A rainwater barrel has a pressure sensor fixed near its base.
The table shows the pressure caused by the water for different vertical heights of water above the sensor.
| Vertical height of water above the sensor in m | Pressure caused by the water in Pa |
|---|---|
| 0.20 | 1960 |
| 0.40 | 3920 |
| 0.60 | 5880 |
Describe the relationship shown by the results.
The sensor remains fixed and more rainwater is added to the barrel.
Explain, using the relationship you identified in part (a), why the sensor reading changes.
The water is replaced by another liquid filled to the same vertical height above the sensor.
Give one property the replacement liquid must have for the sensor reading to be greater.
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.