A student wraps a beaker of hot water in 2 layers of newspaper and measures the time taken for the water to cool by 15 °C. She repeats the test with 6 layers of newspaper, using the same volume of water at the same starting temperature. Which statement about the test with 6 layers is correct?
Newspaper is a good thermal conductor, so the extra layers make the water cool by 15 °C in less time.
The extra layers slow down the transfer of cold into the water, so it takes longer to cool by 15 °C.
The extra layers reduce the rate of energy transfer from the water, so it takes longer to cool by 15 °C.
The starting temperature is the same, so the water takes the same time to cool by 15 °C.
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.