A deep-sea research submersible must be constructed with extremely thick, strong metal walls. Why is this design necessary for diving to great ocean depths?
The average density of seawater is significantly lower at great depths.
The hydrostatic pressure of the water increases with depth, which could crush the hull.
The temperature of the water is higher at great depths, requiring thermal protection.
The weight of the submersible increases significantly as it dives deeper.
188 exam-style questions on CIE IGCSE Physics Pressure, covering Pressure. Each one has a worked solution and a mark scheme showing where the marks go.