What metal is the part made of if its weight is 3.9 kg and the volume is 500 cm3.

Given:

m = 3.9 kilograms is the mass of the part;

V = 500 cubic centimeters – part volume.

It is required to determine what material the part is made of.

Let’s convert the volume from cubic centimeters to cubic meters:

V = 500 cm ^ 3 = 500 * 10 ^ -6 = 5 * 10 ^ -4 m ^ 3.

Let’s find the density of the metal from which the part is made:

ro = m / V = 3.9 / (5 * 10 ^ -4) = 0.78 * 10 ^ 4 = 7800 kg / m ^ 3.

According to the density table, we find that this value corresponds to iron.

Answer: the part is made of iron.