An underwater scientific habitat is anchored at a constant depth in a marine reserve. On the flat horizontal roof of the habitat, there is a small circular airlock hatch and a much larger rectangular equipment hatch. Both hatches are exposed to the same uniform hydrostatic pressure of the surrounding seawater.
Compare the magnitude of the force exerted by the seawater on the circular airlock hatch with the force exerted on the larger rectangular equipment hatch, explaining your reasoning.
54 exam-style questions on Edexcel GCSE Physics 15.2 Pressure in fluids (physics only). Each one has a worked solution and a mark scheme showing where the marks go.