WAEC Physics 2016 Objective — Question 18
Question 18 of 50 from the West African Examinations Council (WAEC) Physics 2016 Objective paper, with the correct answer and a full explanation.
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18. The diagram above is used to determine the A. boiling point of water B. atmospheric pressure C. upper fixed point of a thermometer D. amount of water in the atmosphere
- A. boiling point of water
- B. atmospheric pressure
- C. upper fixed point of a thermometerCorrect
- D. amount of water in the atmosphere
Explanation
The diagram is used to determine the upper fixed point (steam point) of the liquid. As the thermometer is suspended in the steam, the mercury thread rises until its level remains steady; this position is marked on the thermometer as the upper fixed point.
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