There is a maximum depth at which a diver can breathe through a snorkel tube (Fi

Question

There is a maximum depth at which a diver can breathe through a snorkel tube (Figure 1) because as the depth increases, so does the pressure difference, tending to collapse the diver's lungs. Since the snorkel connects the air in the lungs to the atmosphere at the surface, the pressure inside the lungs is atmospheric pressure.

What is the external-internal pressure difference when the diver's lungs are at a depth of h = 6.4m (about 21ft )? Assume that the diver is in fresh water. (A scuba diver breathing from compressed air tanks can operate at greater depths than can a snorkeler, since the pressure of the air inside the scuba diver's lungs increases to match the external pressure of the water.)

Express your answer using two significant figures. Also please don't copy from previous questions, i fould a lot of those to be wrong. Thank you in advance!!

Explanation / Answer

Pressure inside the lungs:   1 atmosphere

Pressure outside, due to the depth in the water:

    p = 1 atm + ?gd = 1 atm + 1000 * 9.8 * 6.4 = 1 atm + 62720 Pascals

So the difference=> 1 atm + 59780Pa - 1 atm =     62720Pa

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