
unit:FemtoMOL-PER-L
URI: http://qudt.org/vocab/unit/FemtoMOL-PER-L
A 10**18 part quantity of substance of the measurand per litre volume of matrix.
unit:FrancCongolais
URI: http://qudt.org/vocab/unit/FrancCongolais
Democratic Republic of Congo
unit:G
URI: http://qudt.org/vocab/unit/G
"Gravity" is a unit for 'Linear Acceleration' expressed as \(G\).
unit:GALILEO
URI: http://qudt.org/vocab/unit/GALILEO
The \(\textit{Galileo}\) is the unit of acceleration of free fall used extensively in the science of gravimetry. The Galileo is defined as \(1 \textit{centimeter per square second}\) (\(1 cm/s^2\)). Unfortunately, the Galileo is often denoted with the symbol Gal, not to be confused with the Gallon that also uses the same symbol.
unit:GAL_IMP
URI: http://qudt.org/vocab/unit/GAL_IMP
"Imperial Gallon" is an Imperial unit for 'Liquid Volume' expressed as \(galIMP\).
unit:GAL_US
URI: http://qudt.org/vocab/unit/GAL_US
"US Gallon" is a unit for 'Liquid Volume' expressed as \(galUS\).
unit:GAL_US-PER-DAY
URI: http://qudt.org/vocab/unit/GAL_US-PER-DAY
"US Gallon per Day" is a unit for 'Volume Per Unit Time' expressed as \(gal/d\).
unit:GAL_US-PER-MIN
URI: http://qudt.org/vocab/unit/GAL_US-PER-MIN
"US Gallon per Minute" is a C.G.S System unit for 'Volume Per Unit Time' expressed as \(gal/min\).
unit:GAL_US_DRY
URI: http://qudt.org/vocab/unit/GAL_US_DRY
"Dry Gallon US" is a unit for 'Dry Volume' expressed as \(dry_gal\).
unit:GI
URI: http://qudt.org/vocab/unit/GI
The fundamental unit of magnetomotive force (\(mmf\)) in electromagnetic units is called a Gilbert. It is the \(mmf\) which will produce a magnetic field strength of one Gauss (Maxwell per Square Centimeter) in a path one centimeter long.
unit:GM
URI: http://qudt.org/vocab/unit/GM
A unit of mass in the metric system. The name comes from the Greek gramma, a small weight identified in later Roman and Byzantine times with the Latin scripulum or scruple (the English scruple is equal to about 1.3 grams). The gram was originally defined to be the mass of one cubic centimeter of pure water, but to provide precise standards it was necessary to construct physical objects of specified mass. One gram is now defined to be 1/1000 of the mass of the standard kilogram, a platinum-iridium bar carefully guarded by the International Bureau of Weights and Measures in Paris for more than a century. (The kilogram, rather than the gram, is considered the base unit of mass in the SI.) The gram is a small mass, equal to about 15.432 grains or 0.035 273 966 ounce.
unit:GM-PER-CentiM2-YR
URI: http://qudt.org/vocab/unit/GM-PER-CentiM2-YR
A rate of change of 0.001 of the SI unit of mass over 0.00001 of the SI unit of area in a period of an average calendar year (365.25 days)
unit:GM-PER-DEG_C
URI: http://qudt.org/vocab/unit/GM-PER-DEG_C
\(\textbf{Gram Degree Celsius} is a C.G.S System unit for 'Mass Temperature' expressed as \(g \cdot degC\).
unit:GM-PER-GM
URI: http://qudt.org/vocab/unit/GM-PER-GM
mass ratio consisting of the 0.001-fold of the SI base unit kilogram divided by the 0.001-fold of the SI base unit kilogram.
unit:GON
URI: http://qudt.org/vocab/unit/GON
"Gon" is a C.G.S System unit for 'Plane Angle' expressed as \(gon\).
unit:GR
URI: http://qudt.org/vocab/unit/GR
the tangent of an angle of inclination multiplied by 100
unit:GRAD
URI: http://qudt.org/vocab/unit/GRAD
"Grad" is a unit for 'Plane Angle' expressed as \(grad\).
unit:GRAIN
URI: http://qudt.org/vocab/unit/GRAIN
A grain is a unit of measurement of mass that is nominally based upon the mass of a single seed of a cereal. The grain is the only unit of mass measure common to the three traditional English mass and weight systems; the obsolete Tower grain was, by definition, exactly /64 of a troy grain. Since 1958, the grain or troy grain measure has been defined in terms of units of mass in the International System of Units as precisely 64.79891 milligrams. Thus, \(1 gram \approx 15.4323584 grains\). There are precisely 7,000 grains per avoirdupois pound in the imperial and U.S. customary units, and 5,760 grains in the Troy pound.
unit:GRAIN-PER-GAL
URI: http://qudt.org/vocab/unit/GRAIN-PER-GAL
"Grain per Gallon" is an Imperial unit for 'Density' expressed as \(gr/gal\).
unit:GRAY
URI: http://qudt.org/vocab/unit/GRAY
The SI unit of radiation dose. Radiation carries energy, and when it is absorbed by matter the matter receives this energy. The dose is the amount of energy deposited per unit of mass. One gray is defined to be the dose of one joule of energy absorbed per kilogram of matter, or 100 rad. The unit is named for the British physician L. Harold Gray (1905-1965), an authority on the use of radiation in the treatment of cancer.
unit:GRAY-PER-SEC
URI: http://qudt.org/vocab/unit/GRAY-PER-SEC
"Gray per Second" is a unit for 'Absorbed Dose Rate' expressed as \(Gy/s\).
unit:GT
URI: http://qudt.org/vocab/unit/GT
The formula for calculating GT is given by \({ GT=V\times (0.2+0.02\times \log _{10}(V))}\)
unit:Gamma
URI: http://qudt.org/vocab/unit/Gamma
"Gamma" is a C.G.S System unit for 'Magnetic Field'.
unit:GibiBYTE
URI: http://qudt.org/vocab/unit/GibiBYTE
The gibibyte is a multiple of the unit byte for digital information storage. The prefix gibi means 1024^3
unit:GigaBYTE
URI: http://qudt.org/vocab/unit/GigaBYTE
The gigabyte is a multiple of the unit byte for digital information storage. The prefix giga means 10 in the International System of Units (SI), therefore 1 gigabyte is \(1,000,000,000 \; bytes\). The unit symbol for the gigabyte is \(GB\) or \(Gbyte\), but not \(Gb\) (lower case b) which is typically used for the gigabit. Historically, the term has also been used in some fields of computer science and information technology to denote the \(gibibyte\), or \(1073741824 \; bytes\).
unit:GigaEV
URI: http://qudt.org/vocab/unit/GigaEV
"Giga Electron Volt" is a unit for 'Energy And Work' expressed as \(GeV\).
unit:GigaHZ
URI: http://qudt.org/vocab/unit/GigaHZ
The hertz (symbol Hz) is the SI unit of frequency defined as the number of cycles per second of a periodic phenomenon. A GigaHertz is \(10^{9} hz\).
unit:GoldFranc
URI: http://qudt.org/vocab/unit/GoldFranc
Bank for International Settlements
unit:Gs
URI: http://qudt.org/vocab/unit/Gs
The gauss, abbreviated as \(G\), is the cgs unit of measurement of a magnetic field \(B\), which is also known as the "magnetic flux density" or the "magnetic induction". One gauss is defined as one maxwell per square centimeter; it equals \(10^{-4} tesla\) (or \(100 micro T\)). The Gauss is identical to maxwells per square centimetre; technically defined in a three-dimensional system, it corresponds in the SI, with its extra base unit the ampere. The gauss is quite small by earthly standards, 1 Gs being only about four times Earth's flux density, but it is subdivided, with \(1 gauss = 105 gamma\). This unit of magnetic induction is also known as the \(\textit{abtesla}\).
unit:H
URI: http://qudt.org/vocab/unit/H
The SI unit of electric inductance. A changing magnetic field induces an electric current in a loop of wire (or in a coil of many loops) located in the field. Although the induced voltage depends only on the rate at which the magnetic flux changes, measured in webers per second, the amount of the current depends also on the physical properties of the coil. A coil with an inductance of one henry requires a flux of one weber for each ampere of induced current. If, on the other hand, it is the current which changes, then the induced field will generate a potential difference within the coil: if the inductance is one henry a current change of one ampere per second generates a potential difference of one volt. The henry is a large unit; inductances in practical circuits are measured in millihenrys (mH) or microhenrys (u03bc H). The unit is named for the American physicist Joseph Henry (1797-1878), one of several scientists who discovered independently how magnetic fields can be used to generate alternating currents. \(\text{H} \; \equiv \; \text{henry}\; \equiv\; \frac{\text{Wb}}{\text{A}}\; \equiv\; \frac{\text{weber}}{\text{amp}}\; \equiv\ \frac{\text{V}\cdot\text{s}}{\text{A}}\; \equiv\; \frac{\text{volt} \cdot \text{second}}{\text{amp}}\; \equiv\ \Omega\cdot\text{s}\; \equiv\; \text{ohm.second}\)
unit:H-PER-M
URI: http://qudt.org/vocab/unit/H-PER-M
The henry per meter (symbolized \(H/m\)) is the unit of magnetic permeability in the International System of Units ( SI ). Reduced to base units in SI, \(1\,H/m\) is the equivalent of one kilogram meter per square second per square ampere.
unit:HA
URI: http://qudt.org/vocab/unit/HA
The customary metric unit of land area, equal to 100 ares. One hectare is a square hectometer, that is, the area of a square 100 meters on each side: exactly 10 000 square meters or approximately 107 639.1 square feet, 11 959.9 square yards, or 2.471 054 acres.
unit:HART
URI: http://qudt.org/vocab/unit/HART
The "Hartley" is a unit of information.
unit:HART-PER-SEC
URI: http://qudt.org/vocab/unit/HART-PER-SEC
The "Hartley per Second" is a unit of information rate.
unit:HP-PER-M
URI: http://qudt.org/vocab/unit/HP-PER-M
"Horsepower Metric" is a unit for 'Power' expressed as \(hp/m\).
unit:HP-PER-V
URI: http://qudt.org/vocab/unit/HP-PER-V
"Horsepower Electric" is a unit for 'Power' expressed as \(hp/V\).
unit:HP_Boiler
URI: http://qudt.org/vocab/unit/HP_Boiler
"Boiler Horsepower" is a unit for 'Power' expressed as \(hp_boiler\).
unit:HR
URI: http://qudt.org/vocab/unit/HR
The hour (common symbol: h or hr) is a unit of measurement of time. In modern usage, an hour comprises 60 minutes, or 3,600 seconds. It is approximately 1/24 of a mean solar day. An hour in the Universal Coordinated Time (UTC) time standard can include a negative or positive leap second, and may therefore have a duration of 3,599 or 3,601 seconds for adjustment purposes. Although it is not a standard defined by the International System of Units, the hour is a unit accepted for use with SI, represented by the symbol h.
unit:HR-FT2
URI: http://qudt.org/vocab/unit/HR-FT2
"Hour Square Foot" is an Imperial unit for 'Area Time' expressed as \(hr-ft^{2}\).
unit:HR_Sidereal
URI: http://qudt.org/vocab/unit/HR_Sidereal
Sidereal time is a time-keeping system astronomers use to keep track of the direction to point their telescopes to view a given star in the night sky. A mean sidereal day is about 23 h 56 m 4.1 s in length. However, due to variations in the rotation rate of the Earth, the rate of an ideal sidereal clock deviates from any simple multiple of a civil clock. In practice, the difference is kept track of by the difference UTC-UT1, which is measured by radio telescopes and kept on file and available to the public at the IERS and at the United States Naval Observatory. A Sidereal Hour is \(1/24^{th}\) of a Sidereal Day. A mean sidereal day is 23 hours, 56 minutes, 4.0916 seconds (23.9344699 hours or 0.99726958 mean solar days), the time it takes Earth to make one rotation relative to the vernal equinox. (Due to nutation, an actual sidereal day is not quite so constant.) The vernal equinox itself precesses slowly westward relative to the fixed stars, completing one revolution in about 26,000 years, so the misnamed sidereal day ("sidereal" is derived from the Latin sidus meaning "star") is 0.0084 seconds shorter than Earth's period of rotation relative to the fixed stars.
unit:HZ
URI: http://qudt.org/vocab/unit/HZ
The hertz (symbol Hz) is the SI unit of frequency defined as the number of cycles per second of a periodic phenomenon. One of its most common uses is the description of the sine wave, particularly those used in radio and audio applications, such as the frequency of musical tones. The word "hertz" is named for Heinrich Rudolf Hertz, who was the first to conclusively prove the existence of electromagnetic waves.
unit:HZ-PER-K
URI: http://qudt.org/vocab/unit/HZ-PER-K
\(\textbf{Hertz per Kelvin} is a unit for 'Inverse Time Temperature' expressed as \(Hz K^{-1}\).
unit:HZ-PER-T
URI: http://qudt.org/vocab/unit/HZ-PER-T
"Hertz per Tesla" is a unit for 'Electric Charge Per Mass' expressed as \(Hz T^{-1}\).
unit:HZ-PER-V
URI: http://qudt.org/vocab/unit/HZ-PER-V
In the Hertz per Volt standard the frequency of the note is directly related to the voltage. A pitch of a note goes up one octave when its frequency doubles, meaning that the voltage will have to double for every octave rise. Depending on the footage (octave) selected, nominally one volt gives 1000Hz, two volts 2000Hz and so on. In terms of notes, bottom C would be 0.25 volts, the next C up would be 0.5 volts, then 1V, 2V, 4V, 8V for the following octaves. This system was used mainly by Yamaha and Korg.
unit:H_Ab
URI: http://qudt.org/vocab/unit/H_Ab
Abhenry is the centimeter-gram-second electromagnetic unit of inductance, equal to one billionth of a henry.
unit:H_Stat
URI: http://qudt.org/vocab/unit/H_Stat
"Stathenry" (statH) is a unit in the category of Electric inductance. It is also known as stathenries. This unit is commonly used in the cgs unit system. Stathenry (statH) has a dimension of \(ML^2T^{-2}I^{-2}\) where M is mass, L is length, T is time, and I is electric current. It can be converted to the corresponding standard SI unit H by multiplying its value by a factor of \(8.987552 \times 10^{11}\) .
unit:H_Stat-PER-CentiM
URI: http://qudt.org/vocab/unit/H_Stat-PER-CentiM
The Stathenry per Centimeter is a unit of measure for the absolute permeability of free space.
unit:HectoC
URI: http://qudt.org/vocab/unit/HectoC
"HectoCoulomb" is a unit for 'Electric Charge' expressed as \(hC\).
unit:HectoPA
URI: http://qudt.org/vocab/unit/HectoPA
Hectopascal is a unit of pressure. 1 Pa is approximately the pressure exerted by a 10-g mass resting on a 1-cm2 area. 1013 hPa = 1 atm. There are 100 pascals in 1 hectopascal.
Hectopascal is commonly used in meteorology to report values for atmospheric pressure. It is equivalent to millibar.
unit:HectoPA-PER-HR
URI: http://qudt.org/vocab/unit/HectoPA-PER-HR
A change in pressure of one hundred Newtons per square metre (100 Pascals) per hour. Equivalent to a change of one millibar per hour.
unit:HongKongDollar
URI: http://qudt.org/vocab/unit/HongKongDollar
Hong Kong Special Administrative Region
unit:IN
URI: http://qudt.org/vocab/unit/IN
An inch is the name of a unit of length in a number of different systems, including Imperial units, and United States customary units. There are 36 inches in a yard and 12 inches in a foot. Corresponding units of area and volume are the square inch and the cubic inch.
unit:IN-PER-SEC
URI: http://qudt.org/vocab/unit/IN-PER-SEC
The inch per second is a unit of speed or velocity. It expresses the distance in inches (in) traveled or displaced, divided by time in seconds (s, or sec). The equivalent SI unit is the metre per second. Abbreviations include in/s, in/sec, ips, and less frequently in s.
unit:IN-PER-SEC2
URI: http://qudt.org/vocab/unit/IN-PER-SEC2
\(\textit{Inch per Square second}\) is an Imperial unit for \(\textit{Linear Acceleration}\) expressed as \(in/s^2\).
unit:IN2
URI: http://qudt.org/vocab/unit/IN2
A square inch is a unit of area, equal to the area of a square with sides of one inch. The following symbols are used to denote square inches: square in, sq inches, sq inch, sq in inches/-2, inch/-2, in/-2, inches^2, \(inch^2\), \(in^2\), \(inches^2\), \(inch^2\), \(in^2\) or in some cases \("^2\). The square inch is a common unit of measurement in the United States and the United Kingdom.
unit:IN3
URI: http://qudt.org/vocab/unit/IN3
The cubic inch is a unit of measurement for volume in the Imperial units and United States customary units systems. It is the volume of a cube with each of its three sides being one inch long. The cubic inch and the cubic foot are still used as units of volume in the United States, although the common SI units of volume, the liter, milliliter, and cubic meter, are continually replacing them, especially in manufacturing and high technology. One cubic foot is equal to exactly 1728 cubic inches.
unit:IN3-PER-MIN
URI: http://qudt.org/vocab/unit/IN3-PER-MIN
"Cubic Inch per Minute" is an Imperial unit for 'Volume Per Unit Time' expressed as \(in^{3}/min\).
unit:IN_H2O
URI: http://qudt.org/vocab/unit/IN_H2O
Inches of water, wc, inch water column (inch WC), inAq, Aq, or inH2O is a non-SI unit for pressure. The units are by convention and due to the historical measurement of certain pressure differentials. It is used for measuring small pressure differences across an orifice, or in a pipeline or shaft. Inches of water can be converted to a pressure unit using the formula for pressure head. It is defined as the pressure exerted by a column of water of 1 inch in height at defined conditions for example \(39 ^\circ F\) at the standard acceleration of gravity; 1 inAq is approximately equal to 249 pascals at \(0 ^\circ C\).
unit:IN_HG
URI: http://qudt.org/vocab/unit/IN_HG
Inches of mercury, (inHg) is a unit of measurement for pressure. It is still widely used for barometric pressure in weather reports, refrigeration and aviation in the United States, but is seldom used elsewhere. It is defined as the pressure exerted by a column of mercury of 1 inch in height at \(32 ^\circ F\) at the standard acceleration of gravity. 1 inHg = 3,386.389 pascals at \(0 ^\circ C\).
unit:IU
URI: http://qudt.org/vocab/unit/IU
International Unit is a unit for \textit{'Amount Of Substance'} expressed as \(IU\)
.unit:IU-PER-L
URI: http://qudt.org/vocab/unit/IU-PER-L
"International Unit per Liter" is a unit for 'Serum Or Plasma Level' expressed as \(IU/L\).
unit:J
URI: http://qudt.org/vocab/unit/J
The SI unit of work or energy, defined to be the work done by a force of one newton acting to move an object through a distance of one meter in the direction in which the force is applied. Equivalently, since kinetic energy is one half the mass times the square of the velocity, one joule is the kinetic energy of a mass of two kilograms moving at a velocity of \(1 m/s\).
unit:J-M-PER-MOL
URI: http://qudt.org/vocab/unit/J-M-PER-MOL
\(\textbf{Joule Meter per Mole} is a unit for 'Length Molar Energy' expressed as \(J \cdot m \cdot mol^{-1}\).
unit:J-PER-CentiM2-DAY
URI: http://qudt.org/vocab/unit/J-PER-CentiM2-DAY
Radiant energy per 10^-4 SI unit area over a period of one day.
unit:J-PER-K
URI: http://qudt.org/vocab/unit/J-PER-K
Joule Per Kelvin (J/K) is a unit in the category of Entropy. It is also known as joules per kelvin, joule/kelvin. This unit is commonly used in the SI unit system. Joule Per Kelvin (J/K) has a dimension of \(ML^{2}T^{-2}Q^{-1}\( where \(M\) is mass, L is length, T is time, and Q is temperature. This unit is the standard SI unit in this category.
unit:J-PER-KiloGM
URI: http://qudt.org/vocab/unit/J-PER-KiloGM
Joule Per Kilogram} (\(J/kg\)) is a unit in the category of Thermal heat capacity. It is also known as \textit{joule/kilogram}, \textit{joules per kilogram}. This unit is commonly used in the SI unit system. The unit has a dimension of \(L2T^{-2}\) where \(L\) is length, and \(T\) is time. This unit is the standard SI unit in this category.
unit:J-PER-KiloGM-K
URI: http://qudt.org/vocab/unit/J-PER-KiloGM-K
Specific heat capacity - The heat required to raise unit mass of a substance by unit temperature interval under specified conditions, such as constant pressure: usually measured in joules per kelvin per kilogram. Symbol \(c_p\) (for constant pressure) Also called specific heat.
