. "Bulk Modulus"@en . "The bulk modulus of a substance measures the substance's resistance to uniform compression. It is defined as the ratio of the infinitesimal pressure increase to the resulting relative decrease of the volume." . . "http://en.wikipedia.org/wiki/Bulk_modulus"^^ . "\\(K = \\frac{p}{\\vartheta}\\), where \\(p\\) is pressure and \\(\\vartheta\\) is volume strain."^^ . "K" . . . "http://www.iso.org/iso/catalogue_detail?csnumber=31889"^^ . .