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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

1.36 m

b

13.6 m

c

0.76 m

d

136 m

answer is C.

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Detailed Solution

Pressure, P = hdg
Reading of mercury barometer, h = 76 cm
Reading of liquid barometer = h'

h′dℓg=hdhgg

h′=76×13600760=1360cm=13.6m

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