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An air bubble originating froman under water

diver has a radius of 5 mm at some depth h.

When the bubble reaches the surface of the

water, it has a radius of 7.4 mm.

Assuming the temperature of the air in the

bubble remains constant, determine the abso-

lute pressure at this depth h. The acceleration

of gravity is 9.8 m/s2 .

Answer in units of Pa.

## Homework Equations

what I need to know. Is this a PV=nRT question??

## The Attempt at a Solution

I dont need to know the answer to the question, just what equation to use to find the absolute pressure. there is a follow up question to determine the depth of the diver as well.