A submarine has been damaged from an explosion at the depth of 250 m
below the surface. A man tries to escape from the submarine by using a pop-
out hatch, which is 1.8 m by 0.9 m in size. Determine the value of the force
needed for the man to push out at 250 m depth below the surface.
(Density of sea water = 1024 kg/m3, internal air pressure = 1.00 atm)
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