Q.

A barometer is constructed using a liquid (density = 760 kg/m3). What would be the height of the liquid column, when a mercury barometer reads 76 cm? (density of mercury = 13600 kg/m3)

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a

0.76 m

b

1.36 m

c

13.6 m

d

136 m

answer is C.

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Detailed Solution

Pressure, P = hdgReading of mercury barometer, h = 76 cmReading of liquid barometer = h'h′dℓg=hdhggh′=76×13600760=1360cm=13.6m
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A barometer is constructed using a liquid (density = 760 kg/m3). What would be the height of the liquid column, when a mercury barometer reads 76 cm? (density of mercury = 13600 kg/m3)