Question

The distance from the first to the fifth peak of a wave with a frequency of `90` `Hz` is `12.0` `m`. What is the velocity of the wave?

Answer 1

4 wavelengths cover a distance of `12.0` `m`, so the wavelength is `12/4=3` `m`. To find the velocity, `v=flambda=90xx3=270` `ms^-1`.

Explanation:

The distance from the 1st to the 5th peak is 4 wavelengths.