A barometer kept in an elevator accelerating upward reads 76 cm. The air pressure in the elevator is
A barometer kept in an elevator accelerating upward reads 76 cm. The air pressure in the elevator is
(a) 76 cm
(b) < 76 cm
(c) > 76 cm
(d) zero.
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The correct answer is (c) > 76 cm
EXPLANATION:
Since the pressure of the mercury column 76 cm high in the upward accelerating elevator is more than the stationary elevator condition due to the effective g being g+a. So the air pressure in the given elevator is >76 cm.
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