WAEC Physics 2015 Objective — Question 16
Question 16 of 50 from the West African Examinations Council (WAEC) Physics 2015 Objective paper, with the correct answer and a full explanation.
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The crackling noise produced by aluminium roofing sheets on a house during a hot sunny day is as a result of
- A. thermal equilibrium of the sheets
- B. conduction of heat by the sheets
- C. contraction of the sheets
- D. expansion of the sheetsCorrect
Explanation
The heat from the sun causes the aluminium sheets to expand, and this expansion produces the crackling noise.
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