unit:J-PER-M2
URI: http://qudt.org/vocab/unit/J-PER-M2
Joule Per Square Meter (\(J/m^2\)) is a unit in the category of Energy density. It is also known as joules per square meter, joule per square metre, joule/square meter, joule/square metre. This unit is commonly used in the SI unit system.
unit:J-PER-M3
URI: http://qudt.org/vocab/unit/J-PER-M3
\(\textit{Joule Per Cubic Meter}\) (\(J/m^{3}\)) is a unit in the category of Energy density. It is also known as joules per cubic meter, joule per cubic metre, joules per cubic metre, joule/cubic meter, joule/cubic metre. This unit is commonly used in the SI unit system. It has a dimension of \(ML^{-1}T^{-2}\) where \(M\) is mass, \(L\) is length, and \(T\) is time. This unit is the standard SI unit in this category.
unit:J-PER-M3-K
URI: http://qudt.org/vocab/unit/J-PER-M3-K
\(\textbf{Joule per Cubic Meter Kelvin} is a unit for 'Volumetric Heat Capacity' expressed as \(J/(m^{3} K)\).
unit:J-PER-M4
URI: http://qudt.org/vocab/unit/J-PER-M4
\(\textbf{Joule Per Quartic Meter} (\(J/m^4\)) is a unit for the spectral concentration of radiant energy density (in terms of wavelength), or the spectral radiant energy density (in terms of wave length). This unit is commonly used in the SI unit system.
unit:J-PER-MOL
URI: http://qudt.org/vocab/unit/J-PER-MOL
The joule per mole (symbol: \(J\cdot mol^{-1}\)) is an SI derived unit of energy per amount of material. Energy is measured in joules, and the amount of material is measured in moles. Physical quantities measured in \(J\cdot mol^{-1}\)) usually describe quantities of energy transferred during phase transformations or chemical reactions. Division by the number of moles facilitates comparison between processes involving different quantities of material and between similar processes involving different types of materials. The meaning of such a quantity is always context-dependent and, particularly for chemical reactions, is dependent on the (possibly arbitrary) definition of a 'mole' for a particular process.
unit:J-PER-MOL-K
URI: http://qudt.org/vocab/unit/J-PER-MOL-K
Energy needed to heat one mole of substance by 1 Kelvin, under standard conditions (not standard temperature and pressure STP). The standard molar entropy is usually given the symbol S, and has units of joules per mole kelvin ( \( J\cdot mol^{-1} K^{-1}\)). Unlike standard enthalpies of formation, the value of S is an absolute. That is, an element in its standard state has a nonzero value of S at room temperature.
unit:J-PER-T
URI: http://qudt.org/vocab/unit/J-PER-T
The magnetic moment of a magnet is a quantity that determines the force that the magnet can exert on electric currents and the torque that a magnetic field will exert on it. A loop of electric current, a bar magnet, an electron, a molecule, and a planet all have magnetic moments. The unit for magnetic moment is not a base unit in the International System of Units (SI) and it can be represented in more than one way. For example, in the current loop definition, the area is measured in square meters and I is measured in amperes, so the magnetic moment is measured in ampere-square meters (A m2). In the equation for torque on a moment, the torque is measured in joules and the magnetic field in tesla, so the moment is measured in Joules per Tesla (J u00b7T-1). These two representations are equivalent: 1 A u00b7m2 = 1 J u00b7T-1.
unit:J-PER-T2
URI: http://qudt.org/vocab/unit/J-PER-T2
A measure of the diamagnetic energy, for a Bohr-radius spread around a magnetic axis, per square Tesla.
unit:J-SEC
URI: http://qudt.org/vocab/unit/J-SEC
\(The joule-second is a unit equal to a joule multiplied by a second, used to measure action or angular momentum. The joule-second is the unit used for Planck's constant.\)
unit:J-SEC-PER-MOL
URI: http://qudt.org/vocab/unit/J-SEC-PER-MOL
\(\textbf{Joule Second per Mole} is a unit for 'Molar Angular Momentum' expressed as \(J s mol^{-1}\).
unit:K
URI: http://qudt.org/vocab/unit/K
\(The SI base unit of temperature, previously called the degree Kelvin. One kelvin represents the same temperature difference as one degree Celsius. In 1967 the General Conference on Weights and Measures defined the temperature of the triple point of water (the temperature at which water exists simultaneously in the gaseous, liquid, and solid states) to be exactly 273.16 kelvins. Since this temperature is also equal to 0.01 u00b0C, the temperature in kelvins is always equal to 273.15 plus the temperature in degrees Celsius. The kelvin equals exactly 1.8 degrees Fahrenheit. The unit is named for the British mathematician and physicist William Thomson (1824-1907), later known as Lord Kelvin after he was named Baron Kelvin of Largs.\)
unit:K-M2-PER-KiloGM-SEC
URI: http://qudt.org/vocab/unit/K-M2-PER-KiloGM-SEC
Unavailable
unit:K-PER-HR
URI: http://qudt.org/vocab/unit/K-PER-HR
\(\textbf{Kelvin per Hour} is a unit for 'Temperature Per Time' expressed as \(K / h\).
unit:K-PER-M
URI: http://qudt.org/vocab/unit/K-PER-M
A change of temperature on the Kelvin temperature scale in one SI unit of length.
unit:K-PER-MIN
URI: http://qudt.org/vocab/unit/K-PER-MIN
\(\textbf{Kelvin per Minute} is a unit for 'Temperature Per Time' expressed as \(K / m\).
unit:K-PER-SEC
URI: http://qudt.org/vocab/unit/K-PER-SEC
\(\textbf{Kelvin per Second} is a unit for 'Temperature Per Time' expressed as \(K / s\).
unit:K-PER-T
URI: http://qudt.org/vocab/unit/K-PER-T
\(\textbf{Kelvin per Tesla} is a unit for 'Temperature Per Magnetic Flux Density' expressed as \(K T^{-1}\).
unit:K-PER-W
URI: http://qudt.org/vocab/unit/K-PER-W
Thermal resistance is a heat property and a measure of a temperature difference by which an object or material resists a heat flow (heat per time unit or thermal resistance). Thermal resistance is the reciprocal thermal conductance. Absolute thermal resistance is the temperature difference across a structure when a unit of heat energy flows through it in unit time. It is the reciprocal of thermal conductance. The SI units of thermal resistance are kelvins per watt or the equivalent degrees Celsius per watt (the two are the same since as intervals).
unit:KAT
URI: http://qudt.org/vocab/unit/KAT
A unit of catalytic activity used especially in the chemistry of enzymes. A catalyst is a substance that starts or speeds a chemical reaction. Enzymes are proteins that act as catalysts within the bodies of living plants and animals. A catalyst has an activity of one katal if it enables a reaction to proceed at the rate of one mole per second.
unit:KIP_F-PER-IN2
URI: http://qudt.org/vocab/unit/KIP_F-PER-IN2
"Kip per Square Inch" is a unit for 'Force Per Area' expressed as \(kip/in^{2}\).
unit:KN
URI: http://qudt.org/vocab/unit/KN
The knot (pronounced 'not') is a unit of speed equal to one nautical mile (1.852 km) per hour, approximately 1.151 mph. The abbreviation \(kn\) is preferred by the International Hydrographic Organization (IHO), which includes every major sea-faring nation; however, the abbreviations kt (singular) and kts (plural) are also widely used. However, use of the abbreviation kt for knot conflicts with the SI symbol for kilotonne. The knot is a non-SI unit accepted for use with the International System of Units (SI). Worldwide, the knot is used in meteorology, and in maritime and air navigation - for example, a vessel travelling at 1 knot along a meridian travels one minute of geographic latitude in one hour. Etymologically, the term knot derives from counting the number of knots in the line that unspooled from the reel of a chip log in a specific time.
unit:KN-PER-SEC
URI: http://qudt.org/vocab/unit/KN-PER-SEC
\(\textit{Knot per Second}\) is a unit for 'Linear Acceleration' expressed as \(kt/s\).
unit:KibiBYTE
URI: http://qudt.org/vocab/unit/KibiBYTE
The kibibyte is a multiple of the unit byte for digital information equivalent to 1024 bytes.
unit:KiloBAR
URI: http://qudt.org/vocab/unit/KiloBAR
The bar is a non-SI unit of pressure, defined by the IUPAC as exactly equal to 100,000 Pa. It is about equal to the atmospheric pressure on Earth at sea level, and since 1982 the IUPAC has recommended that the standard for atmospheric pressure should be harmonized to \(100,000 Pa = 1 bar \approx 750.0616827 Torr\). Units derived from the bar are the megabar (symbol: Mbar), kilobar (symbol: kbar), decibar (symbol: dbar), centibar (symbol: cbar), and millibar (symbol: mbar or mb). They are not SI or cgs units, but they are accepted for use with the SI.
unit:KiloBIT-PER-SEC
URI: http://qudt.org/vocab/unit/KiloBIT-PER-SEC
A kilobit per second (kB/s) is a unit of data transfer rate equal to 1,000 bits per second.
unit:KiloBYTE
URI: http://qudt.org/vocab/unit/KiloBYTE
The kilobyte is a multiple of the unit byte for digital information equivalent to 1024 bytes. Although the prefix kilo- means 1000, the term kilobyte and symbol kB have historically been used to refer to either 1024 (210) bytes or 1000 (103) bytes, dependent upon context, in the fields of computer science and information technology.
unit:KiloBYTE-PER-SEC
URI: http://qudt.org/vocab/unit/KiloBYTE-PER-SEC
A kilobyte per second (kByte/s) is a unit of data transfer rate equal to 1024 bytes per second or 8096 bits per second.
unit:KiloCAL
URI: http://qudt.org/vocab/unit/KiloCAL
\(\textbf{Kilocalorie} is a unit for \textit{Energy And Work} expressed as \(kcal\).
unit:KiloCAL-PER-CentiM-SEC-DEG_C
URI: http://qudt.org/vocab/unit/KiloCAL-PER-CentiM-SEC-DEG_C
unit:KiloCAL-PER-CentiM2
URI: http://qudt.org/vocab/unit/KiloCAL-PER-CentiM2
"Kilocalorie per Square Centimeter" is a unit for 'Energy Per Area' expressed as \(kcal/cm^{2}\).
unit:KiloCAL-PER-CentiM2-MIN
URI: http://qudt.org/vocab/unit/KiloCAL-PER-CentiM2-MIN
"Kilocalorie per Square Centimeter Minute" is a unit for 'Power Per Area' expressed as \(kcal/(cm^{2}-min)\).
unit:KiloCAL-PER-CentiM2-SEC
URI: http://qudt.org/vocab/unit/KiloCAL-PER-CentiM2-SEC
"Kilocalorie per Square Centimeter Second" is a unit for 'Power Per Area' expressed as \(kcal/(cm^{2}-s)\).
unit:KiloCAL-PER-GM
URI: http://qudt.org/vocab/unit/KiloCAL-PER-GM
"Kilocalorie per Gram" is a unit for 'Specific Energy' expressed as \(kcal/gm\).
unit:KiloCAL-PER-GM-DEG_C
URI: http://qudt.org/vocab/unit/KiloCAL-PER-GM-DEG_C
\(\textbf{Calorie per Gram Degree Celsius} is a unit for 'Specific Heat Capacity' expressed as \(kcal/(gm-degC)\).
unit:KiloCAL-PER-MIN
URI: http://qudt.org/vocab/unit/KiloCAL-PER-MIN
\(\textbf{Kilocalorie per Minute} is a unit for \textit{Heat Flow Rate} and \textit{Power} expressed as \(kcal/min\).
unit:KiloCAL-PER-MOL
URI: http://qudt.org/vocab/unit/KiloCAL-PER-MOL
The kilocalorie per mole is a derived unit of energy per Avogadro's number of particles. It is the quotient of a kilocalorie (1000 thermochemical gram calories) and a mole, mainly used in the United States. In SI units, it is equal to \(4.184 kJ/mol\), or \(6.9477 \times 10 J per molecule\). At room temperature it is equal to 1.688 . Physical quantities measured in \(kcal\cdot mol\) are usually thermodynamical quantities; mostly free energies such as: Heat of vaporization Heat of fusion
.unit:KiloCAL-PER-MOL-DEG_C
URI: http://qudt.org/vocab/unit/KiloCAL-PER-MOL-DEG_C
\(\textbf{Kilocalorie per Mole Degree Celsius} is a unit for 'Molar Heat Capacity' expressed as \(kcal/(mol-degC)\).
unit:KiloCAL-PER-SEC
URI: http://qudt.org/vocab/unit/KiloCAL-PER-SEC
\(\textbf{Kilocalorie per Second} is a unit for \textit{Heat Flow Rate} and \textit{Power} expressed as \(kcal/s\).
unit:KiloCAL_IT-PER-HR-M-DEG_C
URI: http://qudt.org/vocab/unit/KiloCAL_IT-PER-HR-M-DEG_C
unit:KiloEV
URI: http://qudt.org/vocab/unit/KiloEV
"Kilo Electron Volt" is a unit for 'Energy And Work' expressed as \(keV\).
unit:KiloEV-PER-MicroM
URI: http://qudt.org/vocab/unit/KiloEV-PER-MicroM
"Kilo Electron Volt per Micrometer" is a unit for 'Linear Energy Transfer' expressed as \(keV/microM\).
unit:KiloGM-K
URI: http://qudt.org/vocab/unit/KiloGM-K
\(\textbf{Kilogram Kelvin} is a unit for 'Mass Temperature' expressed as \(kg-K\).
unit:KiloGM-M-PER-SEC
URI: http://qudt.org/vocab/unit/KiloGM-M-PER-SEC
"Kilogram Meter Per Second" is a unit for 'Linear Momentum' expressed as \(kg-m/s\).
unit:KiloGM-M2
URI: http://qudt.org/vocab/unit/KiloGM-M2
"Kilogram Square Meter" is a unit for 'Moment Of Inertia' expressed as \(kg-m^2\).
unit:KiloGM-M2-PER-SEC
URI: http://qudt.org/vocab/unit/KiloGM-M2-PER-SEC
"Kilogram Square Meter Per Second" is a unit for 'Angular Momentum' expressed as \(kg-m^2-s^{-1}\).
unit:KiloGM-PER-HA
URI: http://qudt.org/vocab/unit/KiloGM-PER-HA
Kilogram Per Hectare is a unit of mass per area. Kilogram Per Hectare (kg/ha) has a dimension of ML-2 where M is mass, and L is length. It can be converted to the corresponding standard SI unit kg/m2 by multiplying its value by a factor of 0.0001.
unit:KiloGM-PER-HR
URI: http://qudt.org/vocab/unit/KiloGM-PER-HR
Kilogram Per Hour (kg/h) is a unit in the category of Mass flow rate. It is also known as kilogram/hour. Kilogram Per Hour (kg/h) has a dimension of MT-1 where M is mass, and T is time. It can be converted to the corresponding standard SI unit kg/s by multiplying its value by a factor of 0.000277777777778.
unit:KiloGM-PER-KiloM2
URI: http://qudt.org/vocab/unit/KiloGM-PER-KiloM2
One SI standard unit of mass over the square of one thousand standard unit of length.
unit:KiloGM-PER-M
URI: http://qudt.org/vocab/unit/KiloGM-PER-M
Kilogram Per Meter (kg/m) is a unit in the category of Linear mass density. It is also known as kilogram/meter, kilogram/metre, kilograms per meter, kilogram per metre, kilograms per metre. This unit is commonly used in the SI unit system. Kilogram Per Meter (kg/m) has a dimension of ML-1 where M is mass, and L is length. This unit is the standard SI unit in this category.
unit:KiloGM-PER-M-HR
URI: http://qudt.org/vocab/unit/KiloGM-PER-M-HR
One SI standard unit of mass over one SI standard unit of length over 3600 times one SI standard unit of time.
unit:KiloGM-PER-M-SEC2
URI: http://qudt.org/vocab/unit/KiloGM-PER-M-SEC2
The SI unit of pressure. The pascal is the standard pressure unit in the MKS metric system, equal to one newton per square meter or one "kilogram per meter per second per second." The unit is named for Blaise Pascal (1623-1662), French philosopher and mathematician, who was the first person to use a barometer to measure differences in altitude.
unit:KiloGM-PER-M2
URI: http://qudt.org/vocab/unit/KiloGM-PER-M2
Kilogram Per Square Meter (kg/m2) is a unit in the category of Surface density. It is also known as kilograms per square meter, kilogram per square metre, kilograms per square metre, kilogram/square meter, kilogram/square metre. This unit is commonly used in the SI unit system. Kilogram Per Square Meter (kg/m2) has a dimension of ML-2 where M is mass, and L is length. This unit is the standard SI unit in this category.
unit:KiloGM-PER-M2-SEC
URI: http://qudt.org/vocab/unit/KiloGM-PER-M2-SEC
Unavailable
unit:KiloGM-PER-M3
URI: http://qudt.org/vocab/unit/KiloGM-PER-M3
Kilogram per cubic metre is an SI derived unit of density, defined by mass in kilograms divided by volume in cubic metres. The official SI symbolic abbreviation is \(kg \cdot m^{-3}\), or equivalently either \(kg/m^3\).
unit:KiloGM-PER-M3-SEC
URI: http://qudt.org/vocab/unit/KiloGM-PER-M3-SEC
Unavailable
unit:KiloGM-PER-MOL
URI: http://qudt.org/vocab/unit/KiloGM-PER-MOL
In chemistry, the molar mass M is defined as the mass of a given substance (chemical element or chemical compound) divided by its amount of substance. It is a physical property of a given substance. The base SI unit for molar mass is \(kg/mol\). However, for historical reasons, molar masses are almost always expressed in \(g/mol\). As an example, the molar mass of water is approximately: \(18.01528(33) \; g/mol\)
.unit:KiloGM-PER-SEC
URI: http://qudt.org/vocab/unit/KiloGM-PER-SEC
Kilogram Per Second (kg/s) is a unit in the category of Mass flow rate. It is also known as kilogram/second, kilograms per second. This unit is commonly used in the SI unit system. Kilogram Per Second (kg/s) has a dimension of \(MT^{-1}\) where M is mass, and T is time. This unit is the standard SI unit in this category.
unit:KiloGM_F
URI: http://qudt.org/vocab/unit/KiloGM_F
"Kilogram Force" is a unit for 'Force' expressed as \(kgf\).
unit:KiloGM_F-PER-CentiM2
URI: http://qudt.org/vocab/unit/KiloGM_F-PER-CentiM2
"Kilogram Force per Square Centimeter" is a unit for 'Force Per Area' expressed as \(kgf/cm^{2}\).
unit:KiloHZ
URI: http://qudt.org/vocab/unit/KiloHZ
"Kilohertz" is a C.G.S System unit for 'Frequency' expressed as \(KHz\).
unit:KiloM
URI: http://qudt.org/vocab/unit/KiloM
A common metric unit of length or distance. One kilometer equals exactly 1000 meters, about 0.621 371 19 mile, 1093.6133 yards, or 3280.8399 feet. Oddly, higher multiples of the meter are rarely used; even the distances to the farthest galaxies are usually measured in kilometers.
unit:KiloM-PER-DAY
URI: http://qudt.org/vocab/unit/KiloM-PER-DAY
A change in location of a distance of one thousand metres in an elapsed time of one day (86400 seconds).
unit:KiloM-PER-HR
URI: http://qudt.org/vocab/unit/KiloM-PER-HR
"Kilometer per Hour" is a C.G.S System unit for 'Linear Velocity' expressed as \(km/hr\).
unit:KiloM-PER-SEC
URI: http://qudt.org/vocab/unit/KiloM-PER-SEC
"Kilometer per Second" is a C.G.S System unit for 'Linear Velocity' expressed as \(km/s\).
unit:KiloM3-PER-SEC2
URI: http://qudt.org/vocab/unit/KiloM3-PER-SEC2
\(\textit{Cubic Kilometer per Square Second}\) is a unit for \(\textit{Standard Gravitational Parameter}\) expressed as \(km^3/s^2\).
unit:KiloMOL-PER-KiloGM
URI: http://qudt.org/vocab/unit/KiloMOL-PER-KiloGM
Kilomole Per Kilogram (\(kmol/kg\)) is a unit of Molality
unit:KiloPA
URI: http://qudt.org/vocab/unit/KiloPA
Kilopascal is a unit of pressure. 1 kPa is approximately the pressure exerted by a 10-g mass resting on a 1-cm2 area. 101.3 kPa = 1 atm. There are 1,000 pascals in 1 kilopascal.
unit:KiloPA_A
URI: http://qudt.org/vocab/unit/KiloPA_A
\(\textbf{Kilopascal Absolute} is a SI System unit for 'Force Per Area' expressed as \(KPaA\).
unit:KiloSEC
URI: http://qudt.org/vocab/unit/KiloSEC
"Killosecond" is an Imperial unit for 'Time' expressed as \(ks\).
unit:KiloW
URI: http://qudt.org/vocab/unit/KiloW
\(The kilowatt is a derived unit of power in the International System of Units (SI), The unit, defined as 1,000 joule per second, measures the rate of energy conversion or transfer.\)
unit:KiloW-HR
URI: http://qudt.org/vocab/unit/KiloW-HR
The kilowatt hour, or kilowatt-hour, (symbol \(kW \cdot h\), \(kW h\) or \(kWh\)) is a unit of energy equal to 1000 watt hours or 3.6 megajoules. For constant power, energy in watt hours is the product of power in watts and time in hours. The kilowatt hour is most commonly known as a billing unit for energy delivered to consumers by electric utilities.
unit:L
URI: http://qudt.org/vocab/unit/L
The \(litre\) (American spelling: \(\textit{liter}\); SI symbol \(l\) or \(L\)) is a non-SI metric system unit of volume equal to \(1 \textit{cubic decimetre}\) (\(dm^3\)), 1,000 cubic centimetres (\(cm^3\)) or \(1/1000 \textit{cubic metre}\). If the lower case "L" is used as the symbol, it is sometimes rendered as a cursive "l" to help distinguish it from the capital "I", although this usage has no official approval by any international bureau.
unit:L-PER-MicroMOL
URI: http://qudt.org/vocab/unit/L-PER-MicroMOL
The inverse of a molar concentration - the untits of per molarity.
unit:LA
URI: http://qudt.org/vocab/unit/LA
The lambert (symbol \(L\), \(la\) or \(Lb\)) is a non-SI unit of luminance. A related unit of luminance, the foot-lambert, is used in the lighting, cinema and flight simulation industries. The SI unit is the candela per square metre (\(cd/m^2\)).
unit:LB
URI: http://qudt.org/vocab/unit/LB
A pound of mass, based on the international standard definition of the pound as exactly 0.45359237 kg.
unit:LB-DEG_F
URI: http://qudt.org/vocab/unit/LB-DEG_F
\(\textbf{Pound Degree Fahrenheit} is an Imperial unit for 'Mass Temperature' expressed as \(lb-degF\).
unit:LB-DEG_R
URI: http://qudt.org/vocab/unit/LB-DEG_R
\(\textbf{Pound Degree Rankine} is an Imperial unit for 'Mass Temperature' expressed as \(lb-degR\).
unit:LB-MOL
URI: http://qudt.org/vocab/unit/LB-MOL
Pound Mole is a unit for \textit{'Mass Amount Of Substance'} expressed as \(lb-mol\).
