Given the density of air is `1.29 kg m^(-3)`. Then, the relative density of air is ________.

If the density of iron is 7.85 g cm^(-3) and density of water is 1000 kg m-3, then the relative density of iron is __________.

Given the volume of air is 1.29 m^(+3) . Then express it in c.c.

The density of air is 1.293 kg m^3 . Express it in cgs units.

If density of a substance is x kg//m^(3) , find its relative density.

If the density of copper is 8.9xx10^(3)kg//m^(3) , find its relative density.