Post-UTME Physics 2019 Objective — Question 10
Question 10 of 20 from the Post-UTME Screening (Post-UTME) Physics 2019 Objective paper, with the correct answer and a full explanation.
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If the speed of sound in air is 384 ms-1, what is the wavelength of a note which is one octave higher than a note of 256 Hz?
- A. 0.19m
- B. 0.75mCorrect
- C. 1.45m
- D. 1.50m
Explanation
One octave higher than 256Hz is 512Hz. Wavelength = v/f = 384/512 = 0.75m.
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