A vertical cylindrical settling tank is filled with a concentrated salt solution. A drain valve at the very base of the tank is opened, allowing the solution to flow out slowly.
Explain how the pressure exerted by the salt solution on the base of the tank changes as the solution drains.
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.