A storage vessel contains liquid detergent of uniform density. Three pressure sensors are at different vertical depths below the surface.
The reading at P has been checked and is correct.
| Sensor | Depth below the surface in m | Pressure due to the liquid in kPa |
|---|---|---|
| P | 0.40 | 4.8 |
| Q | 0.95 | — |
| R | 1.60 | 16.8 |
A technician states that the reading at R is consistent with the pressure due to the liquid being directly proportional to depth.
Evaluate the technician's statement.
The sensing surface at Q has an area of 0.025 m2.
Calculate the force that the liquid exerts normal to the sensing surface at Q.
108 exam-style questions on AQA GCSE Physics 5.5 Pressure and pressure differences in fluids, covering 5.5.1 Pressure in a fluid and 5.5.2 Atmospheric pressure. Each one has a worked solution and a mark scheme showing where the marks go.