Mass is the product of density and volume (m = D x V) while density is ratio of mass per volume (D = m / V). Summary: 1.Mass is how much matter is present in a particular object. 2.Density is how much mass is present per unit of volume.
asâ¢sert /ÉËsÉrt/USA pronunciation v. [~ + object] 1  to state strongly or positively; declare strongly:asserted his innocence.[~ + (that) clause]asserted that he was innocent of the crime. 2  to make a claim to:Minorities are now asserting their right to be heard.
Definition. Invalid excess of authority or power exercised by an entity. Since the powers exercised by any officer of an organization are limited by the constituting or vesting instrument (such as a memorandum of association), any act outside those limitations is ultra vires and may be challenged in the courts.