Three parts – copper, iron and aluminum – have the same volume. which part has

Three parts – copper, iron and aluminum – have the same volume. which part has the greatest mass which is the smallest?

Since the parts have the same volume V and have no voids, their mass will be determined by the formula m = V * ρ, where
ρ is the density of the metal, V is the volume of the part. Metal density ρ is a tabular value for each metal: copper density ρm = 8960 kg / m3, iron density ρzh = 7870 kg / m3, aluminum density ρа = 2700 kg / m3. Since the volume is the same for all parts, it means that the mass will be greater for the metal with a higher density. This means that the mass of the copper part is the largest, then the iron part, the aluminum part has the smallest mass.