.unit:LB-MOL-DEG_F
URI: http://qudt.org/vocab/unit/LB-MOL-DEG_F
\(\textbf{Pound Mole Degree Fahrenheit} is a unit for 'Mass Amount Of Substance Temperature' expressed as \(lb-mol-degF\).
unit:LB-PER-FT
URI: http://qudt.org/vocab/unit/LB-PER-FT
"Pound per Foot" is an Imperial unit for 'Mass Per Length' expressed as \(lb/ft\).
unit:LB-PER-FT-HR
URI: http://qudt.org/vocab/unit/LB-PER-FT-HR
"Pound per Foot Hour" is an Imperial unit for 'Dynamic Viscosity' expressed as \(lb/(ft-hr)\).
unit:LB-PER-FT-SEC
URI: http://qudt.org/vocab/unit/LB-PER-FT-SEC
"Pound per Foot Second" is an Imperial unit for 'Dynamic Viscosity' expressed as \(lb/(ft-s)\).
unit:LB-PER-FT3
URI: http://qudt.org/vocab/unit/LB-PER-FT3
"Pound per Cubic Foot" is an Imperial unit for 'Density' expressed as \(lb/ft^{3}\).
unit:LB-PER-GAL
URI: http://qudt.org/vocab/unit/LB-PER-GAL
"Pound per Gallon" is an Imperial unit for 'Density' expressed as \(lb/gal\).
unit:LB-PER-HR
URI: http://qudt.org/vocab/unit/LB-PER-HR
Pound per hour is a mass flow unit. It is abbreviated as PPH or more conventionally as lb/h. Fuel flow for engines is usually expressed using this unit, it is particularly useful when dealing with gases or liquids as volume flow varies more with temperature and pressure. \(1 lb/h = 0.4535927 kg/h = 126.00 mg/s\). Minimum fuel intake on a jumbojet can be as low as 150 lb/h when idling, however this is not enough to sustain flight.
unit:LB-PER-IN
URI: http://qudt.org/vocab/unit/LB-PER-IN
"Pound per Inch" is an Imperial unit for 'Mass Per Length' expressed as \(lb/in\).
unit:LB-PER-IN3
URI: http://qudt.org/vocab/unit/LB-PER-IN3
"Pound per Cubic Inch" is an Imperial unit for 'Density' expressed as \(lb/in^{3}\).
unit:LB-PER-M3
URI: http://qudt.org/vocab/unit/LB-PER-M3
"Pound per Cubic Meter" is a unit for 'Density' expressed as \(lb/m^{3}\).
unit:LB-PER-MIN
URI: http://qudt.org/vocab/unit/LB-PER-MIN
"Pound per Minute" is an Imperial unit for 'Mass Per Time' expressed as \(lb/min\).
unit:LB-PER-YD3
URI: http://qudt.org/vocab/unit/LB-PER-YD3
"Pound per Cubic Yard" is an Imperial unit for 'Density' expressed as \(lb/yd^{3}\).
unit:LB_F
URI: http://qudt.org/vocab/unit/LB_F
"Pound Force" is an Imperial unit for 'Force' expressed as \(lbf\).
unit:LB_F-FT
URI: http://qudt.org/vocab/unit/LB_F-FT
"Pound Force Foot" is an Imperial unit for 'Torque' expressed as \(lbf-ft\).
unit:LB_F-IN
URI: http://qudt.org/vocab/unit/LB_F-IN
"Pound Force Inch" is an Imperial unit for 'Torque' expressed as \(lbf-in\).
unit:LB_F-PER-FT
URI: http://qudt.org/vocab/unit/LB_F-PER-FT
"Pound Force per Foot" is an Imperial unit for 'Force Per Length' expressed as \(lbf/ft\).
unit:LB_F-PER-FT2
URI: http://qudt.org/vocab/unit/LB_F-PER-FT2
Pounds or Pounds Force per Square Foot is a British (Imperial) and American pressure unit which is directly related to the psi pressure unit by a factor of 144 (1 sq ft = 12 in x 12 in = 144 sq in). 1 Pound per Square Foot equals 47.8803 Pascals. The psf pressure unit is mostly for lower pressure applications such as specifying building structures to withstand a certain wind force or rating a building floor for maximum weight load.
unit:LB_F-PER-IN
URI: http://qudt.org/vocab/unit/LB_F-PER-IN
"Pound Force per Inch" is an Imperial unit for 'Force Per Length' expressed as \(lbf/in\).
unit:LB_F-PER-IN2
URI: http://qudt.org/vocab/unit/LB_F-PER-IN2
"Pound Force per Square Inch" is an Imperial unit for 'Force Per Area' expressed as \(psia\).
unit:LB_F-PER-IN2-SEC
URI: http://qudt.org/vocab/unit/LB_F-PER-IN2-SEC
"Pound Force per Square Inch Second" is a unit for 'Force Per Area Time' expressed as \(lbf / in^{2}-s\).
unit:LB_F-PER-LB
URI: http://qudt.org/vocab/unit/LB_F-PER-LB
"Pound Force per Pound" is an Imperial unit for 'Thrust To Mass Ratio' expressed as \(lbf/lb\).
unit:LB_F-SEC-PER-FT2
URI: http://qudt.org/vocab/unit/LB_F-SEC-PER-FT2
"Pound Force Second per Square Foot" is an Imperial unit for 'Dynamic Viscosity' expressed as \(lbf-s/ft^{2}\).
unit:LB_F-SEC-PER-IN2
URI: http://qudt.org/vocab/unit/LB_F-SEC-PER-IN2
"Pound Force Second per Square Inch" is an Imperial unit for 'Dynamic Viscosity' expressed as \(lbf-s/in^{2}\).
unit:LB_T
URI: http://qudt.org/vocab/unit/LB_T
An obsolete unit of mass; the Troy Pound has been defined as exactly 5760 grains, or 0.3732417216 kg. A Troy Ounce is 1/12th of a Troy Pound.
unit:LM
URI: http://qudt.org/vocab/unit/LM
The SI unit for measuring the flux of light being produced by a light source or received by a surface. The intensity of a light source is measured in candelas. One lumen represents the total flux of light emitted, equal to the intensity in candelas multiplied by the solid angle in steradians into which the light is emitted. A full sphere has a solid angle of \(4\cdot\pi\) steradians. A light source that uniformly radiates one candela in all directions has a total luminous flux of \(1 cd\cdot 4 \pi sr = 4 \pi cd \cdot sr \approx 12.57 \; \text{lumens}\). "Lumen" is a Latin word for light.
unit:LM-PER-W
URI: http://qudt.org/vocab/unit/LM-PER-W
A measurement of luminous efficacy, which is the light output in lumens using one watt of electricity.
unit:LM-SEC
URI: http://qudt.org/vocab/unit/LM-SEC
In photometry, the lumen second is the SI derived unit of luminous energy. It is based on the lumen, the SI unit of luminous flux, and the second, the SI base unit of time. The lumen second is sometimes called the talbot (symbol T). An older name for the lumen second was the lumberg.
unit:LUX
URI: http://qudt.org/vocab/unit/LUX
The SI unit for measuring the illumination (illuminance) of a surface. One lux is defined as an illumination of one lumen per square meter or 0.0001 phot. In considering the various light units, it's useful to think about light originating at a point and shining upon a surface. The intensity of the light source is measured in candelas; the total light flux in transit is measured in lumens (1 lumen = 1 candelau00b7steradian); and the amount of light received per unit of surface area is measured in lux (1 lux = 1 lumen/square meter). One lux is equal to approximately 0.09290 foot candle.
unit:LUX-HR
URI: http://qudt.org/vocab/unit/LUX-HR
The SI unit for measuring the illumination (illuminance) of a surface. One lux is defined as an illumination of one lumen per square meter or 0.0001 phot. In considering the various light units, it's useful to think about light originating at a point and shining upon a surface. The intensity of the light source is measured in candelas; the total light flux in transit is measured in lumens (1 lumen = 1 candelau00b7steradian); and the amount of light received per unit of surface area is measured in lux (1 lux = 1 lumen/square meter). One lux is equal to approximately 0.09290 foot candle.
unit:LY
URI: http://qudt.org/vocab/unit/LY
A unit of length defining the distance, in meters, that light travels in a vacuum in one year.
unit:M
URI: http://qudt.org/vocab/unit/M
The metric and SI base unit of distance. The 17th General Conference on Weights and Measures in 1983 defined the meter as that distance that makes the speed of light in a vacuum equal to exactly 299 792 458 meters per second. The speed of light in a vacuum, \(c\), is one of the fundamental constants of nature. The meter is equal to approximately 1.093 613 3 yards, 3.280 840 feet, or 39.370 079 inches.
unit:M-K
URI: http://qudt.org/vocab/unit/M-K
\(\textbf{Meter Kelvin} is a unit for 'Length Temperature' expressed as \(m K\).
unit:M-K-PER-W
URI: http://qudt.org/vocab/unit/M-K-PER-W
\(\textbf{Meter Kelvin per Watt} is a unit for 'Thermal Resistivity' expressed as \(K-m/W\).
unit:M-PER-HR
URI: http://qudt.org/vocab/unit/M-PER-HR
Metre per hour is a metric unit of both speed (scalar) and velocity (Vector (geometry)). Its symbol is m/h or mu00b7h-1 (not to be confused with the imperial unit symbol mph. By definition, an object travelling at a speed of 1 m/h for an hour would move 1 metre.
unit:M-PER-MIN
URI: http://qudt.org/vocab/unit/M-PER-MIN
Meter Per Minute (m/min) is a unit in the category of Velocity. It is also known as meter/minute, meters per minute, metre per minute, metres per minute. Meter Per Minute (m/min) has a dimension of LT-1 where L is length, and T is time. It can be converted to the corresponding standard SI unit m/s by multiplying its value by a factor of 0.016666666666
unit:M-PER-SEC
URI: http://qudt.org/vocab/unit/M-PER-SEC
Metre per second is an SI derived unit of both speed (scalar) and velocity (vector quantity which specifies both magnitude and a specific direction), defined by distance in metres divided by time in seconds. The official SI symbolic abbreviation is mu00b7s-1, or equivalently either m/s.
unit:M-PER-SEC2
URI: http://qudt.org/vocab/unit/M-PER-SEC2
The \(\textit{meter per Square second}\) is the unit of acceleration in the International System of Units (SI). As a derived unit it is composed from the SI base units of length, the metre, and the standard unit of time, the second. Its symbol is written in several forms as \(m/s^2\), or \(m s^{-2}\). As acceleration, the unit is interpreted physically as change in velocity or speed per time interval, that is, \(\textit{metre per second per second}\).
unit:M-PER-YR
URI: http://qudt.org/vocab/unit/M-PER-YR
A rate of change of SI standard unit length over a period of an average calendar year (365.25 days).
unit:M2
URI: http://qudt.org/vocab/unit/M2
The S I unit of area is the square metre.
unit:M2-HR-DEG_C-PER-KiloCAL_IT
URI: http://qudt.org/vocab/unit/M2-HR-DEG_C-PER-KiloCAL_IT
unit:M2-K
URI: http://qudt.org/vocab/unit/M2-K
\(\textbf{Square Meter Kelvin} is a unit for 'Area Temperature' expressed as \(m^{2}-K\).
unit:M2-K-PER-W
URI: http://qudt.org/vocab/unit/M2-K-PER-W
\(\textbf{Square Meter Kelvin per Watt} is a unit for 'Thermal Insulance' expressed as \((K^{2})m/W\).
unit:M2-PER-KiloGM
URI: http://qudt.org/vocab/unit/M2-PER-KiloGM
Square Meter Per Kilogram (m2/kg) is a unit in the category of Specific Area. It is also known as square meters per kilogram, square metre per kilogram, square metres per kilogram, square meter/kilogram, square metre/kilogram. This unit is commonly used in the SI unit system. Square Meter Per Kilogram (m2/kg) has a dimension of M-1L2 where M is mass, and L is length. This unit is the standard SI unit in this category.
unit:M2-PER-MOL
URI: http://qudt.org/vocab/unit/M2-PER-MOL
Square Meter Per Mole (m2/mol) is a unit in the category of Specific Area. It is also known as square meters per mole, square metre per per, square metres per per, square meter/per, square metre/per. This unit is commonly used in the SI unit system. Square Meter Per Mole (m2/mol) has a dimension of M-1L2 where M is mass, and L is length. This unit is the standard SI unit in this category.
unit:M2-PER-SEC
URI: http://qudt.org/vocab/unit/M2-PER-SEC
\(Square Metres per second is the SI derived unit of angular momentum, defined by distance or displacement in metres multiplied by distance again in metres and divided by time in seconds. The unit is written in symbols as m2/s or m2u00b7s-1 or m2s-1. It may be better understood when phrased as "metres per second times metres", i.e. the momentum of an object with respect to a position.\)
unit:M2-SR
URI: http://qudt.org/vocab/unit/M2-SR
"Square Meter Steradian" is a unit for 'Area Angle' expressed as \(m^{2}-sr\).
unit:M3
URI: http://qudt.org/vocab/unit/M3
The SI unit of volume, equal to 1.0e6 cm3, 1000 liters, 35.3147 ft3, or 1.30795 yd3. A cubic meter holds about 264.17 U.S. liquid gallons or 219.99 British Imperial gallons.
unit:M3-PER-HR
URI: http://qudt.org/vocab/unit/M3-PER-HR
Cubic Meter Per Hour (m3/h) is a unit in the category of Volume flow rate. It is also known as cubic meters per hour, cubic metre per hour, cubic metres per hour, cubic meter/hour, cubic metre/hour, cubic meter/hr, cubic metre/hr, flowrate. Cubic Meter Per Hour (m3/h) has a dimension of L3T-1 where L is length, and T is time. It can be converted to the corresponding standard SI unit m3/s by multiplying its value by a factor of 0.00027777777.
unit:M3-PER-KiloGM
URI: http://qudt.org/vocab/unit/M3-PER-KiloGM
Cubic Meter Per Kilogram (m3/kg) is a unit in the category of Specific volume. It is also known as cubic meters per kilogram, cubic metre per kilogram, cubic metres per kilogram, cubic meter/kilogram, cubic metre/kilogram. This unit is commonly used in the SI unit system. Cubic Meter Per Kilogram (m3/kg) has a dimension of M-1L3 where M is mass, and L is length. This unit is the standard SI unit in this category.
unit:M3-PER-MOL
URI: http://qudt.org/vocab/unit/M3-PER-MOL
The molar volume, symbol \(Vm\), is the volume occupied by one mole of a substance (chemical element or chemical compound) at a given temperature and pressure. It is equal to the molar mass (M) divided by the mass density. It has the SI unit cubic metres per mole \(m3/mol\), although it is more practical to use the units cubic decimetres per mole \(dm3/mol\) for gases and cubic centimetres per mole \(cm3/mol\) for liquids and solids
.unit:M3-PER-SEC
URI: http://qudt.org/vocab/unit/M3-PER-SEC
A cubic metre per second (\(m^{3}s^{-1}, m^{3}/s\)), cumecs or cubic meter per second in American English) is a derived SI unit of flow rate equal to that of a stere or cube with sides of one metre ( u0303 39.37 in) in length exchanged or moving each second. It is popularly used for water flow, especially in rivers and streams, and fractions for HVAC values measuring air flow.
unit:M3-PER-SEC2
URI: http://qudt.org/vocab/unit/M3-PER-SEC2
\(\textit{Cubic Meter per Square Second}\) is a C.G.S System unit for \(\textit{Standard Gravitational Parameter}\) expressed as \(m^3/s^2\)
unit:M4
URI: http://qudt.org/vocab/unit/M4
A unit associated with area moments of inertia.
unit:MACH
URI: http://qudt.org/vocab/unit/MACH
"Mach" is a unit for 'Dimensionless Ratio' expressed as \(mach\).
unit:MESH
URI: http://qudt.org/vocab/unit/MESH
"Mesh" is a measure of particle size or fineness of a woven product.
unit:MHO
URI: http://qudt.org/vocab/unit/MHO
"Mho" is a C.G.S System unit for 'Electric Conductivity' expressed as \(mho\).
unit:MHO_Stat
URI: http://qudt.org/vocab/unit/MHO_Stat
"StatMHO" is the unit of conductance, admittance, and susceptance in the C.G.S e.s.u system of units. One \(statmho\) is the conductance between two points in a conductor when a constant potential difference of \(1 \; statvolt\) applied between the points produces in the conductor a current of \(1 \; statampere\), the conductor not being the source of any electromotive force, approximately \(1.1126 \times 10^{-12} mho\).
unit:MI
URI: http://qudt.org/vocab/unit/MI
The exact length of the land mile varied slightly among English-speaking countries until the international yard and pound agreement in 1959 established the yard as exactly 0.9144 metres, giving a mile of exactly 1,609.344 metres. The United States adopted this international mile for most purposes, but retained the pre-1959 mile for some land-survey data, terming it the US survey mile. In the US, statute mile formally refers to the survey mile, about 3.219 mm (1/8 inch) longer than the international mile (the international mile is exactly 0.0002% less than the US survey mile).
unit:MI-PER-HR
URI: http://qudt.org/vocab/unit/MI-PER-HR
Miles per hour is an imperial unit of speed expressing the number of statute miles covered in one hour. It is currently the standard unit used for speed limits, and to express speeds generally, on roads in the United Kingdom and the United States. A common abbreviation is mph or MPH.
unit:MI-PER-MIN
URI: http://qudt.org/vocab/unit/MI-PER-MIN
Miles per minute is an imperial unit of speed expressing the number of statute miles covered in one minute.
