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QuestionPhysics

125 psig is equivalent to A. 14.696 psia. B. 135 psia. C. 139.7 psia. D. 147.7 psia.
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Answer

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Step 1:
I'll solve this problem step by step using the specified LaTeX formatting guidelines:

Step 2:
: Understand the Given Information

- We are given a pressure of 125 psig (pounds per square inch gauge) - We need to convert this to absolute pressure (psia)

Step 3:
: Recall the Conversion Formula

P_{absolute} = P_{gauge} + P_{atmospheric}
The conversion from gauge pressure (psig) to absolute pressure (psia) is:

Step 4:
: Identify Atmospheric Pressure

P_{atmospheric} = 14.696 \text{ psia}
Standard atmospheric pressure is typically:

Step 5:
: Calculate Absolute Pressure

P_{absolute} = 125 \text{ psig} + 14.696 \text{ psia}
P_{absolute} = 139.7 \text{ psia}

Step 6:
: Compare with Given Options

Checking the options, we see that 139.7 psia matches option C.

Final Answer

Key Insights: - Gauge pressure measures pressure relative to atmospheric pressure - Absolute pressure includes the standard atmospheric pressure - Always add atmospheric pressure (14.696 psia) to gauge pressure to get absolute pressure