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Q.

The device used to measure atmospheric pressure in terms of the height of the mercury column is a barometer. The pressure exerted by a 76 cm high mercury column is measured as


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a

1 atmospheric pressure.

b

2 atmospheric pressure.

c

3 atmospheric pressure.

d

4 atmospheric pressure. 

answer is A.

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Detailed Solution

The device used to measure the atmospheric pressure in terms of the height of the mercury column is a barometer. The pressure exerted by a 76 cm high mercury column is measured as 1 atmospheric pressure.
The device used to measure the atmospheric pressure in terms of the height of the mercury column is a barometer. Because of its high density, mercury is commonly used in barometers. Under normal atmospheric pressure, the mercury column takes a height of 76 cm. Therefore, the pressure exerted by a 76 cm high mercury column is measured as 1 atmospheric pressure.
 

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The device used to measure atmospheric pressure in terms of the height of the mercury column is a barometer. The pressure exerted by a 76 cm high mercury column is measured as