Determine the density of the metal if a part weighing 1400 g made from it has a volume of 200 cm3.

m = 1400 g = 1.4 kg.

V = 200 cm3 = 0.0002 m3.

ρ -?

The density of a substance ρ is the ratio of the mass of a substance m to its volume V: ρ = m / V.

ρ = 1.4 kg / 0.0002 m3 = 7000 kg / m3.

The physical meaning of the density of the substance ρ: the density of the substance ρ shows the mass of the substance taken in the volume V = 1 m3.

A metal with a volume of V = 1 m3 will have a mass of m = 7000 kg.

Answer: the metal has a density ρ = 7000 kg / m3.