Answer :
Final answer:
A pressure gauge measures pressure above atmospheric pressure, known as gauge pressure. For instance, if the gauge reads 34 psi, the absolute pressure is 48.7 psi, because standard atmospheric pressure is 14.7 psi. The given values in the question represent the pressure difference above atmospheric pressure.
Explanation:
The student's question does not provide enough context to definitively answer what the reading on the pressure gauge would be. Pressure gauges like those used on scuba tanks or in a physics lab are calibrated to read zero at atmospheric pressure. This is known as the gauge pressure, and it provides a relative measure of pressure above atmospheric pressure.
For example, if a gauge reads 34 psi, the absolute pressure would be 34 psi + atmospheric pressure. Given that standard atmospheric pressure is usually around 14.7 psi, the absolute pressure in this instance would amount to about 48.7 psi.
So, if in your question the given values (300psi, 320psi, 330psi, 350psi) denote a reading on a pressure gauge, they represent the pressure difference above the atmospheric pressure, and not the absolute pressure. However, without a clear context or a specific problem to solve, we can't say exactly which of these values would be the correct reading in terms of the pressure gauge.
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