Express the relationship between the C.G.S. and S.I. units of density.

The density of iron is 7800 kg m^-3. What do you understand by this statement?

How are the (i) mass, (ii) volume, and (iii) density of a metallic piece affected, if at all, with increase in temperature?

Complete the following sentences —

(i) Mass = …………… x density

(ii) S.I. unit of density is ……………

(iii) Density of water is …………… kg m^-3

(iv) Density in kg m^-3 = …………… x density in g cm^-3