WAEC Physics 2021 Objective — Question 48
Question 48 of 50 from the West African Examinations Council (WAEC) Physics 2021 Objective paper, with the correct answer and a full explanation.
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48. If the relative humidity of the atmosphere increases, the rate of evaporation of sweat from the human body
- A. decreasesCorrect
- B. increases
- C. remains constant
- D. increases and then decreases
Explanation
Higher relative humidity means the air already holds more moisture, so it absorbs sweat vapour more slowly — the evaporation rate decreases.
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