unit:MI2
URI: http://qudt.org/vocab/unit/MI2
The square mile (abbreviated as sq mi and sometimes as mi) is an imperial and US unit of measure for an area equal to the area of a square of one statute mile. It should not be confused with miles square, which refers to the number of miles on each side squared. For instance, 20 miles square (20 × 20 miles) is equal to 400 square miles. One square mile is equivalent to: 4,014,489,600 square inches 27,878,400 square feet, 3,097,600 square yards, 640 acres, 258.9988110336 hectares, 2560 roods, 25,899,881,103.36 square centimetres, 2,589,988.110336 square metres, 2.589988110336 square kilometres When applied to a portion of the earth's surface, which is curved rather than flat, 'square mile' is an informal synonym for section.
unit:MI3
URI: http://qudt.org/vocab/unit/MI3
A cubic mile is an imperial / U.S. customary unit of volume, used in the United States, Canada, and the United Kingdom. It is defined as the volume of a cube with sides of 1 mile in length.
unit:MIL
URI: http://qudt.org/vocab/unit/MIL
The Mil unit of plane angle, as defined by NATO to be 1/6400 of a circle.
unit:MIL_Circ
URI: http://qudt.org/vocab/unit/MIL_Circ
A circular mil is a unit of area, equal to the area of a circle with a diameter of one mil (one thousandth of an inch). It is a convenient unit for referring to the area of a wire with a circular cross section, because the area in circular mils can be calculated without reference to pi (\(\pi\)). The area in circular mils, A, of a circle with a diameter of d mils, is given by the formula: Electricians in Canada and the United States are familiar with the circular mil because the National Electrical Code (NEC) uses the circular mil to define wire sizes larger than 0000 AWG. In many NEC publications and uses, large wires may be expressed in thousands of circular mils, which is abbreviated in two different ways: MCM or kcmil. For example, one common wire size used in the NEC has a cross-section of 250,000 circular mils, written as 250 kcmil or 250 MCM, which is the first size larger than 0000 AWG used within the NEC.
unit:MIN
URI: http://qudt.org/vocab/unit/MIN
A minute is a unit of measurement of time. The minute is a unit of time equal to 1/60 (the first sexagesimal fraction of an hour or 60 seconds. In the UTC time scale, a minute on rare occasions has 59 or 61 seconds; see leap second. The minute is not an SI unit; however, it is accepted for use with SI units. The SI symbol for minute or minutes is min (for time measurement) or the prime symbol after a number, e.g. 5' (for angle measurement, even if it is informally used for time).
unit:MIN_Sidereal
URI: http://qudt.org/vocab/unit/MIN_Sidereal
Sidereal time is a time-keeping system astronomers use to keep track of the direction to point their telescopes to view a given star in the night sky. A mean sidereal day is about \(23 h 56 m 4.1 s\) in length. However, due to variations in the rotation rate of the Earth, the rate of an ideal sidereal clock deviates from any simple multiple of a civil clock. In practice, the difference is kept track of by the difference UTC-UT1, which is measured by radio telescopes and kept on file and available to the public at the IERS and at the United States Naval Observatory. A Sidereal Minute is \(1/60^{th}\) of a Sidereal Hour, which is \(1/24^{th}\) of a Sidereal Day.
unit:MI_N
URI: http://qudt.org/vocab/unit/MI_N
A unit of distance used primarily at sea and in aviation. The nautical mile is defined to be the average distance on the Earth's surface represented by one minute of latitude. In 1929 an international conference in Monaco redefined the nautical mile to be exactly 1852 meters or 6076.115 49 feet, a distance known as the international nautical mile. The international nautical mile equals about 1.1508 statute miles. There are usually 3 nautical miles in a league. The unit is designed to equal 1/60 degree, although actual degrees of latitude vary from about 59.7 to 60.3 nautical miles. (Note: using data from the Geodetic Reference System 1980, the "true" length of a nautical mile would be 1852.216 meters.)
unit:MI_N-PER-HR
URI: http://qudt.org/vocab/unit/MI_N-PER-HR
The knot is a unit of speed equal to one nautical mile (1.852 km) per hour, approximately 1.151 mph. The abbreviation kn is preferred by the International Hydrographic Organization (IHO), which includes every major seafaring nation; but the abbreviations kt (singular) and kts (plural) are also widely used conflicting with the SI symbol for kilotonne which is also "kt". The knot is a non-SI unit accepted for use with the International System of Units (SI). Worldwide, the knot is used in meteorology, and in maritime and air navigation-for example, a vessel travelling at 1 knot along a meridian travels one minute of geographic latitude in one hour.
unit:MI_N-PER-MIN
URI: http://qudt.org/vocab/unit/MI_N-PER-MIN
The SI derived unit for speed is the meter/second. 1 meter/second is equal to 0.0323974082073 nautical mile per minute.
unit:MI_US
URI: http://qudt.org/vocab/unit/MI_US
The exact length of the land mile varied slightly among English-speaking countries until the international yard and pound agreement in 1959 established the yard as exactly 0.9144 metres, giving a mile of exactly 1,609.344 metres. The United States adopted this international mile for most purposes, but retained the pre-1959 mile for some land-survey data, terming it the US survey mile. In the US, statute mile formally refers to the survey mile, about 3.219 mm (1/8 inch) longer than the international mile (the international mile is exactly 0.0002\% less than the US survey mile).
unit:MO
URI: http://qudt.org/vocab/unit/MO
A unit of time corresponding approximately to one cycle of the moon's phases, or about 30 days or 4 weeks. Also known as the 'Synodic Month' and calculated as 29.53059 days.
unit:MOHM
URI: http://qudt.org/vocab/unit/MOHM
A unit of mechanical mobility for sound waves, being the reciprocal of the mechanical ohm unit of impedance, i.e., for an acoustic medium, the ratio of the flux or volumic speed (area times particle speed) of the resulting waves through it to the effective sound pressure (i.e. force) causing them, the unit being qualified, according to the units used, as m.k.s. or c.g.s. The mechanical ohm is equivalent to \(1\,dyn\cdot\,s\cdot cm^{-1}\) or \(10^{-3} N\cdot s\cdot m^{-1}\).
unit:MOL
URI: http://qudt.org/vocab/unit/MOL
The mole is a unit of measurement used in chemistry to express amounts of a chemical substance. The official definition, adopted as part of the SI system in 1971, is that one mole of a substance contains just as many elementary entities (atoms, molecules, ions, or other kinds of particles) as there are atoms in 12 grams of carbon-12 (carbon-12 is the most common atomic form of carbon, consisting of atoms having 6 protons and 6 neutrons). This corresponds to a value of \(6.02214179(30) \times 1023\) elementary entities of the substance. It is one of the base units in the International System of Units, and has the unit symbol \(mol\). A Mole is the SI base unit of the amount of a substance (as distinct from its mass or weight). Moles measure the actual number of atoms or molecules in an object. An earlier name is gram molecular weight, because one mole of a chemical compound is the same number of grams as the molecular weight of a molecule of that compound measured in atomic mass units.
unit:MOL-DEG_C
URI: http://qudt.org/vocab/unit/MOL-DEG_C
\(\textbf{Mole Degree Celsius} is a C.G.S System unit for 'Temperature Amount Of Substance' expressed as \(mol-degC\).
unit:MOL-K
URI: http://qudt.org/vocab/unit/MOL-K
Mole Kelvin is a unit for \textit{'Temperature Amount Of Substance'} expressed as \(mol-K\)
.unit:MOL-PER-GM-HR
URI: http://qudt.org/vocab/unit/MOL-PER-GM-HR
SI unit of the quantity of matter per SI unit of mass per unit of time expressed in hour.
unit:MOL-PER-KiloGM
URI: http://qudt.org/vocab/unit/MOL-PER-KiloGM
Mole Per Kilogram (\(mol/kg\)) is a unit of Molality
unit:MOL-PER-KiloGM-PA
URI: http://qudt.org/vocab/unit/MOL-PER-KiloGM-PA
Mole Per Kilogram Pascal (\(mol/kg-pa\)) is a unit of Molar Mass variation due to Pressure.
unit:MOL-PER-M2
URI: http://qudt.org/vocab/unit/MOL-PER-M2
SI unit of quantity of matter per SI unit area.
unit:MOL-PER-M2-DAY
URI: http://qudt.org/vocab/unit/MOL-PER-M2-DAY
quantity of matter per unit area per unit of time.
unit:MOL-PER-M2-SEC
URI: http://qudt.org/vocab/unit/MOL-PER-M2-SEC
SI unit of quantity of matter per SI unit area per SI unit of time.
unit:MOL-PER-M2-SEC-M-SR
URI: http://qudt.org/vocab/unit/MOL-PER-M2-SEC-M-SR
Unavailable
unit:MOL-PER-M2-SEC-SR
URI: http://qudt.org/vocab/unit/MOL-PER-M2-SEC-SR
Unavailable
unit:MOL-PER-M3
URI: http://qudt.org/vocab/unit/MOL-PER-M3
The SI derived unit for amount-of-substance concentration is the mole/cubic meter.
unit:MOL-PER-M3-SEC
URI: http://qudt.org/vocab/unit/MOL-PER-M3-SEC
SI unit of quantity of matter per SI unit volume per SI unit of time.
unit:MO_Synodic
URI: http://qudt.org/vocab/unit/MO_Synodic
A unit of time corresponding approximately to one cycle of the moon's phases, or about 30 days or 4 weeks and calculated as 29.53059 days.
unit:MX
URI: http://qudt.org/vocab/unit/MX
"Maxwell" is a C.G.S System unit for 'Magnetic Flux' expressed as \(Mx\).
unit:MebiBYTE
URI: http://qudt.org/vocab/unit/MebiBYTE
The mebibyte is a multiple of the unit byte for digital information equivalent to \(1024^{2} bytes\) or \(2^{20} bytes\).
unit:MegaBAR
URI: http://qudt.org/vocab/unit/MegaBAR
The bar is a non-SI unit of pressure, defined by the IUPAC as exactly equal to 100,000 Pa. It is about equal to the atmospheric pressure on Earth at sea level, and since 1982 the IUPAC has recommended that the standard for atmospheric pressure should be harmonized to \(100,000 Pa = 1 bar \approx 750.0616827 Torr\). Units derived from the bar are the megabar (symbol: Mbar), kilobar (symbol: kbar), decibar (symbol: dbar), centibar (symbol: cbar), and millibar (symbol: mbar or mb). They are not SI or cgs units, but they are accepted for use with the SI.
unit:MegaBIT-PER-SEC
URI: http://qudt.org/vocab/unit/MegaBIT-PER-SEC
A megabit per second (Mbit/s or Mb/s; not to be confused with mbit/s which means millibit per second, or with Mbitps which means megabit picosecond) is a unit of data transfer rate equal to 1,000,000 bits per second or 1,000 kilobits per second or 125,000 bytes per second or 125 kilobytes per second.
unit:MegaBYTE
URI: http://qudt.org/vocab/unit/MegaBYTE
The megabyte is a multiple of the unit byte for digital information equivalent to \(2^{6} bytes\). Although the prefix mega means \(10^{6}\), the term megabyte and symbol \(mB\) have historically been used to refer to \(1024^{2} bytes\) or \(2^{20} bytes\). The megabyte is a multiple of the unit byte for digital information storage or transmission with three different values depending on context: 1048576 bytes generally for computer memory; and one million bytes (10, see prefix mega-) generally for computer storage. In rare cases, it is used to mean \(1000 \times 1024 (1024,000) bytes\). The IEEE Standards Board has confirmed that mega means \(1000,000\), with exceptions allowed for the base-two meaning.
unit:MegaEV
URI: http://qudt.org/vocab/unit/MegaEV
\(\textbf{Mega Electron Volt} is a unit for 'Energy And Work' expressed as \(MeV\).
unit:MegaEV-FemtoM
URI: http://qudt.org/vocab/unit/MegaEV-FemtoM
\(\textbf{Mega Electron Volt Femtometer} is a unit for 'Length Energy' expressed as \(MeV fm\).
unit:MegaEV-PER-CentiM
URI: http://qudt.org/vocab/unit/MegaEV-PER-CentiM
"Mega Electron Volt per Centimeter" is a unit for 'Linear Energy Transfer' expressed as \(MeV/cm\).
unit:MegaEV-PER-SpeedOfLight
URI: http://qudt.org/vocab/unit/MegaEV-PER-SpeedOfLight
"Mega Electron Volt per Speed of Light" is a unit for 'Linear Momentum' expressed as \(MeV/c\).
unit:MegaHZ
URI: http://qudt.org/vocab/unit/MegaHZ
"Megahertz" is a C.G.S System unit for 'Frequency' expressed as \(MHz\).
unit:MegaHZ-PER-K
URI: http://qudt.org/vocab/unit/MegaHZ-PER-K
\(\textbf{Mega Hertz per Kelvin} is a unit for 'Inverse Time Temperature' expressed as \(MHz K^{-1}\).
unit:MegaHZ-PER-T
URI: http://qudt.org/vocab/unit/MegaHZ-PER-T
"Mega Hertz per Tesla" is a unit for 'Electric Charge Per Mass' expressed as \(MHz T^{-1}\).
unit:MegaJ-PER-K
URI: http://qudt.org/vocab/unit/MegaJ-PER-K
MegaJoule Per Kelvin (MegaJ/K) is a unit in the category of Entropy.
unit:MegaJ-PER-M2
URI: http://qudt.org/vocab/unit/MegaJ-PER-M2
MegaJoule Per Square Meter (\(MegaJ/m^2\)) is a unit in the category of Energy density.
unit:MegaTOE
URI: http://qudt.org/vocab/unit/MegaTOE
The tonne of oil equivalent (toe) is a unit of energy: the amount of energy released by burning one tonne of crude oil, approximately 42 GJ (as different crude oils have different calorific values, the exact value of the toe is defined by convention; unfortunately there are several slightly different definitions as discussed below). The toe is sometimes used for large amounts of energy, as it can be more intuitive to visualise, say, the energy released by burning 1000 tonnes of oil than 42,000 billion joules (the SI unit of energy).
Multiples of the toe are used, in particular the megatoe (Mtoe, one million toe) and the gigatoe (Gtoe, one billion toe).
unit:MexicanUnidadDeInversion
URI: http://qudt.org/vocab/unit/MexicanUnidadDeInversion
Mexico
unit:MicroBQ-PER-KiloGM
URI: http://qudt.org/vocab/unit/MicroBQ-PER-KiloGM
One radioactive disintegration per hundred thousand seconds from an SI standard unit of mass of sample.
unit:MicroC
URI: http://qudt.org/vocab/unit/MicroC
A MicroCoulomb is \(10^{-6} C\).
unit:MicroCi
URI: http://qudt.org/vocab/unit/MicroCi
Another commonly used measure of radioactivity, the microcurie: \(1 \micro Ci = 3.7 \times 10 disintegrations per second = 2.22 \times 10 disintegrations per minute\). A radiotherapy machine may have roughly 1000 Ci of a radioisotope such as caesium-137 or cobalt-60. This quantity of radioactivity can produce serious health effects with only a few minutes of close-range, un-shielded exposure. The typical human body contains roughly \(0.1\micro Ci\) of naturally occurring potassium-40.
unit:MicroFARAD
URI: http://qudt.org/vocab/unit/MicroFARAD
The "microfarad" (symbolized \(\mu F\)) is a unit of capacitance, equivalent to 0.000001 (10 to the -6th power) farad. The microfarad is a moderate unit of capacitance. In utility alternating-current (AC) and audio-frequency (AF) circuits, capacitors with values on the order of \(1 \mu F\) or more are common. At radio frequencies (RF), a smaller unit, the picofarad (pF), is often used.
unit:MicroG
URI: http://qudt.org/vocab/unit/MicroG
"Microgravity" is a unit for 'Linear Acceleration' expressed as \(microG\).
unit:MicroGAL-PER-M
URI: http://qudt.org/vocab/unit/MicroGAL-PER-M
A rate of change of one millionth part of a unit of gravitational acceleration equal to one centimetre per second per second over a distance of one metre.
unit:MicroGM-PER-GM
URI: http://qudt.org/vocab/unit/MicroGM-PER-GM
One part per 10**6 (million) by mass of the measurand in the matrix.
unit:MicroGM-PER-L-HR
URI: http://qudt.org/vocab/unit/MicroGM-PER-L-HR
A rate of change of mass of a measurand equivalent to 10^-9 kilogram (the SI unit of mass) per litre volume of matrix over a period of 1 hour.
unit:MicroGM-PER-M2-DAY
URI: http://qudt.org/vocab/unit/MicroGM-PER-M2-DAY
Unavailable
unit:MicroGM-PER-M3-HR
URI: http://qudt.org/vocab/unit/MicroGM-PER-M3-HR
Unavailable
unit:MicroGM-PER-MilliL
URI: http://qudt.org/vocab/unit/MicroGM-PER-MilliL
One 10**6 part of the SI standard unit of mass of the measurand per millilitre volume of matrix.
unit:MicroGRAY
URI: http://qudt.org/vocab/unit/MicroGRAY
0.000001 fold of the SI unit of radiation dose. Radiation carries energy, and when it is absorbed by matter the matter receives this energy. The dose is the amount of energy deposited per unit of mass. One gray is defined to be the dose of one joule of energy absorbed per kilogram of matter, or 100 rad. The unit is named for the British physician L. Harold Gray (1905-1965), an authority on the use of radiation in the treatment of cancer.
unit:MicroH
URI: http://qudt.org/vocab/unit/MicroH
The SI derived unit for inductance is the henry. 1 henry is equal to 1000000 microhenry.
unit:MicroIN
URI: http://qudt.org/vocab/unit/MicroIN
"Microinch" is an Imperial unit for 'Length' expressed as \(in^{-6}\).
unit:MicroM
URI: http://qudt.org/vocab/unit/MicroM
"Micrometer" is a unit for 'Length' expressed as \(microm\).
unit:MicroM-PER-MilliL
URI: http://qudt.org/vocab/unit/MicroM-PER-MilliL
Unavailable
unit:MicroM3-PER-MilliL
URI: http://qudt.org/vocab/unit/MicroM3-PER-MilliL
Unavailable
unit:MicroMOL-PER-GM
URI: http://qudt.org/vocab/unit/MicroMOL-PER-GM
Micromole Per Gram (\(umol/g\)) is a unit of Molality
unit:MicroMOL-PER-GM-HR
URI: http://qudt.org/vocab/unit/MicroMOL-PER-GM-HR
Unavailable
unit:MicroMOL-PER-GM-SEC
URI: http://qudt.org/vocab/unit/MicroMOL-PER-GM-SEC
Unavailable
unit:MicroMOL-PER-KiloGM
URI: http://qudt.org/vocab/unit/MicroMOL-PER-KiloGM
Unavailable
unit:MicroMOL-PER-L-HR
URI: http://qudt.org/vocab/unit/MicroMOL-PER-L-HR
Unavailable
unit:MicroMOL-PER-M2
URI: http://qudt.org/vocab/unit/MicroMOL-PER-M2
One part per 10**6 (million) of the SI unit of quantity of matter (the mole) per SI unit area.
unit:MicroMOL-PER-M2-DAY
URI: http://qudt.org/vocab/unit/MicroMOL-PER-M2-DAY
Unavailable
unit:MicroMOL-PER-M2-HR
URI: http://qudt.org/vocab/unit/MicroMOL-PER-M2-HR
Unavailable
unit:MicroMOL-PER-M2-SEC
URI: http://qudt.org/vocab/unit/MicroMOL-PER-M2-SEC
One part per 10**6 (million) of the SI unit of quantity of matter (the mole) per SI unit area per SI unit of time. This term is based on the number of photons in a certain waveband incident per unit time (s) on a unit area (m2) divided by the Avogadro constant (6.022 x 1023 mol-1). It is used commonly to describe PAR in the 400-700 nm waveband. Definition Source: Thimijan, Richard W., and Royal D. Heins. 1982. Photometric, Radiometric, and Quantum Light Units of Measure: A Review of Procedures for Interconversion. HortScience 18:818-822.
unit:MicroMOL-PER-MicroMOL-DAY
URI: http://qudt.org/vocab/unit/MicroMOL-PER-MicroMOL-DAY
Unavailable
unit:MicroMOL-PER-SEC
URI: http://qudt.org/vocab/unit/MicroMOL-PER-SEC
This unit is used commonly to describe Photosynthetic Photon Flux (PPF) - the total number of photons emitted by a light source each second within the PAR wavelength range.
unit:MicroSEC
URI: http://qudt.org/vocab/unit/MicroSEC
"Microsecond" is a unit for 'Time' expressed as \(microsec\).
