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what is absolute pressure |
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Answer» Absolute pressure is the pressure measured with absolute zero taken as a reference. Hence, a perfect vacuum, called absolute zero, is the datum. Gauge pressure is the pressure measured with atmospheric pressure taken as its datum. Absolute pressureis zero-referenced against a perfect vacuum, so it is equal to gaugepressureplus atmosphericpressure. Gaugepressureis zero-referenced against ambient airpressure, so it is equal toabsolute pressureminus atmosphericpressure. Negative signs are usually omitted. |
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