Question

What is the wavelength of an earthquake wave if it has a speed of 15 km/s and a frequency of 12 Hz?

Answer 1

Answer: 1.25 km

Explanation:

The velocity $V$ of a wave is given by:

$V=\lambda.f$   (1)

Where:

$\lambda$  is the wavelength of the wave

$f$ is the frequency of the wave. Its unit is Hertz ($1Hz=\frac{1}{s}$)

So, we have to find $\lambda$  from equation (1):

$\lambda=\frac{V}{f}$   (2)

$\lambda=\frac{15km/s}{12Hz}$

Finally we obtain the wavelength of the earthquake wave:

$\lambda=1.25 km$