4) What is called the ratio between the density of a substances density of water at 4 Degree Centigrade?

5) What is the density of aluminium?

6) Wha is the mass if the density of a body is 7.6 g/cm³ and its volume is 25 cm³?

7) What is the specific gravity of the solid, if density of the solid is 19.5 g/cm³?

8) What is the density (r) in g/cm3 of an iron cube, if it weighs (W) 4.8 kg and volume (V) is 640 cm,³?