A cycle pump becomes hot near the nozzle after a few quick strokes

PHYSICS · Single correct · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics

Problem

A cycle pump becomes hot near the nozzle after a few quick strokes, even if they are smooth, because (1) the volume of air decreases (2) the number of air molecules increases (3) the compression is adiabatic (4) collisions between air particles increase

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