The density of the iron body is 7.8 g / cm³, and that of the aluminum body is 2,700 kg / m³.

The density of the iron body is 7.8 g / cm³, and that of the aluminum body is 2,700 kg / m³. Which body has a higher density?

To compare the densities of bodies, let us reduce all values to one unit of measurement (for the SI system – kg / m ^ 3).

ρzh (iron) = 7.8 g / cm ^ 3 = 7.8 * 10 ^ -3 / 10 ^ -6 = 7800 kg / m ^ 3; ρа (aluminum) = 2700 kg / m ^ 3.

ρw (7800 kg / m ^ 3)> ρа (2700 kg / m ^ 3), therefore, the density of the iron body is higher.