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 Homework Statement

A submarine is 100 m below the surface of the water, which has a density of 1000 kg/m^3. Compare the force of the water outside the submarine and the air inside (1.0 atm) on a .1 m x .2 m window.
Apply the relationship P= P0+rho*g*h and any other principles needed to determine the net force that the air inside and the water outside exert on the window.
 Homework Equations
 Apply the relationship P= P0+rho*g*h and any other principles needed to determine the net force that the air inside and the water outside exert on the window.
I have no idea, I honestly thought that the net force would be zero since the submarine window isn't moving...yikes