Question

absolute pressure and gauge pressure​

Answer 1

Answer:

The simplest way to explain the difference between the two is that absolute pressure uses absolute zero as its zero point, while gauge pressure uses atmospheric pressure as its zero point. Due to varying atmospheric pressure, gauge pressure measurement is not precise, while absolute pressure is always definite.......

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Answer 2

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• ABSOLUTE PRESSURE is measured relative to a full vacuum. In contrast, the pressure that is measured against atmospheric pressure (also known as barometric pressure) is called gauge pressure. A full vacuum has an absolute pressure reading of 0 PSIA and average barometric pressure at sea level is ~14.7 PSIA.

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• GAUGE PRESSURE is the pressure measured relative to the ambient atmospheric pressure. So the air around us has a gauge pressure of 0 millibars/PSI/whatever.

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