Question

1 atmosphere is the force exerted by760mm or 76 cm long column of mercury on an area of 1 cm at 0 Celsius. What does that mean ?​

Answer 1

Answer:

Pressure is defined as force per unit area and is measured in units that have ... a glass tube at least 760 mm long and closed at one end is filled with mercury ... On each square centimeter of the surface, we can visualize a 20-km column of air ... mean standard temperature and pressure or standard conditions (0°C, 1 atm)

Explanation:

Answer 2

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A mercury barometer is a sealed graduated tube containing mercury and a vacuum inverted over a reservoir containing mercury. Thus when said atmospheric pressure is 76 cm of Hg at a place it means that the mercury level in the sealed tube is at 76 cm,which is the normal air pressure at the mean sea level.

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