A warning system is being set up in a flooded underground chamber. Its first sensor, S, is placed in stationary water. The system activates only when the pressure due to the water at its second sensor is greater than the pressure at S.
Where should the second sensor be placed to make the system activate?
At a point above S.
At a point deeper than S.
At a point at the same depth as S.
At any point in the stationary water.
132 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.