7 hertz. Since frequency of the wave motion is defined as the number of waves ie number of wavelengths crossing a particular point in the medium in one second.
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The wave's frequency is.
Frequency is measured in Hertz (Hz), which is the number of wavelengths that pass in one second. Since one wavelength is passing every eight seconds, the frequency is 1/8 Hz.
Frequency
The frequency is 6 per 2 seconds = 3 Hz. The period is the reciprocal of the frequency = 1/3 second.
2 Hz is.