JAMB Physics 2018 Objective — Question 23
Question 23 of 38 from the Joint Admissions and Matriculation Board (JAMB) Physics 2018 Objective paper, with the correct answer and a full explanation.
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A herdsman yelling out to fellow herdsmen heard his voice reflected by a cliff 4s later. What is the velocity of sound in air if the cliff is 680m away?
- A. 170ms⁻¹
- B. 136ms⁻¹
- C. 340ms⁻¹Correct
- D. 680ms⁻¹
Explanation
Sound travels to the cliff and back (2×680=1360m) in 4s. Velocity = 1360/4 = 340ms⁻¹.
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