unit:MicroSV
URI: http://qudt.org/vocab/unit/MicroSV
Although the sievert has the same dimensions as the gray (i.e. joules per kilogram), it measures a different quantity. To avoid any risk of confusion between the absorbed dose and the equivalent dose, the corresponding special units, namely the gray instead of the joule per kilogram for absorbed dose and the sievert instead of the joule per kilogram for the dose equivalent, should be used. 0.000001-fold of the SI derived unit sievert.
unit:MicroSV-PER-HR
URI: http://qudt.org/vocab/unit/MicroSV-PER-HR
0.000001-fold of the derived SI unit sievert divided by the unit hour
unit:MicroTORR
URI: http://qudt.org/vocab/unit/MicroTORR
"MicroTorr" is a unit for 'Force Per Area' expressed as \(microtorr\).
unit:MilLength
URI: http://qudt.org/vocab/unit/MilLength
"Mil Length" is a C.G.S System unit for 'Length' expressed as \(mil\).
unit:MilliARCSEC
URI: http://qudt.org/vocab/unit/MilliARCSEC
A minute of arc, arcminute, or minute arc (MOA), is a unit of angular measurement equal to one sixtieth (1/60) of one degree (circle/21,600), or \(\pi /10,800 radians\). In turn, a second of arc or arcsecond is one sixtieth (1/60) of one minute of arc. Since one degree is defined as one three hundred and sixtieth (1/360) of a rotation, one minute of arc is 1/21,600 of a rotation. the milliarcsecond, abbreviated mas, is used in astronomy.
unit:MilliBAR
URI: http://qudt.org/vocab/unit/MilliBAR
The bar is a non-SI unit of pressure, defined by the IUPAC as exactly equal to 100,000 Pa. It is about equal to the atmospheric pressure on Earth at sea level, and since 1982 the IUPAC has recommended that the standard for atmospheric pressure should be harmonized to \(100,000 Pa = 1 bar \approx 750.0616827 Torr\). Units derived from the bar are the megabar (symbol: Mbar), kilobar (symbol: kbar), decibar (symbol: dbar), centibar (symbol: cbar), and millibar (symbol: mbar or mb). They are not SI or cgs units, but they are accepted for use with the SI.
unit:MilliBQ-PER-GM
URI: http://qudt.org/vocab/unit/MilliBQ-PER-GM
One radioactive disintegration per thousand seconds per 1000th SI unit of sample mass.
unit:MilliBQ-PER-KiloGM
URI: http://qudt.org/vocab/unit/MilliBQ-PER-KiloGM
One radioactive disintegration per thousand seconds from an SI standard unit of mass of sample.
unit:MilliBQ-PER-L
URI: http://qudt.org/vocab/unit/MilliBQ-PER-L
One radioactive disintegration per second from the SI unit of volume (cubic metre). Equivalent to Becquerels per cubic metre.
unit:MilliBQ-PER-M2-DAY
URI: http://qudt.org/vocab/unit/MilliBQ-PER-M2-DAY
One radioactive disintegration per thousand seconds in material passing through an area of one square metre during a period of one day (86400 seconds).
unit:MilliC
URI: http://qudt.org/vocab/unit/MilliC
A MilliCoulomb is \(10^{-3} C\).
unit:MilliDEG_C
URI: http://qudt.org/vocab/unit/MilliDEG_C
\(Millidegree Celsius is a scaled unit of measurement for temperature.\)
unit:MilliG
URI: http://qudt.org/vocab/unit/MilliG
"Milligravity" is a unit for 'Linear Acceleration' expressed as \(mG\).
unit:MilliGAL-PER-MO
URI: http://qudt.org/vocab/unit/MilliGAL-PER-MO
A rate of change of one millionth part of a unit of gravitational acceleration equal to one centimetre per second per second over a time duration of 30.4375 days or 2629800 seconds.
unit:MilliGM-PER-DeciL
URI: http://qudt.org/vocab/unit/MilliGM-PER-DeciL
A derived unit for amount-of-substance concentration measured in mg/dL.
unit:MilliGM-PER-M2-DAY
URI: http://qudt.org/vocab/unit/MilliGM-PER-M2-DAY
Unavailable
unit:MilliGM-PER-M2-HR
URI: http://qudt.org/vocab/unit/MilliGM-PER-M2-HR
Unavailable
unit:MilliGM-PER-M2-SEC
URI: http://qudt.org/vocab/unit/MilliGM-PER-M2-SEC
Unavailable
unit:MilliGM-PER-M3-DAY
URI: http://qudt.org/vocab/unit/MilliGM-PER-M3-DAY
Unavailable
unit:MilliGM-PER-M3-HR
URI: http://qudt.org/vocab/unit/MilliGM-PER-M3-HR
Unavailable
unit:MilliGM-PER-M3-SEC
URI: http://qudt.org/vocab/unit/MilliGM-PER-M3-SEC
Unavailable
unit:MilliH
URI: http://qudt.org/vocab/unit/MilliH
A unit of inductance equal to one thousandth of a henry.
unit:MilliL-PER-M2-DAY
URI: http://qudt.org/vocab/unit/MilliL-PER-M2-DAY
Unavailable
unit:MilliM
URI: http://qudt.org/vocab/unit/MilliM
The millimetre (International spelling as used by the International Bureau of Weights and Measures) or millimeter (American spelling) (SI unit symbol mm) is a unit of length in the metric system, equal to one thousandth of a metre, which is the SI base unit of length. It is equal to 1000 micrometres or 1000000 nanometres. A millimetre is equal to exactly 5/127 (approximately 0.039370) of an inch.
unit:MilliM3
URI: http://qudt.org/vocab/unit/MilliM3
A metric measure of volume or capacity equal to a cube 1 millimeter on each edge
unit:MilliMOL-PER-L
URI: http://qudt.org/vocab/unit/MilliMOL-PER-L
The SI derived unit for amount-of-substance concentration is the mmo/L.
unit:MilliMOL-PER-M2-DAY
URI: http://qudt.org/vocab/unit/MilliMOL-PER-M2-DAY
Unavailable
unit:MilliMOL-PER-M3-DAY
URI: http://qudt.org/vocab/unit/MilliMOL-PER-M3-DAY
Unavailable.
unit:MilliM_HG
URI: http://qudt.org/vocab/unit/MilliM_HG
The millimeter of mercury is defined as the pressure exerted at the base of a column of fluid exactly 1 mm high, when the density of the fluid is exactly \(13.5951 g/cm^{3}\), at a place where the acceleration of gravity is exactly \(9.80665 m/s^{2}\).
unit:MilliM_HGA
URI: http://qudt.org/vocab/unit/MilliM_HGA
Millimeters of Mercury inclusive of atmospheric pressure
unit:MilliRAD_R-PER-HR
URI: http://qudt.org/vocab/unit/MilliRAD_R-PER-HR
One thousandth part of an absorbed ionizing radiation dose equal to 100 ergs per gram of irradiated material received per hour.
unit:MilliSEC
URI: http://qudt.org/vocab/unit/MilliSEC
"Millisecond" is an Imperial unit for 'Time' expressed as \(ms\).
unit:MilliTORR
URI: http://qudt.org/vocab/unit/MilliTORR
"MilliTorr" is a unit for 'Force Per Area' expressed as \(utorr\).
unit:MilliW-PER-CentiM2-MicroM-SR
URI: http://qudt.org/vocab/unit/MilliW-PER-CentiM2-MicroM-SR
Unavailable
unit:MilliW-PER-M2-NanoM
URI: http://qudt.org/vocab/unit/MilliW-PER-M2-NanoM
Unavailable
unit:MilliW-PER-M2-NanoM-SR
URI: http://qudt.org/vocab/unit/MilliW-PER-M2-NanoM-SR
Unavailable
unit:MoroccanDirham
URI: http://qudt.org/vocab/unit/MoroccanDirham
Morocco, Western Sahara
unit:N
URI: http://qudt.org/vocab/unit/N
The "Newton" is the SI unit of force. A force of one newton will accelerate a mass of one kilogram at the rate of one meter per second per second. The newton is named for Isaac Newton (1642-1727), the British mathematician, physicist, and natural philosopher. He was the first person to understand clearly the relationship between force (F), mass (m), and acceleration (a) expressed by the formula \(F = m \cdot a\).
unit:N-M
URI: http://qudt.org/vocab/unit/N-M
"Torque" is the tendency of a force to cause a rotation, is the product of the force and the distance from the center of rotation to the point where the force is applied. Torque has the same units as work or energy, but it is a different physical concept. To stress the difference, scientists measure torque in newton meters rather than in joules, the SI unit of work. One newton meter is approximately 0.737562 pound foot.
unit:N-M-SEC
URI: http://qudt.org/vocab/unit/N-M-SEC
The SI derived unit of angular momentum.
unit:N-PER-C
URI: http://qudt.org/vocab/unit/N-PER-C
Newton Per Coulomb ( N/C) is a unit in the category of Electric field strength. It is also known as newtons/coulomb. Newton Per Coulomb ( N/C) has a dimension of MLT-3I-1 where M is mass, L is length, T is time, and I is electric current. It essentially the same as the corresponding standard SI unit V/m.
unit:N-PER-KiloGM
URI: http://qudt.org/vocab/unit/N-PER-KiloGM
Gravitational field strength at a point is the gravitational force per unit mass at that point. It is a vector and its S.I. unit is N kg-1.
unit:N-PER-M
URI: http://qudt.org/vocab/unit/N-PER-M
Newton Per Meter (N/m) is a unit in the category of Surface tension. It is also known as newtons per meter, newton per metre, newtons per metre, newton/meter, newton/metre. This unit is commonly used in the SI unit system. Newton Per Meter (N/m) has a dimension of MT-2 where M is mass, and T is time. This unit is the standard SI unit in this category.
unit:N-PER-M2
URI: http://qudt.org/vocab/unit/N-PER-M2
The SI unit of pressure. The pascal is the standard pressure unit in the MKS metric system, equal to one newton per square meter or one "kilogram per meter per second per second." The unit is named for Blaise Pascal (1623-1662), French philosopher and mathematician, who was the first person to use a barometer to measure differences in altitude.
unit:N-SEC-PER-M3
URI: http://qudt.org/vocab/unit/N-SEC-PER-M3
The SI unit of specific acoustic impedance. When sound waves pass through any physical substance the pressure of the waves causes the particles of the substance to move. The sound specific impedance is the ratio between the sound pressure and the particle velocity it produces. The specific impedance is \(1 N \cdot s \cdot m^{-3} \) if unit pressure produces unit velocity.
unit:NAT
URI: http://qudt.org/vocab/unit/NAT
A nat is a logarithmic unit of information or entropy, based on natural logarithms and powers of e, rather than the powers of 2 and base 2 logarithms which define the bit. The nat is the natural unit for information entropy. Physical systems of natural units which normalize Boltzmann's constant to 1 are effectively measuring thermodynamic entropy in nats.
unit:NAT-PER-SEC
URI: http://qudt.org/vocab/unit/NAT-PER-SEC
"Nat per Second" is information rate in natural units.
unit:NP
URI: http://qudt.org/vocab/unit/NP
The neper is a logarithmic unit for ratios of measurements of physical field and power quantities, such as gain and loss of electronic signals. It has the unit symbol Np. The unit's name is derived from the name of John Napier, the inventor of logarithms. As is the case for the decibel and bel, the neper is not a unit in the International System of Units (SI), but it is accepted for use alongside the SI. Like the decibel, the neper is a unit in a logarithmic scale. While the bel uses the decadic (base-10) logarithm to compute ratios, the neper uses the natural logarithm, based on Euler's number
unit:NTU
URI: http://qudt.org/vocab/unit/NTU
"Nephelometry Turbidity Unit" is a C.G.S System unit for 'Turbidity' expressed as \(NTU\).
unit:NUM
URI: http://qudt.org/vocab/unit/NUM
"Number" is a unit for 'Dimensionless' expressed as (\#\).
unit:NUM-PER-CentiM-KiloYR
URI: http://qudt.org/vocab/unit/NUM-PER-CentiM-KiloYR
Unavailable
unit:NUM-PER-HA
URI: http://qudt.org/vocab/unit/NUM-PER-HA
Count of an entity or phenomenon's occurrence in 10,000 times the SI unit area (square metre).
unit:NUM-PER-HectoGM
URI: http://qudt.org/vocab/unit/NUM-PER-HectoGM
Count of an entity or phenomenon occurrence in one 10th of the SI unit of mass (kilogram).
unit:NUM-PER-MilliGM
URI: http://qudt.org/vocab/unit/NUM-PER-MilliGM
Count of an entity or phenomenon occurrence in one millionth of the SI unit of mass (kilogram).
unit:NUM-PER-YR
URI: http://qudt.org/vocab/unit/NUM-PER-YR
"Number per Year" is a unit for 'Frequency' expressed as \(\#/yr\).
unit:NanoFARAD
URI: http://qudt.org/vocab/unit/NanoFARAD
A common metric unit of electric capacitance equal to \(10^{-9} farad\). This unit was previously called the \(millimicrofarad\).
unit:NanoGM
URI: http://qudt.org/vocab/unit/NanoGM
10**-9 grams or one 10**-12 of the SI standard unit of mass (kilogram).
unit:NanoGM-PER-M3
URI: http://qudt.org/vocab/unit/NanoGM-PER-M3
"0.000000000001-fold of the SI base unit kilogram divided by the power of the SI base unit metre with the exponent 3"
"Derived from GM-PER-M3 which exists in QUDT"
unit:NanoGM-PER-MicroL
URI: http://qudt.org/vocab/unit/NanoGM-PER-MicroL
Unavailable
unit:NanoGM-PER-MilliL
URI: http://qudt.org/vocab/unit/NanoGM-PER-MilliL
One 10**12 part of the SI standard unit of mass of the measurand per millilitre volume of matrix.
unit:NanoMOL-PER-CentiM3-HR
URI: http://qudt.org/vocab/unit/NanoMOL-PER-CentiM3-HR
Unavailable
unit:NanoMOL-PER-GM-SEC
URI: http://qudt.org/vocab/unit/NanoMOL-PER-GM-SEC
Unavailable
unit:NanoMOL-PER-KiloGM
URI: http://qudt.org/vocab/unit/NanoMOL-PER-KiloGM
Unavailable
unit:NanoMOL-PER-L-DAY
URI: http://qudt.org/vocab/unit/NanoMOL-PER-L-DAY
Unavailable
unit:NanoMOL-PER-M2-DAY
URI: http://qudt.org/vocab/unit/NanoMOL-PER-M2-DAY
Unavailable
unit:NanoMOL-PER-MicroGM-HR
URI: http://qudt.org/vocab/unit/NanoMOL-PER-MicroGM-HR
Unavailable
unit:NanoMOL-PER-MicroMOL
URI: http://qudt.org/vocab/unit/NanoMOL-PER-MicroMOL
Unavailable.
unit:NanoMOL-PER-MicroMOL-DAY
URI: http://qudt.org/vocab/unit/NanoMOL-PER-MicroMOL-DAY
Unavailable.
unit:NanoSEC
URI: http://qudt.org/vocab/unit/NanoSEC
A nanosecond is a SI unit of time equal to one billionth of a second (10-9 or 1/1,000,000,000 s). One nanosecond is to one second as one second is to 31.69 years. The word nanosecond is formed by the prefix nano and the unit second.
unit:NetherlandsAntillianGuilder
URI: http://qudt.org/vocab/unit/NetherlandsAntillianGuilder
Netherlands Antilles
unit:NewTaiwanDollar
URI: http://qudt.org/vocab/unit/NewTaiwanDollar
Taiwan and other islands that are under the effective control of the Republic of China (ROC)
unit:NewZealandDollar
URI: http://qudt.org/vocab/unit/NewZealandDollar
Cook Islands, New Zealand, Niue, Pitcairn, Tokelau
unit:OCT
URI: http://qudt.org/vocab/unit/OCT
An octave is a doubling or halving of a frequency. One oct is the logarithmic frequency interval between \(f1\) and \(f2\) when \(f2/f1 = 2\).
unit:OERSTED
URI: http://qudt.org/vocab/unit/OERSTED
Oersted (abbreviated as Oe) is the unit of magnetizing field (also known as H-field, magnetic field strength or intensity) in the CGS system of units.
unit:OERSTED-CentiM
URI: http://qudt.org/vocab/unit/OERSTED-CentiM
"Oersted Centimeter" is a C.G.S System unit for 'Magnetomotive Force' expressed as \(Oe-cm\).
unit:OHM
URI: http://qudt.org/vocab/unit/OHM
The \textit{ohm} is the SI derived unit of electrical resistance, named after German physicist Georg Simon Ohm. \(\Omega \equiv\ \frac{\text{V}}{\text{A}}\ \equiv\ \frac{\text{volt}}{\text{amp}}\ \equiv\ \frac{\text{W}}{\text {A}^{2}}\ \equiv\ \frac{\text{watt}}{\text{amp}^{2}}\ \equiv\ \frac{\text{H}}{\text {s}}\ \equiv\ \frac{\text{henry}}{\text{second}}\)
unit:OHM_Ab
URI: http://qudt.org/vocab/unit/OHM_Ab
\(\textit{abohm}\) is the basic unit of electrical resistance in the emu-cgs system of units. One abohm is equal to \(10^{-9} ohms\) in the SI system of units; one abohm is a nano ohm.
unit:OHM_Stat
URI: http://qudt.org/vocab/unit/OHM_Stat
"StatOHM" is the unit of resistance, reactance, and impedance in the electrostatic C.G.S system of units, equal to the resistance between two points of a conductor when a constant potential difference of 1 statvolt between these points produces a current of 1 statampere; it is equal to approximately \(8.9876 \times 10^{11} ohms\). The statohm is an extremely large unit of resistance. In fact, an object with a resistance of 1 stat W would make an excellent insulator or dielectric . In practical applications, the ohm, the kilohm (k W ) and the megohm (M W or M) are most often used to quantify resistance.
unit:OZ
URI: http://qudt.org/vocab/unit/OZ
An ounce of mass is 1/16th of a pound of mass, based on the international standard definition of the pound as exactly 0.45359237 kg.
unit:OZ-PER-FT2
URI: http://qudt.org/vocab/unit/OZ-PER-FT2
"Ounce per Square Foot" is an Imperial unit for 'Mass Per Area' expressed as \(oz/ft^{2}\).
unit:OZ-PER-GAL
URI: http://qudt.org/vocab/unit/OZ-PER-GAL
"Ounce per Gallon" is an Imperial unit for 'Density' expressed as \(oz/gal\).
unit:OZ-PER-IN3
URI: http://qudt.org/vocab/unit/OZ-PER-IN3
"Ounce per Cubic Inch" is an Imperial unit for 'Density' expressed as \(oz/in^{3}\).
unit:OZ-PER-YD2
URI: http://qudt.org/vocab/unit/OZ-PER-YD2
"Ounce per Square Yard" is an Imperial unit for 'Mass Per Area' expressed as \(oz/yd^{2}\).
unit:OZ_F
URI: http://qudt.org/vocab/unit/OZ_F
"Ounce Force" is an Imperial unit for 'Force' expressed as \(ozf\).
unit:OZ_F-IN
URI: http://qudt.org/vocab/unit/OZ_F-IN
"Ounce Force Inch" is an Imperial unit for 'Torque' expressed as \(ozf-in\).
unit:OZ_TROY
URI: http://qudt.org/vocab/unit/OZ_TROY
An obsolete unit of mass; the Troy Ounce is 1/12th of a Troy Pound. Based on the international definition of a Troy Pound as 5760 grains, the Troy Ounce is exactly 480 grains, or 0.0311034768 kg.
unit:OZ_VOL_UK
URI: http://qudt.org/vocab/unit/OZ_VOL_UK
\(\textit{Imperial Ounce}\) is an Imperial unit for 'Liquid Volume' expressed as \(oz\).
unit:OZ_VOL_US
URI: http://qudt.org/vocab/unit/OZ_VOL_US
"US Liquid Ounce" is a unit for 'Liquid Volume' expressed as \(oz\).
unit:PA
URI: http://qudt.org/vocab/unit/PA
The SI unit of pressure. The pascal is the standard pressure unit in the MKS metric system, equal to one newton per square meter or one "kilogram per meter per second per second." The unit is named for Blaise Pascal (1623-1662), French philosopher and mathematician, who was the first person to use a barometer to measure differences in altitude.
unit:PA-PER-HR
URI: http://qudt.org/vocab/unit/PA-PER-HR
A rate of change of pressure measured as the number of Pascals in a period of one hour.
unit:PA-PER-MIN
URI: http://qudt.org/vocab/unit/PA-PER-MIN
A rate of change of pressure measured as the number of Pascals in a period of one minute.
unit:PA-PER-SEC
URI: http://qudt.org/vocab/unit/PA-PER-SEC
A rate of change of pressure measured as the number of Pascals in a period of one second.
