The hollow copper ball has a mass of 890 g with a volume of 150 cm3. Determine the volume of the cavity inside this ball.

Given:

m = 890 grams – mass of a hollow copper ball;

V = 150 cubic centimeters – the volume of the copper ball;

ro = 8.9 grams / cubic centimeter – copper density.

It is required to determine the volume of the cavity in the ball V1 (cubic centimeter).

Let’s calculate what volume the sphere would occupy if there was no cavity in it:

V2 = m / ro = 890 / 8.9 = 100 cubic centimeters.

Then the volume of the cavity inside the copper ball is:

V1 = V – V2 = 150 – 100 = 50 cubic centimeters.

Answer: the volume of the cavity inside the copper ball is 50 cubic centimeters (5 * 10 ^ -5 m ^ 3).