A sound of frequency 512 Hz reaches a listener 100 m away. If the sound
PHYSICS
WAEC 2023
A sound of frequency 512 Hz reaches a listener 100 m away. If the sound travels in air at s.t.p., what is its wavelength?
[speed of sound in air = 331 m/s]
- A. 1.550m
- B. 0,646m
- C. 5.120m
- D. 0.195m
Correct Answer: B. 0,646m
Explanation
f = 512Hz, V = 331m/sλ = ?
V = fλ
λ = \(\frac{v}{f} = \frac{331}{512}\)
λ = 0.646m.
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