unit:PA-SEC
URI: http://qudt.org/vocab/unit/PA-SEC
The SI unit of dynamic viscosity, equal to 10 poises or 1000 centipoises.
unit:PA-SEC-PER-M
URI: http://qudt.org/vocab/unit/PA-SEC-PER-M
Pascal Second Per Meter (\(Pa-s/m\)) is a unit in the category of Specific acoustic impedance. It is also known as pascal-second/meter. Pascal Second Per Meter has a dimension of \(ML^2T^{-1}\) where M is mass, L is length, and T is time. It essentially the same as the corresponding standard SI unit \(kg/m2\cdot s\).
unit:PA-SEC-PER-M3
URI: http://qudt.org/vocab/unit/PA-SEC-PER-M3
\(\textit{Pascal Second Per Cubic Meter}\) (\(Pa-s/m^3\)) is a unit in the category of Acoustic impedance. It is also known as \(\textit{pascal-second/cubic meter}\). It has a dimension of \(ML^{-4}T^{-1}\) where \(M\) is mass, \(L\) is length, and \(T\) is time. This unit is the standard SI unit in this category.
unit:PA2-SEC
URI: http://qudt.org/vocab/unit/PA2-SEC
Square Pascal Second (\(Pa^2\cdot s\)) is a unit in the category of sound exposure.
unit:PARSEC
URI: http://qudt.org/vocab/unit/PARSEC
The parsec (parallax of one arcsecond; symbol: pc) is a unit of length, equal to just under 31 trillion (\(31 \times 10^{12}\)) kilometres (about 19 trillion miles), 206265 AU, or about 3.26 light-years. The parsec measurement unit is used in astronomy. It is defined as the length of the adjacent side of an imaginary right triangle in space. The two dimensions that specify this triangle are the parallax angle (defined as 1 arcsecond) and the opposite side (defined as 1 astronomical unit (AU), the distance from the Earth to the Sun). Given these two measurements, along with the rules of trigonometry, the length of the adjacent side (the parsec) can be found.
unit:PCA
URI: http://qudt.org/vocab/unit/PCA
A pica is a typographic unit of measure corresponding to 1/72 of its respective foot, and therefore to 1/6 of an inch. The pica contains 12 point units of measure. Notably, Adobe PostScript promoted the pica unit of measure that is the standard in contemporary printing, as in home computers and printers. Usually, pica measurements are represented with an upper-case 'P' with an upper-right-to-lower-left virgule (slash) starting in the upper right portion of the 'P' and ending at the lower left of the upright portion of the 'P'; essentially drawing a virgule (/) through a 'P'. Note that these definitions are different from a typewriter's pica setting, which denotes a type size of ten characters per horizontal inch.
unit:PDL
URI: http://qudt.org/vocab/unit/PDL
The poundal is a unit of force that is part of the foot-pound-second system of units, in Imperial units introduced in 1877, and is from the specialized subsystem of English absolute (a coherent system). The poundal is defined as the force necessary to accelerate 1 pound-mass to 1 foot per second per second. \(1 pdl = 0.138254954376 N\) exactly.
unit:PDL-PER-FT2
URI: http://qudt.org/vocab/unit/PDL-PER-FT2
Poundal Per Square Foot (\(pdl/ft^2\)) is a unit in the category of Pressure. It is also known as poundals per square foot, poundal/square foot. This unit is commonly used in the UK, US unit systems. Poundal Per Square Foot has a dimension of \(ML^{-1}T^{-2}\), where M is mass, L is length, and T is time. It can be converted to the corresponding standard SI unit \si{Pa} by multiplying its value by a factor of 1.488163944.
unit:PER-GigaEV2
URI: http://qudt.org/vocab/unit/PER-GigaEV2
Per Square Giga Electron Volt Unit is a denominator unit with dimensions \(/GeV^2\).
unit:PER-HR
URI: http://qudt.org/vocab/unit/PER-HR
A reciprocal unit of time for \(\textit{reciprocal hour}\) or "inverse hour".
unit:PER-K
URI: http://qudt.org/vocab/unit/PER-K
Per Kelvin Unit is a denominator unit with dimensions \(/k\).
unit:PER-KiloM
URI: http://qudt.org/vocab/unit/PER-KiloM
Per Kilometer Unit is a denominator unit with dimensions \(/km\).
unit:PER-M
URI: http://qudt.org/vocab/unit/PER-M
Per Meter Unit is a denominator unit with dimensions \(/m\).
unit:PER-M-K
URI: http://qudt.org/vocab/unit/PER-M-K
Per Meter Kelvin Unit is a denominator unit with dimensions \(/m.k\).
unit:PER-M2
URI: http://qudt.org/vocab/unit/PER-M2
"Per Square Meter" is a denominator unit with dimensions \(/m^2\).
unit:PER-M3
URI: http://qudt.org/vocab/unit/PER-M3
"Per Cubic Meter" is a denominator unit with dimensions \(/m^3\).
unit:PER-MIN
URI: http://qudt.org/vocab/unit/PER-MIN
A reciprocal unit of time for \(\textit{reciprocal minute}\) or \(\textit{inverse minute}\).
unit:PER-MOL
URI: http://qudt.org/vocab/unit/PER-MOL
Per Mole Unit is a denominator unit with dimensions \(mol^{-1}\)
.unit:PER-MicroM
URI: http://qudt.org/vocab/unit/PER-MicroM
Per Micrometer Unit is a denominator unit with dimensions \(/microm\).
unit:PER-MicroMOL-L
URI: http://qudt.org/vocab/unit/PER-MicroMOL-L
Units used to describe the sensitivity of detection of a spectrophotometer.
unit:PER-MilliM
URI: http://qudt.org/vocab/unit/PER-MilliM
Per Millimeter Unit is a denominator unit with dimensions \(/mm\).
unit:PER-NanoM
URI: http://qudt.org/vocab/unit/PER-NanoM
Per Nanometer Unit is a denominator unit with dimensions \(/nm\).
unit:PER-PicoM
URI: http://qudt.org/vocab/unit/PER-PicoM
Per Picoometer Unit is a denominator unit with dimensions \(/pm\).
unit:PER-PlanckMass2
URI: http://qudt.org/vocab/unit/PER-PlanckMass2
In physics, the Planck mass, denoted by \(m_P\), is the unit of mass in the system of natural units known as Planck units. It is defined so that \(\approx 1.2209 \times 10 GeV/c_0 = 2.17651(13) \times 10 kg\), (or \(21.7651 \mu g\)), where \(c_0\) is the speed of light in a vacuum, \(G\) is the gravitational constant, and \(\hbar\) is the reduced Planck constant. Particle physicists and cosmologists often use the reduced Planck mass, which is \(\approx 4.341 \times 10 kg = 2.435 \times 10 GeV/c\). The added factor of \(1/{\sqrt{8\pi}}\) simplifies a number of equations in general relativity. Quantum effects are typified by the magnitude of Planck's constant.
unit:PER-SEC
URI: http://qudt.org/vocab/unit/PER-SEC
A reciprical unit of time for \(\textit{reciprocal second}\) or \(\textit{inverse second}\). The \(\textit{Per Second}\) is a unit of rate.
unit:PER-SEC-M2
URI: http://qudt.org/vocab/unit/PER-SEC-M2
\(\textit{Per Second Square Meter}\) is a measure of flux with dimensions \(/sec-m^2\).
unit:PER-SEC-M2-SR
URI: http://qudt.org/vocab/unit/PER-SEC-M2-SR
Per Second Square Meter Steradian is a denominator unit with dimensions \(/sec-m^2-sr\).
It is not clear this unit is ever used. [Editor]
unit:PER-SEC-SR
URI: http://qudt.org/vocab/unit/PER-SEC-SR
Per Second Steradian Unit is a denominator unit with dimensions \(/sec-sr\).
unit:PER-T-M
URI: http://qudt.org/vocab/unit/PER-T-M
Per Tesla Meter Unit is a denominator unit with dimensions \(/m .\cdot T\).
unit:PER-T-SEC
URI: http://qudt.org/vocab/unit/PER-T-SEC
Per Tesla Second Unit is a denominator unit with dimensions \(/s . T\).
unit:PERCENT
URI: http://qudt.org/vocab/unit/PERCENT
"Percent" is a unit for 'Dimensionless Ratio' expressed as \(\%\).
unit:PERCENT-PER-WK
URI: http://qudt.org/vocab/unit/PERCENT-PER-WK
A rate of change in percent over a period of 7 days
unit:PERMEABILITY_EM_REL
URI: http://qudt.org/vocab/unit/PERMEABILITY_EM_REL
Relative permeability, denoted by the symbol \(\mu _T\), is the ratio of the permeability of a specific medium to the permeability of free space \(\mu _0\)
unit:PERMEABILITY_REL
URI: http://qudt.org/vocab/unit/PERMEABILITY_REL
In multiphase flow in porous media, the relative permeability of a phase is a dimensionless measure of the effective permeability of that phase. It is the ratio of the effective permeability of that phase to the absolute permeability. It can be viewed as an adaptation of Darcy's law to multiphase flow. For two-phase flow in porous media given steady-state conditions, we can write where is the flux, is the pressure drop, is the viscosity.
unit:PERMITTIVITY_REL
URI: http://qudt.org/vocab/unit/PERMITTIVITY_REL
The \(\textit{relative permittivity}\) of a material under given conditions reflects the extent to which it concentrates electrostatic lines of flux. In technical terms, it is the ratio of the amount of electrical energy stored in a material by an applied voltage, relative to that stored in a vacuum. Likewise, it is also the ratio of the capacitance of a capacitor using that material as a dielectric, compared to a similar capacitor that has a vacuum as its dielectric. Relative permittivity is a dimensionless number that is in general complex. The imaginary portion of the permittivity corresponds to a phase shift of the polarization P relative to E and leads to the attenuation of electromagnetic waves passing through the medium.
\(\epsilon_r(w) = \frac{\epsilon(w)}{\epsilon_O}\)\ where \(\epsilon_r(w)\) is the complex frequency-dependent absolute permittivity of the material, and \(\epsilon_O\) is the vacuum permittivity.
unit:PH
URI: http://qudt.org/vocab/unit/PH
the negative decadic logarithmus of the concentration of free protons (or hydronium ions) expressed in 1 mol/l.
Unsure about dimensionality of pH; conversion requires a log function not just a multiplier
unit:PHOT
URI: http://qudt.org/vocab/unit/PHOT
A phot (ph) is a photometric unit of illuminance, or luminous flux through an area. It is not an SI unit, but rather is associated with the older centimetre gram second system of units. Metric dimensions: \(illuminance = luminous intensity \times solid angle / length\).
unit:PINT
URI: http://qudt.org/vocab/unit/PINT
"Imperial Pint" is an Imperial unit for 'Volume' expressed as \(pint\).
unit:PINT_US
URI: http://qudt.org/vocab/unit/PINT_US
"US Liquid Pint" is a unit for 'Liquid Volume' expressed as \(pt\).
unit:PINT_US_DRY
URI: http://qudt.org/vocab/unit/PINT_US_DRY
"US Dry Pint" is a C.G.S System unit for 'Dry Volume' expressed as \(dry_pt\).
unit:PK_US_DRY
URI: http://qudt.org/vocab/unit/PK_US_DRY
A peck is an imperial and U.S. customary unit of dry volume, equivalent to 2 gallons or 8 dry quarts or 16 dry pints. Two pecks make a kenning (obsolete), and four pecks make a bushel. In Scotland, the peck was used as a dry measure until the introduction of imperial units as a result of the Weights and Measures Act of 1824. The peck was equal to about 9 litres (in the case of certain crops, such as wheat, peas, beans and meal) and about 13 litres (in the case of barley, oats and malt). A firlot was equal to 4 pecks and the peck was equal to 4 lippies or forpets.
unit:POISE
URI: http://qudt.org/vocab/unit/POISE
The poise is the unit of dynamic viscosity in the centimetre gram second system of units. It is named after Jean Louis Marie Poiseuille.
unit:PPB
URI: http://qudt.org/vocab/unit/PPB
Dimensionless unit for concentration. Recommended practice is to use specific units such as \(ug/l\).
unit:PPM
URI: http://qudt.org/vocab/unit/PPM
Dimensionless unit for concentration. Recommended practice is to use specific units such as \(ug/l\).
unit:PPTH
URI: http://qudt.org/vocab/unit/PPTH
Dimensionless unit for concentration. Recommended practice is to use specific units such as \(ug/l\).
unit:PPTR
URI: http://qudt.org/vocab/unit/PPTR
Dimensionless unit for concentration. Recommended practice is to use specific units such as \(ug/l\).
unit:PSU
URI: http://qudt.org/vocab/unit/PSU
Practical salinity scale 1978 (PSS-78) is used for ionic content of seawater determined by electrical conductivity. Salinities measured using PSS-78 do not have units, but are approximately scaled to parts-per-thousand for the valid range. The suffix psu or PSU (denoting practical salinity unit) is sometimes added to PSS-78 measurement values. The addition of PSU as a unit after the value is "formally incorrect and strongly discouraged".
unit:PT
URI: http://qudt.org/vocab/unit/PT
In typography, a point is the smallest unit of measure, being a subdivision of the larger pica. It is commonly abbreviated as pt. The point has long been the usual unit for measuring font size and leading and other minute items on a printed page.
unit:Pataca
URI: http://qudt.org/vocab/unit/Pataca
Macau Special Administrative Region
unit:PebiBYTE
URI: http://qudt.org/vocab/unit/PebiBYTE
The pebibyte is a standards-based binary multiple (prefix pebi, symbol Pi) of the byte, a unit of digital information storage. The pebibyte unit symbol is PiB. 1 pebibyte = 1125899906842624bytes = 1024 tebibytes The pebibyte is closely related to the petabyte, which is defined as \(10^{15} bytes = 1,000,000,000,000,000 bytes\).
unit:PetaBYTE
URI: http://qudt.org/vocab/unit/PetaBYTE
A petabyte is a unit of information equal to one quadrillion bytes, or 1024 terabytes. The unit symbol for the petabyte is PB. The prefix peta (P) indicates the fifth power to 1000: 1 PB = 1000000000000000B, 1 million gigabytes = 1 thousand terabytes The pebibyte (PiB), using a binary prefix, is the corresponding power of 1024, which is more than \(12\% \)greater (\(2^{50} bytes = 1,125,899,906,842,624 bytes\)).
unit:PicoA-PER-MicroMOL-L
URI: http://qudt.org/vocab/unit/PicoA-PER-MicroMOL-L
Unavailable
unit:PicoFARAD
URI: http://qudt.org/vocab/unit/PicoFARAD
"PicoF" is a common unit of electric capacitance equal to \(10^{-12} farad\). This unit was formerly called the micromicrofarad.
unit:PicoGM
URI: http://qudt.org/vocab/unit/PicoGM
10**-12 grams or one 10**-15 of the SI standard unit of mass (kilogram).
unit:PicoGM-PER-GM
URI: http://qudt.org/vocab/unit/PicoGM-PER-GM
One part per 10**12 (trillion) by mass of the measurand in the matrix.
unit:PicoGM-PER-KiloGM
URI: http://qudt.org/vocab/unit/PicoGM-PER-KiloGM
One part per 10**15 by mass of the measurand in the matrix.
unit:PicoGM-PER-L
URI: http://qudt.org/vocab/unit/PicoGM-PER-L
One 10**15 part of the SI standard unit of mass of the measurand per litre volume of matrix..
unit:PicoGM-PER-MilliL
URI: http://qudt.org/vocab/unit/PicoGM-PER-MilliL
One 10**15 part of the SI standard unit of mass of the measurand per millilitre volume of matrix.
unit:PicoMOL-PER-KiloGM
URI: http://qudt.org/vocab/unit/PicoMOL-PER-KiloGM
Unavailable
unit:PicoMOL-PER-L-DAY
URI: http://qudt.org/vocab/unit/PicoMOL-PER-L-DAY
A change in the quantity of matter of 10^-12 moles in the SI unit of volume scaled by 10^-3 over a period of 86400 seconds.
unit:PicoMOL-PER-L-HR
URI: http://qudt.org/vocab/unit/PicoMOL-PER-L-HR
A change in the quantity of matter of 10^-12 moles in the SI unit of volume scaled by 10^-3 over a period of 3600 seconds.
unit:PicoMOL-PER-M-W-SEC
URI: http://qudt.org/vocab/unit/PicoMOL-PER-M-W-SEC
Unavailable
unit:PicoMOL-PER-M2-DAY
URI: http://qudt.org/vocab/unit/PicoMOL-PER-M2-DAY
Unavailable
unit:PicoMOL-PER-M3-SEC
URI: http://qudt.org/vocab/unit/PicoMOL-PER-M3-SEC
Unavailable
unit:PicoW-PER-CentiM2-L
URI: http://qudt.org/vocab/unit/PicoW-PER-CentiM2-L
The power (scaled by 10^-12) per SI unit of area (scaled by 10^-4) produced per SI unit of volume (scaled by 10^-3).
unit:PlanckCharge
URI: http://qudt.org/vocab/unit/PlanckCharge
In physics, the Planck charge, denoted by, is one of the base units in the system of natural units called Planck units. It is a quantity of electric charge defined in terms of fundamental physical constants. The Planck charge is defined as: coulombs, where: is the speed of light in the vacuum, is Planck's constant, is the reduced Planck constant, is the permittivity of free space is the elementary charge = (137.03599911) is the fine structure constant. The Planck charge is times greater than the elementary charge \(e\) carried by an electron.
unit:PlanckCurrent
URI: http://qudt.org/vocab/unit/PlanckCurrent
The Planck current is the unit of electric current, denoted by IP, in the system of natural units known as Planck units. \(\approx 3.479 \times 10 A\), where: the Planck time is the permittivity in vacuum and the reduced Planck constant G is the gravitational constant c is the speed of light in vacuum. The Planck current is that current which, in a conductor, carries a Planck charge in Planck time. Alternatively, the Planck current is that constant current which, if maintained in two straight parallel conductors of infinite length and negligible circular cross-section, and placed a Planck length apart in vacuum, would produce between these conductors a force equal to a Planck force per Planck length.
unit:PlanckDensity
URI: http://qudt.org/vocab/unit/PlanckDensity
The Planck density is the unit of density, denoted by \(\rho_P\), in the system of natural units known as Planck units. \(1\ \rho_P \ is \approx 5.155 \times 10^{96} kg/m^3\). This is a unit which is very large, about equivalent to \(10^{23}\) solar masses squeezed into the space of a single atomic nucleus. At one unit of Planck time after the Big Bang, the mass density of the universe is thought to have been approximately one unit of Planck density.
unit:PlanckEnergy
URI: http://qudt.org/vocab/unit/PlanckEnergy
In physics, the unit of energy in the system of natural units known as Planck units is called the Planck energy, denoted by \(E_P\). \(E_P\) is a derived, as opposed to basic, Planck unit. An equivalent definition is:\(E_P = \hbar / T_P\) where \(T_P\) is the Planck time. Also: \(E_P = m_P c^2\) where \(m_P\) is the Planck mass.
unit:PlanckForce
URI: http://qudt.org/vocab/unit/PlanckForce
Planck force is the derived unit of force resulting from the definition of the base Planck units for time, length, and mass. It is equal to the natural unit of momentum divided by the natural unit of time.
unit:PlanckImpedance
URI: http://qudt.org/vocab/unit/PlanckImpedance
The Planck impedance is the unit of electrical resistance, denoted by ZP, in the system of natural units known as Planck units. The Planck impedance is directly coupled to the impedance of free space, Z0, and differs in value from Z0 only by a factor of \(4\pi\). If the Planck charge were instead defined to normalize the permittivity of free space, \(\epsilon_0\), rather than the Coulomb constant, \(1/(4\pi\epsilon_0)\), then the Planck impedance would be identical to the characteristic impedance of free space.
unit:PlanckLength
URI: http://qudt.org/vocab/unit/PlanckLength
In physics, the Planck length, denoted \(\ell_P\), is a unit of length, equal to \(1.616199(97)×10^{-35}\) metres. It is a base unit in the system of Planck units. The Planck length can be defined from three fundamental physical constants: the speed of light in a vacuum, Planck's constant, and the gravitational constant.
unit:PlanckMass
URI: http://qudt.org/vocab/unit/PlanckMass
In physics, the Planck mass, denoted by \(m_P\), is the unit of mass in the system of natural units known as Planck units. It is defined so that \(\approx 1.2209 \times 10 GeV/c_0 = 2.17651(13) \times 10 kg\), (or \(21.7651 \mu g\)), where \(c_0\) is the speed of light in a vacuum, \(G\) is the gravitational constant, and \(\hbar\) is the reduced Planck constant. Particle physicists and cosmologists often use the reduced Planck mass, which is \(\approx 4.341 \times 10 kg = 2.435 \times 10 GeV/c\). The added factor of \(1/{\sqrt{8\pi}}\) simplifies a number of equations in general relativity. Quantum effects are typified by the magnitude of Planck's constant.
