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.
1 (v. t.) To struggle against; to resist. ( v. t.) To oppose by argument or assertion; to attempt to overthrow; to controvert; to express dissent or opposition to; to call in question; to deny the truth or validity of; as, to dispute assertions or arguments.