A sealed, highly flexible silicone storage pouch containing a small volume of air is attached to the exterior of a deep-sea research submersible.
The submersible descends from the surface of the ocean down to the sea floor at a depth of 4000 m.
Explain what happens to the volume of the air inside the pouch as the submersible descends.
54 exam-style questions on Edexcel GCSE Physics 15.2 Pressure in fluids, covering 15.2.1 Atmospheric pressure and height, 15.2.2 Pressure in fluids, 15.2.3 Pressure, force and area, 15.2.4 Pressure and depth, 15.2.5 Pressure in liquids: depth and density, 15.2.6 Upthrust, and 15.2.7 Floating and sinking. Each one has a worked solution and a mark scheme showing where the marks go.