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when you take a tire gauge from your glove compartment and measure a pressure of 34psi,...

when you take a tire gauge from your glove compartment and measure a pressure of 34psi, the absolute pressure of the gas un your car's tire id actually how many psi?
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Answer #1

Gauge pressure instruments are calibrated with the local atmosphere pressure, that is, gauge pressure instrument shows zero value at the atmosphere. Thus absolute pressure is the sum of gauge pressure and the atmospheric pressure. The standard value of atmospheric pressure is 14.6959 psi.

Absolute pressure inside the tire is = gauge pressure reading + atmospheric pressure

Absolute pressure inside the tire = 34 psi + 14.6959 psi

Absolute pressure inside the tire = 48.6959 psi  

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