unit:PlanckMomentum
URI: http://qudt.org/vocab/unit/PlanckMomentum
Planck momentum is the unit of momentum in the system of natural units known as Planck units. It has no commonly used symbol of its own, but can be denoted by, where is the Planck mass and is the speed of light in a vacuum. Then where is the reduced Planck's constant, is the Planck length, is the gravitational constant. In SI units Planck momentum is \(\approx 6.5 kg m/s\).
unit:PlanckPower
URI: http://qudt.org/vocab/unit/PlanckPower
The Planck energy divided by the Planck time is the Planck power \(P_p \), equal to about \(3.62831 \times 10^{52} W\). This is an extremely large unit; even gamma-ray bursts, the most luminous phenomena known, have output on the order of \(1 \times 10^{45} W\), less than one ten-millionth of the Planck power.
unit:PlanckTime
URI: http://qudt.org/vocab/unit/PlanckTime
In physics, the Planck time, denoted by \(t_P\), is the unit of time in the system of natural units known as Planck units. It is the time required for light to travel, in a vacuum, a distance of 1 Planck length. The unit is named after Max Planck, who was the first to propose it. \( \\ t_P \equiv \sqrt{\frac{\hbar G}{c^5}} \approx 5.39106(32) \times 10^{-44} s\) where, \(c\) is the speed of light in a vacuum, \(\hbar\) is the reduced Planck's constant (defined as \(\hbar = \frac{h}{2 \pi}\) and \(G\) is the gravitational constant. The two digits between parentheses denote the standard error of the estimated value.
unit:QT_US
URI: http://qudt.org/vocab/unit/QT_US
"US Liquid Quart" is a unit for 'Liquid Volume' expressed as \(qt\).
unit:QT_US_DRY
URI: http://qudt.org/vocab/unit/QT_US_DRY
"US Dry Quart" is a unit for 'Dry Volume' expressed as \(dry_qt\).
unit:QUAD
URI: http://qudt.org/vocab/unit/QUAD
A quad is a unit of energy equal to \(10 BTU\), or \(1.055 \times \SI{10}{\joule}\), which is \(1.055 exajoule\) or \(EJ\) in SI units. The unit is used by the U.S. Department of Energy in discussing world and national energy budgets. Some common types of an energy carrier approximately equal 1 quad are: 8,007,000,000 Gallons (US) of gasoline 293,083,000,000 Kilowatt-hours (kWh) 36,000,000 Tonnes of coal 970,434,000,000 Cubic feet of natural gas 5,996,000,000 UK gallons of diesel oil 25,200,000 Tonnes of oil 252,000,000 tonnes of TNT or five times the energy of the Tsar Bomba nuclear test.
unit:R
URI: http://qudt.org/vocab/unit/R
Not to be confused with roentgen equivalent man or roentgen equivalent physical. The roentgen (symbol R) is an obsolete unit of measurement for the kerma of X-rays and gamma rays up to 3 MeV.
unit:RAD
URI: http://qudt.org/vocab/unit/RAD
The radian is the standard unit of angular measure, used in many areas of mathematics. It describes the plane angle subtended by a circular arc as the length of the arc divided by the radius of the arc. In the absence of any symbol radians are assumed, and when degrees are meant the symbol \(^{\ circ}\) is used.
The radian and steradian are special names for the number one that may be used to convey information about the quantity concerned. In practice the symbols rad and sr are used where appropriate, but the symbol for the derived unit one is generally omitted in specifying the values of dimensionless quantities.
unit:RAD-PER-HR
URI: http://qudt.org/vocab/unit/RAD-PER-HR
"Radian per Hour" is a unit for 'Angular Velocity' expressed as \(rad/h\).
unit:RAD-PER-MIN
URI: http://qudt.org/vocab/unit/RAD-PER-MIN
Radian Per Minute (rad/min) is a unit in the category of Angular velocity. It is also known as radians per minute, radian/minute. Radian Per Minute (rad/min) has a dimension of aT-1 where T is time. It can be converted to the corresponding standard SI unit rad/s by multiplying its value by a factor of 0.0166666666667.
unit:RAD-PER-SEC
URI: http://qudt.org/vocab/unit/RAD-PER-SEC
"Radian per Second" is the SI unit of rotational speed (angular velocity), and, also the unit of angular frequency. The radian per second is defined as the change in the orientation of an object, in radians, every second.
unit:RAD-PER-SEC2
URI: http://qudt.org/vocab/unit/RAD-PER-SEC2
Angular acceleration is the rate of change of angular velocity. In SI units, it is measured in radians per Square second (\(rad/s^2\)), and is usually denoted by the Greek letter \(\alpha\).
unit:RAD_R
URI: http://qudt.org/vocab/unit/RAD_R
The \(rad\) is a deprecated unit of absorbed radiation dose, defined as \(1 rad = 0.01\,Gy = 0.01 J/kg\). It was originally defined in CGS units in 1953 as the dose causing 100 ergs of energy to be absorbed by one gram of matter. It has been replaced by the gray in most of the world. A related unit, the \(roentgen\), was formerly used to quantify the number of rad deposited into a target when it was exposed to radiation. The F-factor can used to convert between rad and roentgens. The material absorbing the radiation can be human tissue or silicon microchips or any other medium (for example, air, water, lead shielding, etc.).
unit:RAYL
URI: http://qudt.org/vocab/unit/RAYL
dcterms:description "\(\textbf{Rayl}\) is one of two units of specific acoustic impedance. When sound waves pass through any physical substance the pressure of the waves causes the particles of the substance to move. The sound specific impedance is the ratio between the sound pressure and the particle velocity it produces. The specific impedance is one rayl if unit pressure produces unit velocity. It is defined as follows: \(1\; rayl = 1 dyn\cdot s\cdot cm^{-3}\) Or in SI as: \(1 \; rayl = 10^{-1}Pa\cdot s\cdot m^{-1}\), which equals \(10\,N \cdot s\cdot m^{-3}\)."""^^qudt:LatexString ;
unit:REM
URI: http://qudt.org/vocab/unit/REM
A Rem is a deprecated unit used to measure the biological effects of ionizing radiation. The rem is defined as equal to 0.01 sievert, which is the more commonly used unit outside of the United States. Equivalent dose, effective dose, and committed dose can all be measured in units of rem. These quantities are products of the absorbed dose in rads and weighting factors. These factors must be selected for each exposure situation; there is no universally applicable conversion constant from rad to rem. A rem is a large dose of radiation, so the millirem (mrem), which is one thousandth of a rem, is often used for the dosages commonly encountered, such as the amount of radiation received from medical x-rays and background sources.
unit:REV
URI: http://qudt.org/vocab/unit/REV
"Revolution" is a unit for 'Plane Angle' expressed as \(rev\).
unit:REV-PER-HR
URI: http://qudt.org/vocab/unit/REV-PER-HR
"Revolution per Hour" is a unit for 'Angular Velocity' expressed as \(rev/h\).
unit:REV-PER-MIN
URI: http://qudt.org/vocab/unit/REV-PER-MIN
"Revolution per Minute" is a unit for 'Angular Velocity' expressed as \(rev/min\).
unit:REV-PER-SEC
URI: http://qudt.org/vocab/unit/REV-PER-SEC
"Revolution per Second" is a unit for 'Angular Velocity' expressed as \(rev/s\).
unit:REV-PER-SEC2
URI: http://qudt.org/vocab/unit/REV-PER-SEC2
"Revolution per Square Second" is a C.G.S System unit for 'Angular Acceleration' expressed as \(rev-per-s^2\).
unit:ROD
URI: http://qudt.org/vocab/unit/ROD
A unit of distance equal to 5.5 yards (16 feet 6 inches).
unit:RT
URI: http://qudt.org/vocab/unit/RT
The register ton is a unit of volume used for the cargo capacity of a ship, defined as 100 cubic feet (roughly 2.83 cubic metres).
unit:RussianRuble
URI: http://qudt.org/vocab/unit/RussianRuble
Russia, Abkhazia, South Ossetia
unit:S
URI: http://qudt.org/vocab/unit/S
\(\textbf{Siemens}\) is the SI unit of electric conductance, susceptance, and admittance. The most important property of a conductor is the amount of current it will carry when a voltage is applied. Current flow is opposed by resistance in all circuits, and by also by reactance and impedance in alternating current circuits. Conductance, susceptance, and admittance are the inverses of resistance, reactance, and impedance, respectively. To measure these properties, the siemens is the reciprocal of the ohm. In other words, the conductance, susceptance, or admittance, in siemens, is simply 1 divided by the resistance, reactance or impedance, respectively, in ohms. The unit is named for the German electrical engineer Werner von Siemens (1816-1892). \(\ \text{Siemens}\equiv\frac{\text{A}}{\text{V}}\equiv\frac{\text{amp}}{\text{volt}}\equiv\frac{\text{F}}{\text {s}}\equiv\frac{\text{farad}}{\text{second}}\)
unit:SAMPLE-PER-SEC
URI: http://qudt.org/vocab/unit/SAMPLE-PER-SEC
The number of discrete samples of some thing per second.
unit:SEC
URI: http://qudt.org/vocab/unit/SEC
The \(Second\) (symbol: \(s\)) is the base unit of time in the International System of Units (SI) and is also a unit of time in other systems of measurement. Between the years1000 (when al-Biruni used seconds) and 1960 the second was defined as \(1/86400\) of a mean solar day (that definition still applies in some astronomical and legal contexts). Between 1960 and 1967, it was defined in terms of the period of the Earth's orbit around the Sun in 1900, but it is now defined more precisely in atomic terms. Under the International System of Units (via the International Committee for Weights and Measures, or CIPM), since 1967 the second has been defined as the duration of \({9192631770}\) periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom.In 1997 CIPM added that the periods would be defined for a caesium atom at rest, and approaching the theoretical temperature of absolute zero, and in 1999, it included corrections from ambient radiation.
unit:SEC-FT2
URI: http://qudt.org/vocab/unit/SEC-FT2
"Second Square Foot" is an Imperial unit for 'Area Time' expressed as \(s-ft^{2}\).
unit:SEC2
URI: http://qudt.org/vocab/unit/SEC2
"Square Second" is a unit for 'Square Time' expressed as \(s^{2}\).
unit:SH
URI: http://qudt.org/vocab/unit/SH
A shake is an informal unit of time equal to 10 nanoseconds. It has applications in nuclear physics, helping to conveniently express the timing of various events in a nuclear explosion. The typical time required for one step in the chain reaction (i.e. the typical time for each neutron to cause a fission event which releases more neutrons) is of order 1 shake, and the chain reaction is typically complete by 50 to 100 shakes.
unit:SHANNON
URI: http://qudt.org/vocab/unit/SHANNON
The "Shannon" is a unit of information.
unit:SHANNON-PER-SEC
URI: http://qudt.org/vocab/unit/SHANNON-PER-SEC
The "Shannon per Second" is a unit of information rate.
unit:SLUG
URI: http://qudt.org/vocab/unit/SLUG
The slug is a unit of mass associated with Imperial units. It is a mass that accelerates by \(1 ft/s\) when a force of one pound-force (\(lbF\)) is exerted on it. With standard gravity \(gc = 9.80665 m/s\), the international foot of \(0.3048 m\) and the avoirdupois pound of \(0.45359237 kg\), one slug therefore has a mass of approximately \(32.17405 lbm\) or \(14.593903 kg\). At the surface of the Earth, an object with a mass of 1 slug exerts a force of about \(32.17 lbF\) or \(143 N\).
unit:SLUG-PER-FT
URI: http://qudt.org/vocab/unit/SLUG-PER-FT
"Slug per Foot" is an Imperial unit for 'Mass Per Length' expressed as \(slug/ft\).
unit:SLUG-PER-FT-SEC
URI: http://qudt.org/vocab/unit/SLUG-PER-FT-SEC
\(\textbf{Slug per Foot Second} is a unit for 'Dynamic Viscosity' expressed as \(slug/(ft-s)\).
unit:SLUG-PER-FT2
URI: http://qudt.org/vocab/unit/SLUG-PER-FT2
"Slug per Square Foot" is an Imperial unit for 'Mass Per Area' expressed as \(slug/ft^{2}\).
unit:SLUG-PER-FT3
URI: http://qudt.org/vocab/unit/SLUG-PER-FT3
"Slug per Cubic Foot" is an Imperial unit for 'Density' expressed as \(slug/ft^{3}\).
unit:SLUG-PER-SEC
URI: http://qudt.org/vocab/unit/SLUG-PER-SEC
"Slug per Second" is an Imperial unit for 'Mass Per Time' expressed as \(slug/s\).
unit:SR
URI: http://qudt.org/vocab/unit/SR
The steradian (symbol: sr) is the SI unit of solid angle. It is used to describe two-dimensional angular spans in three-dimensional space, analogous to the way in which the radian describes angles in a plane. The radian and steradian are special names for the number one that may be used to convey information about the quantity concerned. In practice the symbols rad and sr are used where appropriate, but the symbol for the derived unit one is generally omitted in specifying the values of dimensionless quantities.
unit:ST
URI: http://qudt.org/vocab/unit/ST
\(\textbf{Stokes (St)}\) is a unit in the category of Kinematic viscosity. This unit is commonly used in the cgs unit system. Stokes (St) has a dimension of \(L^2T^{-1}\) where \(L\) is length, and \(T\) is time. It can be converted to the corresponding standard SI unit \(m^2/s\) by multiplying its value by a factor of 0.0001.
unit:STILB
URI: http://qudt.org/vocab/unit/STILB
\(The \textit{stilb (sb)} is the CGS unit of luminance for objects that are not self-luminous. It is equal to one candela per square centimeter or 10 nits (candelas per square meter). The name was coined by the French physicist A. Blondel around 1920. It comes from the Greek word stilbein meaning 'to glitter'. It was in common use in Europe up to World War I. In North America self-explanatory terms such as candle per square inch and candle per square meter were more common. The unit has since largely been replaced by the SI unit: candela per square meter.\)
unit:STR
URI: http://qudt.org/vocab/unit/STR
The stere is a unit of volume in the original metric system equal to one cubic metre. The stere is typically used for measuring large quantities of firewood or other cut wood, while the cubic meter is used for uncut wood. It is not part of the modern metric system (SI). In Dutch there's also a kuub, short for kubieke meter which is similar but different.
unit:SV
URI: http://qudt.org/vocab/unit/SV
Although the sievert has the same dimensions as the gray (i.e. joules per kilogram), it measures a different quantity. To avoid any risk of confusion between the absorbed dose and the equivalent dose, the corresponding special units, namely the gray instead of the joule per kilogram for absorbed dose and the sievert instead of the joule per kilogram for the dose equivalent, should be used.
unit:S_Ab
URI: http://qudt.org/vocab/unit/S_Ab
The CGS electromagnetic unit of conductance; one absiemen is the conductance at which a potential of one abvolt forces a current of one abampere; equal to \(10^{9}\) siemens. One siemen is the conductance at which a potential of one volt forces a current of one ampere and named for Karl Wilhem Siemens.
unit:S_Stat
URI: http://qudt.org/vocab/unit/S_Stat
The unit of conductance, admittance, and susceptance in the centimeter-gram-second electrostatic system of units.
unit:SaintHelenaPound
URI: http://qudt.org/vocab/unit/SaintHelenaPound
Saint Helena
unit:SolarMass
URI: http://qudt.org/vocab/unit/SolarMass
The astronomical unit of mass is the solar mass.The symbol \(S\) is often used in astronomy to refer to this unit, although \(M_{\odot}\) is also common. The solar mass, \(1.98892 \time 1030 kg\), is a standard way to express mass in astronomy, used to describe the masses of other stars and galaxies. It is equal to the mass of the Sun, about 333,000 times the mass of the Earth or 1,048 times the mass of Jupiter. In practice, the masses of celestial bodies appear in the dynamics of the solar system only through the products GM, where G is the constant of gravitation.
unit:SolomonIslandsDollar
URI: http://qudt.org/vocab/unit/SolomonIslandsDollar
Solomon Islands
unit:SouthAfricanRand
URI: http://qudt.org/vocab/unit/SouthAfricanRand
South Africa
unit:SpecialDrawingRights
URI: http://qudt.org/vocab/unit/SpecialDrawingRights
International Monetary Fund
unit:SwissFranc
URI: http://qudt.org/vocab/unit/SwissFranc
Switzerland, Liechtenstein
unit:T
URI: http://qudt.org/vocab/unit/T
The SI unit of flux density (or field intensity) for magnetic fields (also called the magnetic induction). The intensity of a magnetic field can be measured by placing a current-carrying conductor in the field. The magnetic field exerts a force on the conductor, a force which depends on the amount of the current and on the length of the conductor. One tesla is defined as the field intensity generating one newton of force per ampere of current per meter of conductor. Equivalently, one tesla represents a magnetic flux density of one weber per square meter of area. A field of one tesla is quite strong: the strongest fields available in laboratories are about 20 teslas, and the Earth's magnetic flux density, at its surface, is about 50 microteslas. The tesla, defined in 1958, honors the Serbian-American electrical engineer Nikola Tesla (1856-1943), whose work in electromagnetic induction led to the first practical generators and motors using alternating current. \(T = V\cdot s \cdot m^{-2} = N\cdot A^{-1}\cdot m^{-1} = Wb\cdot m^{-1} = kg \cdot C^{-1}\cdot s^{-1}\cdot A^{-1} = kg \cdot s^{-2}\cdot A^{-1} = N \cdot s \cdot C^{-1}\cdot m^{-1}\) where, \(\\\) \(A\) = ampere, \(C\)=coulomb, \(m\) = meter, \(N\) = newton, \(s\) = second, \(T\) = tesla, \(Wb\) = weber
unit:TBSP
URI: http://qudt.org/vocab/unit/TBSP
In the US and parts of Canada, a tablespoon is the largest type of spoon used for eating from a bowl. In the UK and most Commonwealth countries, a tablespoon is a type of large spoon usually used for serving. In countries where a tablespoon is a serving spoon, the nearest equivalent to the US tablespoon is either the dessert spoon or the soup spoon. A tablespoonful, nominally the capacity of one tablespoon, is commonly used as a measure of volume in cooking. It is abbreviated as T, tb, tbs, tbsp, tblsp, or tblspn. The capacity of ordinary tablespoons is not regulated by law and is subject to considerable variation. In most countries one level tablespoon is approximately 15 mL; in Australia it is 20 mL.
unit:TEX
URI: http://qudt.org/vocab/unit/TEX
\textit{Tex is a unit of measure for the linear mass density of fibers and is defined as the mass in grams per 1000 meters. Tex is more likely to be used in Canada and Continental Europe, while denier remains more common in the United States and United Kingdom. The unit code is 'tex'. The most commonly used unit is actually the decitex, abbreviated dtex, which is the mass in grams per 10,000 meters. When measuring objects that consist of multiple fibers the term 'filament tex' is sometimes used, referring to the mass in grams per 1000 meters of a single filament. Tex is used for measuring fiber size in many products, including cigarette filters, optical cable, yarn, and fabric.}
unit:THM_US
URI: http://qudt.org/vocab/unit/THM_US
\(\textbf{Therm} (symbol \(thm\)) is a non-SI unit of heat energy. It was defined in the United States in 1968 as the energy equivalent of burning 100 cubic feet of natural gas at standard temperature and pressure. In the US gas industry its SI equivalent is defined as exactly \(100,000 BTU59^\circ F\) or \(105.4804 megajoules\). Public utilities in the U.S. use the therm unit for measuring customer usage of gas and calculating the monthly bills.
unit:TOE
URI: http://qudt.org/vocab/unit/TOE
The tonne of oil equivalent (toe) is a unit of energy: the amount of energy released by burning one tonne of crude oil, approximately 42 GJ (as different crude oils have different calorific values, the exact value of the toe is defined by convention; unfortunately there are several slightly different definitions as discussed below). The toe is sometimes used for large amounts of energy, as it can be more intuitive to visualise, say, the energy released by burning 1000 tonnes of oil than 42,000 billion joules (the SI unit of energy). Multiples of the toe are used, in particular the megatoe (Mtoe, one million toe) and the gigatoe (Gtoe, one billion toe).
unit:TON_Assay
URI: http://qudt.org/vocab/unit/TON_Assay
In the United States, a unit of mass, approximately \(29.167\, grams\). The number of milligrams of precious metal in one assay ton of the ore being tested is equal to the number of troy ounces of pure precious metal in one 2000-pound ton of the ore. i.e. a bead is obtained that weights 3 milligrams, thus the precious metals in the bead would equal three troy ounces to each ton of ore with the understanding that this varies considerably in the real world as the amount of precious values in each ton of ore varies considerably.
unit:TON_LONG
URI: http://qudt.org/vocab/unit/TON_LONG
Long ton (weight ton or imperial ton) is the name for the unit called the "ton" in the avoirdupois or Imperial system of measurements, as used in the United Kingdom and several other Commonwealth countries. One long ton is equal to 2,240 pounds (1,016 kg), 1.12 times as much as a short ton, or 35 cubic feet (0.9911 m3) of salt water with a density of 64 lb/ft3 (1.025 g/ml).
