WAEC Physics 2016 Objective — Question 20
Question 20 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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20. A mercury-in-glass thermometer reads 4 cm at ice point and 29 cm at steam point. Calculate the temperature when the mercury level is at 9 cm. A. 13°C B. 20°C C. 33°C D. 38°C
- A. 13°C
- B. 20°CCorrect
- C. 33°C
- D. 38°C
Explanation
By interpolation: X/100 = (9-4)/(29-4) = 5/25 → X = (5/25)×100 = 20°C.
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