Question

define density and relative density and give its SI unit

Answer 1

mass per unit volume is called density.

si unit kg/m3

, it is a dimensionless quantity and has no unit. Relative density is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material. Specific gravity usually means relative density with respect to water.

Answer 2

Density can be defined as the mass of an object in per cubic meter. The S.I. unit of density kg/m³.

Relative density is the ratio of the density of a substance with the density of water. There is no unit of relative density.