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Q.

A cycle pump gets hot near the nozzle after a few quick strokes even if they are smooth because:

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a

the volume of air decreases at constant pressure

b

the number of air molecules increases

c

the piston causes lot of friction

d

the process is so quick that exchange of heat with the environment does not take place. An adiabatic compression causes increase in temperature

answer is D.

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Detailed Solution

In adiabatic compression internal energy will be increased which results increase in temperature.
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