A diver swims to a depth of 3.2 m in a freshwater lake. What is the increase in the force pushing in on her eardrum, compared to what it was at the lake surface? The area of the eardrum is 0.60 cm2.

Answer 1

The increased pressure is
(water density)*g*depth

Multiply that by the eardrum ares (in square meters) to get the increase in force.