Question 11: Density of air is 1.2 kg/m3. Change it to g/cm3.
Ginven density of air,
Now we know that, 1 kg = 1000 g …. (i)
1 m = 100 cm ⇒ 1 m3 = 106cm3 …. (ii)
Substitute for kilogram and meter from equations (i) and (ii),
This is the required equation.