A manufacturer is designing an insulating sleeve for a heated metal cylinder. Identical cylinders were tested with sleeves made from material K or material L. Each test lasted 15 minutes.
| Material | Sleeve thickness (mm) | Starting temperature (°C) | Final temperature (°C) |
|---|---|---|---|
| K | 10 | 80 | 62 |
| K | 20 | 80 | 68 |
| L | 10 | 80 | 72 |
| L | 20 | 80 | 75 |
An engineer claims that doubling the thickness of a sleeve is more effective at reducing cooling than changing the sleeve from material K to material L.
Evaluate the engineer's claim. Use all four results in your answer.
104 exam-style questions on AQA GCSE Physics 1.2 Conservation and dissipation of energy, covering 1.2.1 Energy transfers in a system and 1.2.2 Efficiency. Each one has a worked solution and a mark scheme showing where the marks go.