An instrument pod is held fully submerged and then released in each liquid. Its weight is 18 N in both tests. The upthrust on the pod is measured in each liquid.
| Liquid | Upthrust on the pod |
|---|---|
| Fresh water | 17 N |
| Salt solution | 19 N |
Predict what the pod does immediately after it is released in each liquid. Explain your predictions. State which liquid is denser and explain your answer.
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.