What is the pressure in atmospheres on the body of a diver if he is 21 ft below the surface when the atmospheric pressure at the surface is 0.94 atm?

Answer 1

The pressure of freshwater increases by 1 atm for each 34 ft of depth. The pressure of seawater increases by 1 atm for each 33 ft of depth. If surface pressure is 0.97 atm, simply add that pressure to the pressure of the water.

For seawater, you are exactly 1 atm below the surface... So:

1 atm + 0.97 atm = 1.97 atm

For freshwater, divide 33 by 34 to get the fraction of an atmosphere you're adding to your surface pressure:

33/34 * 1 = 0.97 atm

Then add that number to the surface pressure:

0.97 + 0.97 = 0.94 atm

Answer 2

[(21/33) + .94] = 1.58

Answer 3

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