In which of the following processes does the system's total mass change?
A) An automobile speeds up.
B) A rubber ball is squeezed.
C) The total mass changes in both of the above processes.
D) The total mass changed in neither of the above processes.

Question

Quizplus · Accepted Answer

In both processes, the total mass changes. In the first process, the automobile's mass increases as it speeds up due to the relativistic increase in mass. In the second process, the rubber ball's mass decreases as it is squeezed due to the loss of air.

In Which of the Following Processes Does the System's Total