Question: An electrical short cut off all power to a submersible diving vehicle when it is 30 m below the surface of the ocean the crew

An electrical short cut off all power to a submersible diving vehicle when it is 30 m below the surface of the ocean the crew must push out a hatch of area 0.75 m2 and weight 300 N on the bottom to escape. If the pressure inside is 1.0 atm, what downward force must the crew exert on the hatch to open it?

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