Problem: 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. 2. Relevant equations what I need to know. Is this a PV=nRT question?? 3. 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.