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What is the total pressure on a diver below the surface of the water?
Atmospheric pressure is 14.7 pounds per square in (psi) Underwater, the water exerts additional pressure. The total pressure on a diver underwater is the atmospheric pressure plus the water pressure. As the diver moves downward in the water, the water pressure increases by 14.7 psi for approximately every 33 ft of water. What would be the total pressure on a diver at 0, 33, 66 and 99 ft below the surface of the water. At what depth would the total pressure equal 73.5 psi. Explain how you got the answer.
1 Answer
- WhomeLv 79 years agoFavorite Answer
At the surface the pressure is just air pressure so 14.7
33 feet below the surface you have 14.7 psi of air pressure plus 14.7 psi of water pressure so 29.4 psi total
66 feet below the surface you have 14.7 psi of air pressure plus (2)14.7 = 29.4 psi of water pressure so 44.1 psi total
99 feet below the surface you have 14.7 psi of air pressure plus (3)14.7 = 44.1 psi of water pressure so 58.8 psi total
each foot of water adds 14.7 / 33 = 0.445 psi to the total pressure
so if the total pressure is 73.5 psi we subtract the air pressure and divide by the psi per foot.
the diver is (73.5 - 14.7) / 0.445 = 132 feet below the surface.
