A barometer kept in an elevator reads 76 cm when it is at rest. If the elevator goes up with increasing speed, the reading will be ______.

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A barometer kept in an elevator reads 76 cm when it is at rest. If the elevator goes up with increasing speed, the reading will be > 76 cm. If the elevator goes up at an increasing speed, then the effective value of g increases. We know: P = ρgh So, h will have a lesser value for the same value of P if g increases.

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