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Chuck is playing in a small submarine in his swimming pool. He dives his submarine to the bottom of the pool in the shallow end. There the escape hatch of his submarine is horizontal and at a depth of 1 m below the surface of the water. Assuming that the air is at a pressure of 1 atmosphere at the surface of the water, what is the water pressure on the escape hatch 1 m below the surface of the water?

The air in the interior of the submarine is at 1 atmosphere pressure. Chuck tries to push the hatch open. Assume the hatch has a negligible mass and an area of 0.45 m2. How much force must Chuck apply to push the hatch open?

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