Question

In o.4meters there are 20waves and an observer's ear perceives 120waves in a minute find frequency,wavelength and the speed o the wave​

Answer 1

Answer:

20 waves in 0.4m

so 1 wave in 0.4/20=2cm is the wavelength

120 waves in 60 seconds

so 2 waves in one second will be the frequency.

velocity=wavelength×frequency=0.04m/s.

hope it helps

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