A sound wave has frequency of 2kHz and a wave lenght of 35cm
If an observer 1.4km away from the source .At what time interval
could the observer hear the sound ?
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Explanation:
Speed of wave = frequency x wavelength
speed =
time
distance
∴ time distance= 0.35×2000 = 700 m/s
time = 700
1400
= 2s
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