Why does a lift pump fail beyond a particular height?
(A) Since the water in a lift pump is raised by the
atmospheric pressure, the height of the lift pump will be
lower than the height of the water barometer
(B) Beyond a particular height, upward thrust of air becomes
less
(C) The rarefied air at higher heights cannot keep it aloft
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Answer / guest
( A ) Since the water in a lift pump is raised by the
atmospheric pressure, the height of the lift pump will be
lower than the height of the water barometer
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