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Q.

The force that is acting ordinarily on a unit area around that point, due to the total height of the air column of the atmosphere above it is known as [[1]] pressure.


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Detailed Solution

The force that is acting ordinarily on a unit area around that point, due to the total height of the air column of the atmosphere above it is known as atmospheric pressure.
The device used to measure the atmospheric pressure in terms of the height of the mercury column is a barometer. A mercury barometer is used to measure the air pressure. 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 force that is acting ordinarily on a unit area around that point, due to the total height of the air column of the atmosphere above it is known as [[1]] pressure.