Question

The first law of thermodynamics applies when pumping air into the tire of a bicycle. Which statement best explains why? The pump heats the air, allowing it to flow into the tire. Work performed on the pump pushes air into the tire. Work performed on the tire draws air in from the pump. Pumping air into the tire increases the entropy of the tire.

Answer 1

The first law of thermodynamics applies when pumping air into the tire of a bicycle because work is performed on the tire to push air into it, increasing its internal energy.

Step-by-step explanation:

The first law of thermodynamics applies when pumping air into the tire of a bicycle because the law states that the change in internal energy of a system equals the net heat transfer into the system minus the net work done by the system.

In this case, when air is pumped into the tire, work is performed on the tire to push the air into it.

This work increases the internal energy of the system, which is the tire.