What is the density of the metal from which the part is made, if its mass is 3.9 kg, and the volume is 0.0005 m3?

Data: m (mass of the part in question) = 3.9 kg; V (part volume) = 0.0005 m3.

The density of the metal of the manufactured part will be equal to the ratio of its mass and volume: ρ = m / V.

Calculation: ρ = 3.9 / 0.0005 = 7800 kg / m3 (corresponds to the table value of the density of iron, steel).

Answer: The part is made of iron (steel) with a density of 7800 kg / m3.