Two identical heated pipes were fitted with coverings of the same thickness. The pipes started at the same temperature and were left in the same surroundings for 12 minutes.
The temperature decrease of each pipe is shown in the table.
| Pipe covering | Temperature decrease in 12 minutes in °C |
|---|---|
| Material P, with pockets of trapped air | 6 |
| Material Q, with no pockets of trapped air | 11 |
Explain which material is the more effective thermal insulator. Use information from the table 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.