Physics > 2013 > 20
WASSCE
The outlet of a bicycle pump is used to inflate a football. Why does the pressure of the air inside the pump increase as the pump handle is slowly pushed downward at constant temperature?
A.
Momentum of the air molecules are increased
B.
volume occupied by the molecules are increased
C.
frequency of collision of the air molecules with the walls of the pump is increased
D.
molecules are colliding with one another in the system.
Answer: C
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