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?

9) What is the volume (V) of mercury in cm3, if mass (m) of mercury is 1 kg and density (r) is 13.6 g/cm³?

10) What is the mass in gram, if a force of 15 dyres acting on a mass m producing an acceleration of 2.5 cm/sec²?

11) What is the specific gravity of the metal, if the piece of metal weighs 150 grams in air and 125 grams in water?