What is the pressure in psi required to lift water 20 feet?
A) 20 ft × 0.433 lb/ft = 8.66 psi
B) 14.7 psi—just enough to overcome atmospheric pressure
C) (20 ft × 0.433 lb/ft) 144 in2/ft2 = 0.06 psi
D) It is not possible to determine the pressure without knowing the cross sectional area of the pipe.
A
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