Pressure due to the weight of fluid:
The density of seawater, ρseawater = 1.025 × 103 kg/m3
Pwater = (25.0)(1.025 × 103)(9.81) = 2.51 × 105 N/m2
The air pressure inside the submarine cancels out the outside atmospheric pressure.
The net pressure, Pnet = Pwater
A submarine is stranded on the bottom of the ocean with its hatch 25.0 m below the surface. Calculate the force needed to open the hatch from the inside, given it is circular and 0.450 m in diameter. Air pressure inside the submarine is 1.00 atm.
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