What Is a Unit of Atmospheric Pressure?

Answer

The unit of atmospheric pressure is an international reference pressure which is 101,325 Pa. It was used as a unit of pressure but has since been replaced by the bar which is defined as 100.000 Pa. The 1% difference is not significant as it is within error range of most common pressure gauges.
1 Additional Answer
Unit of atmospheric pressure is the force exerted againsts a surface by the weight. The atmospheric pressure vary with temperature and altitude above sea level.
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