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5 (a) Which statement describes conservation of energy in a closed system? A when there are energy transfers, the total energy reduces B when there are energy transfers, the total energy does not change C when there are no energy transfers, the total energy reduces D when there are no energy transfers, the total energy increases (b) A student uses the apparatus in Figure 9 to find out which of two materials, sand or sawdust, is the better insulator - Edexcel - GCSE Physics Combined Science - Question 5 - 2022 - Paper 1
Question 5
5 (a) Which statement describes conservation of energy in a closed system? A when there are energy transfers, the total energy reduces B when there are energy tran... show full transcript
Worked Solution & Example Answer:5 (a) Which statement describes conservation of energy in a closed system? A when there are energy transfers, the total energy reduces B when there are energy transfers, the total energy does not change C when there are no energy transfers, the total energy reduces D when there are no energy transfers, the total energy increases (b) A student uses the apparatus in Figure 9 to find out which of two materials, sand or sawdust, is the better insulator - Edexcel - GCSE Physics Combined Science - Question 5 - 2022 - Paper 1
Step 1
Which statement describes conservation of energy in a closed system?
Answer
The correct choice is B: when there are energy transfers, the total energy does not change. This statement aligns with the principle of conservation of energy, which asserts that energy cannot be created or destroyed, only transformed from one form to another.
Step 2
Draw a labelled diagram to show how the student should set up the equipment to investigate which material is the better insulator.
Answer
To set up the investigation:
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Kettle: Place the kettle filled with water to heat the water for the experiment.
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Thermometer: Insert a thermometer into the large copper can filled with either sand or sawdust to measure the temperature changes.
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Copper Cans: Use the large copper can for insulation testing. Fill it partially with sand or sawdust, and seal the top.
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Stop Clock: Use a stop clock to measure the time interval for temperature change.
Make sure to label each component in the diagram clearly to show how they connect and interact within the setup.