What is the formula for calculating absolute pressure at sea level?

What is the formula for calculating absolute pressure at sea level?

• A. Gauge pressure + 14.7 PSI
• B. Gauge pressure - 14.7 PSI
• C. Absolute pressure - 14.7 PSI
• D. Relative pressure + 14.7 PSI

Answer: (A)

The formula for calculating absolute pressure at sea level involves adding the gauge pressure to the standard atmospheric pressure, which at sea level is approximately 14.7 PSI. Gauge pressure measures the pressure relative to atmospheric pressure, meaning it does not include the ambient air pressure exerted by the atmosphere itself. When calculating absolute pressure, it is essential to account for this atmospheric pressure. Thus, the correct calculation is obtained by adding the gauge pressure (the pressure reading from a gauge that does not account for atmospheric pressure) to the atmospheric pressure (14.7 PSI at sea level). This ensures that the final value reflects the total pressure exerted on a surface, combining both the gauge pressure and the atmospheric pressure acting on it. Therefore, the correct choice clearly articulates the necessary relationship between gauge pressure and the absolute pressure at sea level.

The formula for calculating absolute pressure at sea level involves adding the gauge pressure to the standard atmospheric pressure, which at sea level is approximately 14.7 PSI.

Gauge pressure measures the pressure relative to atmospheric pressure, meaning it does not include the ambient air pressure exerted by the atmosphere itself. When calculating absolute pressure, it is essential to account for this atmospheric pressure. Thus, the correct calculation is obtained by adding the gauge pressure (the pressure reading from a gauge that does not account for atmospheric pressure) to the atmospheric pressure (14.7 PSI at sea level).

This ensures that the final value reflects the total pressure exerted on a surface, combining both the gauge pressure and the atmospheric pressure acting on it. Therefore, the correct choice clearly articulates the necessary relationship between gauge pressure and the absolute pressure at sea level.