Question

When pumping air into a tire, you have to pull back on the pump plunger to fill the pump with air. This increases the volume of the air inside the pump. This increase in volume has what effect on the gases inside the pump?

Question 9 options:

the gas molecules inside the pump are able to spread out more which decreases the pressure of the gas.


the gas molecules inside the pump get compressed and packed closer together which decreases the pressure of the gas.


the gas molecules inside the pump are able to spread out more which increases the pressure of the gas.


the gas molecules inside the pump get compressed and packed closer together which increases the pressure of the gas.

Answer 1

Pulling back on the plunger allows you to put in more air into the pump and the more air you have inside a fixed volume, the greater the pressure becomes. (D)