What is the frequency of a wave that has a wavelength of 0.4 m and travels at a distance of 78 meters in 10 sec?

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Answer 1 · 2017-12-13T06:45:21

The frequency is #=19.5Hz#

The distance travelled is #d=78m#

The time is #t=10s#

The speed of the wave is #v=d/t=78/10=7.8ms^-1#

The wavelength is #lambda=0.4m#

The equation of the propagation of the wave is

#v=lambdaf#

The frequency is #f=v/lambda=7.8/0.4=19.5Hz#