Question

Find the gauge pressure (in psi) at the bottom of a freshwater swimming pool that is 12.7 ft deep.

Answer 1

hydro-static pressure (in psi)

$$p= \rho h$$

where

$$p - pressure (psi); \rho - density (lb/in^3); h - deep (in)$$

we have

$$\rho=0.036127 (lb/in^3); h=152.4 (inches)$$

Calculating

$$p=0.036127\cdot 152.4=5.5 (psi)$$

Answer: pressure in this deep

$$p=5.5 (psi)$$