(a) Calculate the absolute pressure at the bottom of a fresh-water lake at a depth of 31.2 m. Assume the density of the water is 1.00 103 kg/m3 and the air above is at a pressure of 101.3 kPa.
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(b) What force is exerted by the water on the window of an underwater vehicle at this depth if the window is circular and has a diameter of 33.1 cm?
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