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8 August, 04:21

Explain why the height of the liquid column in a barometer changes as atmospheric pressure changes.

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  1. 8 August, 04:26
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    760 mm: Because mercury (Hg) is about 13.6-times denser than water, a mercury barometer only needs to be as tall as a water barometer-a more suitable size. Standard atmospheric pressure of 1 atm at sea level (101,325 Pa) corresponds to a column of mercury that is about 760 mm (29.92 in.) A height of a liquid column will get increased or decreased according to the force of the atmospheric pressure ... Pressure (P) is inversely proportional to Area (A). So if the area of the column is lesser then Force (F) of the atmospheric pressure is greater
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