@prefix rdf: . @prefix owl: . @prefix xsd: . @prefix rdfs: . a ; rdfs:isDefinedBy ; rdfs:label "Surface Density"@en ; "The area density (also known as areal density, surface density, or superficial density) of a two-dimensional object is calculated as the mass per unit area."^^rdf:HTML ; , , , , , , ; ; "http://en.wikipedia.org/wiki/Area_density"^^xsd:anyURI ; "http://www.iso.org/iso/catalogue_detail?csnumber=31889"^^xsd:anyURI ; "$\\rho_A = \\frac{dm}{dA}$, where $m$ is mass and $A$ is area."^^ ; "$\\rho_A$"^^ ; "The area density (also known as areal density, surface density, or superficial density) of a two-dimensional object is calculated as the mass per unit area." ; .