# Resolve RDF Terms

quantitykind:RelativeMassDensity
http://qudt.org/vocab/quantitykind/RelativeMassDensity

### Recommended prefix

quantitykind:

lang:en
Relative Mass Density
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http://en.wikipedia.org/wiki/Relative_density
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http://www.iso.org/iso/catalogue_detail?csnumber=31889
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$$d = \frac{\rho}{\rho_0}$$, where $$\rho$$ is mass density of a substance and $$\rho_0$$ is the mass density of a reference substance under conditions that should be specified for both substances.
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Relative density, or specific gravity, is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material.