Find the gauge pressure (in psi) at the bottom of a freshwater swimming pool that is 15.5 ft deep.

Answer 1

I would first convert 15.5 feet to (0.304861 meter per foot x 15.5 feet)

or 4.7253455 meters.

Take the density of fresh water as 997.05 kilograms per cubic meter at 25°C.

(Density of sea or salt water has been given as 1025 kilograms per cubic meter.)

Gauge Pressure is pressure figured with the exclusion of atmospheric pressure and

equal to Density x Acceleration Due To Earth Gravity x Depth From Water Surface.

Then write Pressure as ρgh or (997.05 kg/m³)(9.80665 m/s²)(4.7253455 m) which

simplifies to 46203.10701 (kg•m²) per (m³•s²) or 46203.10701 Newtons Per Square Meter

or 46203.10701 Pascals.

This last converts to 6.70119412 Pounds Per Square Inch (psi).