Regan has an empty glass cup. It has a mass of 0.3 kg. She drops the cup on the ground and it shatters into several pieces. If she collected all of the pieces of the cup, how much mass would all of the pieces have combined?

Question

A.
less than 0.3 kg
B.
exactly 0.3 kg
C.
There is no way to determine the mass of the shattered glass.
D.
more than 0.3 kg

Answer 1

The correct answer is B. exactly 0.3 kg.

When Regan drops the cup and it shatters, the total mass of all the pieces combined will be the same as the mass of the original cup before it broke. Mass is conserved in this situation, so all of the pieces together will still weigh exactly 0.3 kg.