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A barometer kept in an elevator accelera...

A barometer kept in an elevator accelerating upward reads 76 cm. The air pressure in the elevator is

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when the elevator is going upwards with ac celeration a, then net ac celeration = `(g+a)`.
therefore , pressure = ` h rho (g+a) dyn e//cm^(2)`
`=(76 xx 13.6 xx (g-a))/(13.6 xx g) cm ` of Hg column, which is greater than 76 cm.
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