Post-UTME Physics 2015 Objective — Question 6
Question 6 of 20 from the Post-UTME Screening (Post-UTME) Physics 2015 Objective paper, with the correct answer and a full explanation.
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Two turning forks have frequencies of 150 Hz and 200 Hz. Calculate the difference in the wavelength of the notes they emit. [speed of sound in air = 330 m/s]
- A. 0.55mCorrect
- B. 7.25m
- C. 0.15m
- D. 6.60m
Explanation
Wavelength1 = 330/150 = 2.2m. Wavelength2 = 330/200 = 1.65m. Difference = 2.2-1.65 = 0.55m.
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