Post-UTME Physics 2008 Objective — Question 6
Question 6 of 10 from the Post-UTME Screening (Post-UTME) Physics 2008 Objective paper, with the correct answer and a full explanation.
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A man hears his echo from a nearby wall some seconds after he shouted. If the frequency of his voice is 260Hz and the wavelength is 1.20m, how far away is the wall?
- A. 312mCorrect
- B. 315m
- C. 335m
- D. 340m
Explanation
Speed of sound = frequency x wavelength = 260 x 1.20 = 312 m/s (matching option A, with the exact distance depending on the echo time given in the original).
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