Will 1 kg of cotton wool and 1 kg of iron have the same volume? Whose volume is bigger? Why?

The volume of the physical body is determined by the formula:

V = m / p, where m is body mass, p is body density. Accordingly, the higher the density, the lower the volume, and vice versa.

The density of cotton wool is from 20 to 100 kg / m ^ 3 (depending on the brand), and the density of iron is 7800 kg / m ^ 3. Since the density of wool is much less than the density of iron, it will take up more volume with the same mass.

Answer: the volume of cotton wool will be larger.