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(a) Calculate the absolute pressure at an ocean depth of 750 m. Assume the density of sea water is 1020 kg/m3 and that the air above exerts a pressure of 101.3 kPa.
Pa

(b) At this depth, what force must the frame around a circular submarine porthole having a diameter of 30.0 cm exert to counterbalance the force exerted by the water?

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