Explain specific density or relative density of substance.

Explanation

The relative density of a substance is the ratio of its density to the density of water at `46(@)C`. Relative density
`=("Density of substance")/("Density of water at "4^(@)C "temperature")`
For example : Density of aluminium is `2.7xx10^(3)kgm^(-3)`. Density of water at `4^(@)C` temperature is `10^(3)kg//m^(3)`. Hence relative density of aluminium is 2.7.
Relative density is positive , scalar and demensionless physical quantity.
(Density of substance =Relative density `xx` density of water at `4^(@)C` temperature)
The densities of some common fluids are displayed below in table.