(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?
The Attempt at a Solution
Thing is this is wrong and I have no idea why. Can someone enlighten me?