Post-UTME Physics 2017 Objective — Question 6
Question 6 of 20 from the Post-UTME Screening (Post-UTME) Physics 2017 Objective paper, with the correct answer and a full explanation.
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The frequency of a tuning fork is 400Hz and the velocity of sound in air is 320ms-1. How far does the sound travel when the fork executes 30 cycles?
- A. 15m
- B. 21m
- C. 24mCorrect
- D. 30m
Explanation
Time for 30 cycles = 30/400 = 0.075s. Distance = v x t = 320 x 0.075 = 24m.
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