A sound source sends waves of 400 Hz. It produces waves of wavelength 2.5 m. The velocity
c) 3 ms-1, 2:4 d) 4 ms-1, 1:2
of sound waves
a) 100 ms-1
b) 1000 ms-1
c) 10000 ms-1 d) 3000 km
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Answer: b
Explanation: Wavelength=2.5m
Frequency=400 Hertz
Distance=2.5 m
Using formula
Velocity=V =frequency x wavelength
V=400*2.5
V=1000 m/s
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