What is the wavelength of an earthquake wave if it has a speed of 13 km/s and a frequency of 2 hz?

Generally, the definition of the speed is the distance per the time unit

Then, for one complete wave, the wave moves a distance equal to the wavelength (λ) in time equal to the period (T)

λ/T

but we now that the frequency (f) is equal to the reverse of the period (T)

Then the speed of the wave is determined by

λ f

in our problem, we need to find the wavelength

note that: the speed must be in m/s not km/s , that you need to convert km to m by multiplyling by 1000

λ =

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