Two homogeneous plexiglass balls and cork have the same volume. Determine the ratio of the masses of these balls.

Two homogeneous plexiglass balls and cork have the same volume. Determine the ratio of the masses of these balls. Plexiglas density Po = 1.2 g / cm3, cork density Pp = 240 kg / m3

Let us express the density of plexiglass in the same units as the density of the cork:

Po = 1.2 g / cm3 = 0.0012 kg / cm3 * 1,000,000 cm3 / m3 = 1200 kg / m3.

The volumes of both balls are the same, we denote them by V.

Masses of balls made of plexiglass and cork:

Mo = VPo;

Mп = VPп.

The ratio of the mass of the plexiglass ball to the mass of the cork ball:

Mo / Mp = VPo / VPp = Po / Pp = (1200 kg / m3) / (240 kg / m3) = 5.

Answer: The mass of the plexiglass ball is 5 times the mass of the cork ball.