Question

what is density? Also explain about relative density.

Answer 1

Density:
Density is equal to the body mass put in 1 m3 volume. Density of the body is obtained when the body mass is divided by its volume: . The density unit is a kilogram per cubic meter and this is the derived unit.

Relative density:
density of any material is defined as the ratio of its density to that of another material(generally water ), it is called as relative density.For example if density of a oil is 700kg/m3 and that of the water is 1000kg/m3

Answer 2

the ratio of mass and volume is called density. i.e
mass/volume
the relative density of a substance is defined as the density of the substance to the density of water.