The absolute pressure 20 m beneath the ocean is 303 kPa. Atmospheric pressure above the ocean is 101 kPa. What gauge pressure (in kPa) would a diver measure at this 20 m depth?
Thanks
Just subtract.
To calculate the gauge pressure at a certain depth, we need to determine the difference between the absolute pressure at that depth and the atmospheric pressure. Gauge pressure is zero when the measuring point is at the same pressure as the surrounding atmosphere.
In this case, the absolute pressure at 20 m beneath the ocean is given as 303 kPa, and the atmospheric pressure at the surface is 101 kPa.
To find the gauge pressure, we subtract the atmospheric pressure from the absolute pressure:
Gauge pressure = Absolute pressure - Atmospheric pressure
Gauge pressure = 303 kPa - 101 kPa
Gauge pressure = 202 kPa
Therefore, a diver at a depth of 20 m beneath the ocean would measure a gauge pressure of 202 kPa.