Physics (AS & A Level) · May / June 2020 · Paper 13 · Question 5
Two liquid-in-glass thermometers in a well-mixed liquid are individually observed by 10 different students. All agree that one thermometer reads 21 °C and the other thermometer reads 23 °C. What is a possible explanation for the difference?
- AThe liquid is not all at the same temperature.
- BThe readings are not precise.
- CThere is a random error affecting the readings.
- DThere is a systematic error affecting the readings.
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Correct answer: D. There is a systematic error affecting the readings.
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