A company is testing insulating sleeves for a drinks container. Equal volumes of hot water at the same starting temperature are poured into identical containers. One container has no sleeve and the others are fitted with sleeves of different thickness, all made from the same material. The containers are left in the same room for 15 minutes.
| Thickness of sleeve in mm | Temperature decrease after 15 minutes in °C |
|---|---|
| 0 | 12 |
| 10 | 8 |
| 20 | 6 |
Use the data to describe how the thickness of the sleeve affects the temperature decrease. Explain this effect in terms of the rate of energy transfer, and predict the temperature decrease after 15 minutes for a 30 mm sleeve made from the same material.
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.