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Equal volumes of hot water are added to two cans - Edexcel - GCSE Physics - Question 7 - 2019 - Paper 1
Question 7
Equal volumes of hot water are added to two cans. The cans are identical apart from their surfaces. One can has a black surface and the other can has a silver surf... show full transcript
Worked Solution & Example Answer:Equal volumes of hot water are added to two cans - Edexcel - GCSE Physics - Question 7 - 2019 - Paper 1
Step 1
Explain, using evidence from the graph, which curve is for the black can and which curve is for the silver can.
Answer
The graph shows the temperature of the two cans over time, with curve P representing the black can and curve Q representing the silver can.
- From the graph, we can observe that curve P starts at a higher temperature and takes longer to cool down compared to curve Q.
- This indicates that the black can, which has a matte black surface, absorbs more heat and retains it longer than the shiny silver can.
- The silver surface, represented by curve Q, reflects more heat and thus cools down more quickly.
- Therefore, based on the cooling rates, we conclude that the black can corresponds to curve P and the silver can corresponds to curve Q.