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**1. Homework Statement**

THe human lungs can operate w a pressure differential of abt 1/20 of an atmosphere. If a diver uses a snorkle for breathing, about how far below the water level can they swim?

**2. Homework Equations**

P=P(i) + pgh

where p is ro, density.

**3. The Attempt at a Solution**

1026kPa=101.3kPa + (0.001g/l)(9.8m/s^2)(h)

I isolated for h, but the number i get is way larger than the diameter of earth.

My problem is this: the units don't seemt o cancel out properly. the units for height work out to be L/m^2