An air-filled, hemispherical shell is attached to the ocean floor at a depth of 9.1 m as shown in the figure below. A mercury barometer located inside the shell reads 765 mm Hg, and a mercury U-tube manometer designed to give the outside water pressure indicates a differential reading of 735 mm Hg as illustrated. Based on these data what is the atmospheric pressure at the ocean surface? Patm = kPa 735 mm Ocean surface Seawater 360 mm Mercury Shell- Shell wall L 9.1m

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