1. The problem statement, all variables and given/known data (a) Calculate the absolute pressure at an ocean depth of 500 m. Assume the density of sea water is 1024 kg/m3 and that the air above exerts a pressure of 101.3 kPa. --I got this one its 5118900 Pa or N/m (b) At this depth, what force must the frame around a circular submarine porthole having a diameter of 28.0 cm exert to counterbalance the force exerted by the water? 2. Relevant equations F=PA 3. The attempt at a solution F= (5118900)(pi*.28^2)=1.26e6 Thing is this is wrong and I have no idea why. Can someone enlighten me?