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What is the range of air pressure in the tank when the gauge reads 210 psi?

A. 0 to 210 psi
B. 100 to 210 psi
C. -210 to 0 psi
D. 210 to 420 psi

Answer :

Final answer:

The range of air pressure in the tank with a gauge reading of 210 psi is from 0 to 210 psi, which represents the gauge pressure above atmospheric level.

Explanation:

The question revolves around the concept of gauge pressure as compared to absolute pressure. Most pressure gauges are calibrated to read zero at atmospheric pressure, meaning they display the pressure above the atmospheric pressure. Given that a pressure gauge on a tank reads 210 psi, this indicates the gauge pressure, or the pressure above atmospheric pressure, inside the tank. The range of air pressure in the tank when the gauge reads 210 psi would therefore span from atmospheric pressure (which the gauge reads as zero) to an additional 210 psi. So, the correct answer is a) 0 to 210 psi.

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