Question

What is the speed of a wave with a wavelength of 420m and a frequency of 0.40 Hz?

Answer 1

The speed of a wave is related to its frequency and its wavelength by

`v=f \lambda`
where f is the frequency and
`\lambda` the wavelength. In our problem,
`f=0.40 Hz` and
`\lambda=420 m`, therefore the speed of the wave is:

`v=f \lambda=(0.40 Hz)(420 m)=168 m/s`