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3) On planet X, the absolute pressure at a depth of 2.00 m below the surface of a liquid nitrogen lake is 5.00x 105 N/m . At a depth 5.00 m below the surface, the absolute pressure is 8.00x 105 N/m . The density of liquid nitrogen is 808 kg/m3. (a) What is the magnitude of the acceleration due to gravity on planet X? (b) What is the atmospheric pressure on planet X