It has some limited use in the United States, most commonly in measuring the displacement of ships, and was the unit prescribed for warships by the Washington Naval Treaty 1922-for example battleships were limited to a mass of 35,000 long tons (36,000 t; 39,000 short tons).
unit:TON_LONG-PER-YD3
URI: http://qudt.org/vocab/unit/TON_LONG-PER-YD3
The long ton per cubic yard density measurement unit is used to measure volume in cubic yards in order to estimate weight or mass in long tons.
unit:TON_Metric
URI: http://qudt.org/vocab/unit/TON_Metric
The tonne (SI unit symbol: t) is a metric system unit of mass equal to 1,000 kilograms (2,204.6 pounds). It is a non-SI unit accepted for use with SI. To avoid confusion with the ton, it is also known as the metric tonne and metric ton in the United States[3] and occasionally in the United Kingdom. In SI units and prefixes, the tonne is a megagram (Mg), a rarely-used symbol, easily confused with mg, for milligram.
unit:TON_SHORT
URI: http://qudt.org/vocab/unit/TON_SHORT
The short ton is a unit of mass equal to 2,000 pounds (907.18474 kg). In the United States it is often called simply ton without distinguishing it from the metric ton (tonne, 1,000 kilograms / 2,204.62262 pounds) or the long ton (2,240 pounds / 1,016.0469088 kilograms); rather, the other two are specifically noted. There are, however, some U.S. applications for which unspecified tons normally means long tons.
unit:TON_SHORT-PER-HR
URI: http://qudt.org/vocab/unit/TON_SHORT-PER-HR
The short Ton per Hour is a unit used to express a weight processed in a period of time.
unit:TON_SHORT-PER-YD3
URI: http://qudt.org/vocab/unit/TON_SHORT-PER-YD3
The short ton per cubic yard density measurement unit is used to measure volume in cubic yards in order to estimate weight or mass in short tons.
unit:TORR
URI: http://qudt.org/vocab/unit/TORR
The \textit{torr} is a non-SI unit of pressure with the ratio of 760 to 1 standard atmosphere, chosen to be roughly equal to the fluid pressure exerted by a millimeter of mercury, i.e. , a pressure of 1 torr is approximately equal to one millimeter of mercury. Note that the symbol (Torr) is spelled exactly the same as the unit (torr), but the letter case differs. The unit is written lower-case, while the symbol of the unit (Torr) is capitalized (as upper-case), as is customary in metric units derived from names. Thus, it is correctly written either way, and is only incorrect when specification is first made that the word is being used as a unit, or else a symbol of the unit, and then the incorrect letter case for the specified use is employed.
unit:TSP
URI: http://qudt.org/vocab/unit/TSP
A teaspoon is a unit of volume. In the United States one teaspoon as a unit of culinary measure is \(1/3\) tablespoon , that is, \(\approx 4.93 mL\); it is exactly \(1/6 U.S. fl. oz\), \(1/48 \; cup\), and \(1/768 \; U.S. liquid gallon\) (see United States customary units for relative volumes of these other measures) and approximately \(1/3 cubic inch\). For nutritional labeling on food packages in the U.S., the teaspoon is defined as precisely \(5 mL\).
unit:T_Ab
URI: http://qudt.org/vocab/unit/T_Ab
The unit of magnetic induction in the cgs system, \(10^{-4}\,tesla\). Also known as the gauss.
unit:TebiBYTE
URI: http://qudt.org/vocab/unit/TebiBYTE
The tebibyte is a multiple of the unit byte for digital information. The prefix tebi means 1024^4
unit:TeraBYTE
URI: http://qudt.org/vocab/unit/TeraBYTE
The terabyte is a multiple of the unit byte for digital information. The prefix tera means 10^12 in the International System of Units (SI), and therefore 1 terabyte is 1000000000000bytes, or 1 trillion bytes, or 1000 gigabytes. 1 terabyte in binary prefixes is 0.9095 tebibytes, or 931.32 gibibytes. The unit symbol for the terabyte is TB or TByte, but not Tb (lower case b) which refers to terabit.
unit:TonEnergy
URI: http://qudt.org/vocab/unit/TonEnergy
Energy equivalent of one ton of TNT
unit:TrinidadAndTobagoDollar
URI: http://qudt.org/vocab/unit/TrinidadAndTobagoDollar
Trinidad and Tobago
unit:U
URI: http://qudt.org/vocab/unit/U
The unified atomic mass unit (symbol: \(u\)) or dalton (symbol: \(Da\)) is the standard unit that is used for indicating mass on an atomic or molecular scale (atomic mass). It is defined as one twelfth of the mass of an unbound neutral atom of carbon-12 in its nuclear and electronic ground state,[ and has a value of \(1.660538921(73) \times 10^{-27} kg\). One dalton is approximately equal to the mass of one nucleon; an equivalence of saying \(1 g mol^{-1}\). The CIPM have categorised it as a 'non-SI unit' because units values in SI units must be obtained experimentally.
unit:UICFranc
URI: http://qudt.org/vocab/unit/UICFranc
International Union of Railways
unit:UNITLESS
URI: http://qudt.org/vocab/unit/UNITLESS
An explicit unit to say something has no units.
unit:USDollar
URI: http://qudt.org/vocab/unit/USDollar
American Samoa, British Indian Ocean Territory, Ecuador, El Salvador, Guam, Haiti, Marshall Islands, Micronesia, Northern Mariana Islands, Palau, Panama, Puerto Rico, East Timor, Turks and Caicos Islands, United States, Virgin Islands
unit:USDollar-NextDay
URI: http://qudt.org/vocab/unit/USDollar-NextDay
United States
unit:USDollar-SameDay
URI: http://qudt.org/vocab/unit/USDollar-SameDay
United States
unit:UnitPole
URI: http://qudt.org/vocab/unit/UnitPole
A magnetic pole is a unit pole if it exerts a force of one dyne on another pole of equal strength at a distance of 1 cm. The strength of any given pole in cgs units is therefore numerically equal to the force in dynes which it exerts on a unit pole 1 cm away.
unit:V
URI: http://qudt.org/vocab/unit/V
\(\textit{Volt} is the SI unit of electric potential. Separating electric charges creates potential energy, which can be measured in energy units such as joules. Electric potential is defined as the amount of potential energy present per unit of charge. Electric potential is measured in volts, with one volt representing a potential of one joule per coulomb of charge. The name of the unit honors the Italian scientist Count Alessandro Volta (1745-1827), the inventor of the first battery. The volt also may be expressed with a variety of other units. For example, a volt is also equal to one watt per ampere (W/A) and one joule per ampere per second (J/A/s).\)
unit:V-PER-M
URI: http://qudt.org/vocab/unit/V-PER-M
Volt Per Meter (V/m) is a unit in the category of Electric field strength. It is also known as volts per meter, volt/meter, volt/metre, volt per metre, volts per metre. This unit is commonly used in the SI unit system. Volt Per Meter (V/m) has a dimension of \(MLT^{-3}I^{-1}\) where M is mass, L is length, T is time, and I is electric current. This unit is the standard SI unit in this category.
unit:V-PER-M2
URI: http://qudt.org/vocab/unit/V-PER-M2
The divergence at a particular point in a vector field is (roughly) how much the vector field 'spreads out' from that point. Operationally, we take the partial derivative of each of the field with respect to each of its space variables and add all the derivatives together to get the divergence. Electric field (V/m) differentiated with respect to distance (m) yields \(V/(m^2)\).
unit:V-PER-SEC
URI: http://qudt.org/vocab/unit/V-PER-SEC
'Volt per Second' is a unit of magnetic flux equaling one weber. This is the flux passing through a conducting loop and reduced to zero at a uniform rate in one second inducing an electric potential of one volt in the loop.
unit:V_Ab
URI: http://qudt.org/vocab/unit/V_Ab
A unit of electrical potential equal to one hundred millionth of a volt (\(10^{-8}\,volts\)), used in the centimeter-gram-second (CGS) system of units. One abV is the potential difference that exists between two points when the work done to transfer one abcoulomb of charge between them equals: \(1\,erg\cdot\,1\,abV\,=\,10\,nV\).
unit:V_Ab-PER-CentiM
URI: http://qudt.org/vocab/unit/V_Ab-PER-CentiM
In the electromagnetic centimeter-gram-second system of units, 'abvolt per centimeter' is the unit of electric field strength.
unit:V_Ab-SEC
URI: http://qudt.org/vocab/unit/V_Ab-SEC
The magnetic flux whose expenditure in 1 second produces 1 abvolt per turn of a linked circuit. Technically defined in a three-dimensional system, it corresponds in the four-dimensional electromagnetic sector of the SI system to 10 nWb, and is an impractically small unit. In use for some years, the name was agreed by the International Electrotechnical Committee in 1930, along with a corresponding practical unit, the pramaxwell (or pro-maxwell) = \(10^{8}\) maxwell.
unit:V_Stat
URI: http://qudt.org/vocab/unit/V_Stat
"statvolt" is a unit of voltage and electrical potential used in the cgs system of units. The conversion to the SI system is \(1 statvolt = 299.792458 volts\). The conversion factor 299.792458 is simply the numerical value of the speed of light in m/s divided by 106. The statvolt is also defined in the cgs system as \(1 erg / esu\). It is a useful unit for electromagnetism because one statvolt per centimetre is equal in magnitude to one gauss. Thus, for example, an electric field of one statvolt/cm has the same energy density as a magnetic field of one gauss. Likewise, a plane wave propagating in a vacuum has perpendicular electric and magnetic fields such that for every gauss of magnetic field intensity there is one statvolt/cm of electric field intensity. The abvolt is another option for a unit of voltage in the cgs system.
unit:V_Stat-PER-CentiM
URI: http://qudt.org/vocab/unit/V_Stat-PER-CentiM
One statvolt per centimetre is equal in magnitude to one gauss. For example, an electric field of one statvolt/cm has the same energy density as a magnetic field of one gauss. Likewise, a plane wave propagating in a vacuum has perpendicular electric and magnetic fields such that for every gauss of magnetic field intensity there is one statvolt/cm of electric field intensity. The abvolt is another option for a unit of voltage in the cgs system.
unit:W
URI: http://qudt.org/vocab/unit/W
The SI unit of power. Power is the rate at which work is done, or (equivalently) the rate at which energy is expended. One watt is equal to a power rate of one joule of work per second of time. This unit is used both in mechanics and in electricity, so it links the mechanical and electrical units to one another. In mechanical terms, one watt equals about 0.001 341 02 horsepower (hp) or 0.737 562 foot-pound per second (lbf/s). In electrical terms, one watt is the power produced by a current of one ampere flowing through an electric potential of one volt. The name of the unit honors James Watt (1736-1819), the British engineer whose improvements to the steam engine are often credited with igniting the Industrial Revolution.
unit:W-HR
URI: http://qudt.org/vocab/unit/W-HR
The watt hour is a unit of energy, equal to 3,600 joule.
unit:W-HR-PER-M3
URI: http://qudt.org/vocab/unit/W-HR-PER-M3
The watt hour per cubic meter is a unit of energy density, equal to 3,600 joule per cubic meter.
unit:W-M-PER-M2-SR
URI: http://qudt.org/vocab/unit/W-M-PER-M2-SR
The power per unit area of radiation of a given wavenumber illuminating a target at a given incident angle.
unit:W-PER-CentiM2
URI: http://qudt.org/vocab/unit/W-PER-CentiM2
Watt Per Square Centimeter is a unit of heat flux or thermal flux, the rate of heat energy transfer through a given surface.
unit:W-PER-FT2
URI: http://qudt.org/vocab/unit/W-PER-FT2
Watt Per Square Foot is a unit of heat flux or thermal flux, the rate of heat energy transfer through a given surface.
unit:W-PER-IN2
URI: http://qudt.org/vocab/unit/W-PER-IN2
Watt Per Square Inch is a unit of heat flux or thermal flux, the rate of heat energy transfer through a given surface.
unit:W-PER-K
URI: http://qudt.org/vocab/unit/W-PER-K
Watt Per Kelvin (\(W/K\)) is a unit in the category of Thermal conductivity.
unit:W-PER-M2
URI: http://qudt.org/vocab/unit/W-PER-M2
"Watt per Square Meter} is a unit of irradiance defined as the power received per area. This is a unit in the category of Energy flux. It is also known as watts per square meter, watt per square metre, watts per square metre, watt/square meter, watt/square metre. This unit is commonly used in the SI unit system. Watt Per Square Meter (\(W/m^2\)) has a dimension of \(MT^{-3"\) where M is mass, and T is time. This unit is the standard SI unit in this category.
unit:W-PER-M2-K
URI: http://qudt.org/vocab/unit/W-PER-M2-K
\(\textbf{Watt Per Square Meter Per Kelvin }(\(W m^{-2} K^{-1}\)) is a unit in the category of Thermal heat transfer coefficient. It is also known as watt/square meter-kelvin. This unit is commonly used in the SI unit system. Watt Per Square Meter Per Kelvin (\(W m^{-2} K^{-1}\)) has a dimension of \(MT^{-1}Q^{-1}\) where \(M\) is mass, \(T\) is time, and \(Q\) is temperature. This unit is the standard SI unit in this category.
unit:W-PER-M2-K4
URI: http://qudt.org/vocab/unit/W-PER-M2-K4
Watt Per Square Meter Per Quartic Kelvin (\(W/m2\cdotK4)\) is a unit in the category of light.
unit:W-PER-M2-NanoM-SR
URI: http://qudt.org/vocab/unit/W-PER-M2-NanoM-SR
Unavailable
unit:W-PER-M2-PA
URI: http://qudt.org/vocab/unit/W-PER-M2-PA
Watt Per Square Meter Per Pascal (\(W/m^2-pa\)) is a unit of Evaporative Heat Transfer.
unit:W-PER-M2-SR
URI: http://qudt.org/vocab/unit/W-PER-M2-SR
\(\textbf{Watt per steradian per square metre}\) is the SI unit of radiance (\(W·sr^{-1}·m^{-2}\)), while that of spectral radiance in frequency is the watt per steradian per square metre per hertz (\(W·sr^{-1}·m^{-2}·Hz^{-1}\)) and that of spectral radiance in wavelength is the watt per steradian per square metre, per metre (\(W·sr^{-1}·m^{-3}\)), commonly the watt per steradian per square metre per nanometre (\(W·sr^{-1}·m^{-2}·nm^{-1}\)). It has a dimension of \(ML^{-4}T^{-3}\) where \(M\) is mass, \(L\) is length, and \(T\) is time. This unit is the standard SI unit in this category.
unit:W-PER-SR
URI: http://qudt.org/vocab/unit/W-PER-SR
\(\textbf{Watt Per Steradian (W/sr)}\) is the unit in the category of Radiant intensity. It is also known as watts per steradian. This unit is commonly used in the SI unit system. Watt Per Steradian (W/sr) has a dimension of \(M\cdot L^{-2}\cdot T^{-3}\) where \(M\) is mass, \(L\) is length, and \(T\) is time. This unit is the standard SI unit in this category.
unit:WB
URI: http://qudt.org/vocab/unit/WB
The SI unit of magnetic flux. "Flux" is the rate (per unit of time) at which something crosses a surface perpendicular to the flow. The weber is a large unit, equal to \(10^{8}\) maxwells, and practical fluxes are usually fractions of one weber. The weber is the magnetic flux which, linking a circuit of one turn, would produce in it an electromotive force of 1 volt if it were reduced to zero at a uniform rate in 1 second. In SI base units, the dimensions of the weber are \((kg \cdot m^2)/(s^2 \cdot A)\). The weber is commonly expressed in terms of other derived units as the Tesla-square meter (\(T \cdot m^2\)), volt-seconds (\(V \cdot s\)), or joules per ampere (\(J/A\)).
unit:XAF
URI: http://qudt.org/vocab/unit/XAF
Cameroon, Central African Republic, Congo, Chad, Equatorial Guinea, Gabon
unit:XOF
URI: http://qudt.org/vocab/unit/XOF
Currency of Benin, Burkina Faso, CÔte d'Ivoire, Guinea-Bissau, Mali, Niger, Senegal, Togo
unit:XPF
URI: http://qudt.org/vocab/unit/XPF
French Polynesia, New Caledonia, Wallis and Futuna
unit:YD
URI: http://qudt.org/vocab/unit/YD
A yard is a unit of length in several different systems including United States customary units, Imperial units and the former English units. It is equal to 3 feet or 36 inches. Under an agreement in 1959 between Australia, Canada, New Zealand, South Africa, the United Kingdom and the United States, the yard (known as the "international yard" in the United States) was legally defined to be exactly 0.9144 metres.
unit:YD2
URI: http://qudt.org/vocab/unit/YD2
The square yard is an imperial/US customary unit of area, formerly used in most of the English-speaking world but now generally replaced by the square metre outside of the U.S. , Canada and the U.K. It is defined as the area of a square with sides of one yard in length. (Gaj in Hindi).
unit:YD3
URI: http://qudt.org/vocab/unit/YD3
A cubic yard is an Imperial / U.S. customary unit of volume, used in the United States, Canada, and the UK. It is defined as the volume of a cube with sides of 1 yard in length.
unit:YD3-PER-MIN
URI: http://qudt.org/vocab/unit/YD3-PER-MIN
"Cubic Yard per Minute" is an Imperial unit for 'Volume Per Unit Time' expressed as \(yd^{3}/min\).
unit:YR
URI: http://qudt.org/vocab/unit/YR
A year is any of the various periods equated with one passage of Earth about the Sun, and hence of roughly 365 days. The familiar calendar has a mixture of 365- and 366-day years, reflecting the fact that the time for one complete passage takes about 365¼ days; the precise value for this figure depends on the manner of defining the year.
unit:YR_Sidereal
URI: http://qudt.org/vocab/unit/YR_Sidereal
A sidereal year is the time taken for Sun to return to the same position with respect to the stars of the celestial sphere.
unit:YR_TROPICAL
URI: http://qudt.org/vocab/unit/YR_TROPICAL
A tropical year (also known as a solar year), for general purposes, is the length of time that the Sun takes to return to the same position in the cycle of seasons, as seen from Earth; for example, the time from vernal equinox to vernal equinox, or from summer solstice to summer solstice. Because of the precession of the equinoxes, the seasonal cycle does not remain exactly synchronised with the position of the Earth in its orbit around the Sun. As a consequence, the tropical year is about 20 minutes shorter than the time it takes Earth to complete one full orbit around the Sun as measured with respect to the fixed stars. Since antiquity, astronomers have progressively refined the definition of the tropical year, and currently define it as the time required for the mean Sun's tropical longitude (longitudinal position along the ecliptic relative to its position at the vernal equinox) to increase by 360 degrees (that is, to complete one full seasonal circuit).
unit:YoctoC
URI: http://qudt.org/vocab/unit/YoctoC
A YoctoCoulomb is \(10^{-24} C\).
unit:YottaC
URI: http://qudt.org/vocab/unit/YottaC
A YottaCoulomb is \(10^{24} C\).
unit:Z
URI: http://qudt.org/vocab/unit/Z
In chemistry and physics, the atomic number (also known as the proton number) is the number of protons found in the nucleus of an atom and therefore identical to the charge number of the nucleus. It is conventionally represented by the symbol Z. The atomic number uniquely identifies a chemical element. In an atom of neutral charge, the atomic number is also equal to the number of electrons.
unit:ZeptoC
URI: http://qudt.org/vocab/unit/ZeptoC
A ZeptoCoulomb is \(10^{-21} C\).
unit:ZettaC
URI: http://qudt.org/vocab/unit/ZettaC
A ZettaCoulomb is \(10^{21} C\).
vaem:GMD_QUDT-UNITS-ALL
URI: http://www.linkedmodel.org/schema/vaem#GMD_QUDT-UNITS-ALL
Standard units of measure for all units.