The table shows four pressure sensors in open tanks. Atmospheric pressure is the same above all the tanks.
| Sensor | Liquid | Depth below surface in cm\mathrm{cm}cm |
|---|---|---|
| P | Water | 10 |
| Q | Water | 30 |
| R | Salt solution | 10 |
| S | Salt solution | 30 |
The salt solution is denser than water. Which sensor records the greatest pressure?
Sensor P
Sensor Q
Sensor S
Sensor R
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.