1. A wave has a wavelength of 14 mm and a frequency of 17 Hertz. What is its speed?

2. What is the wavelength of an earthquake wave if it has a speed of 5 km/s and a frequency of 11 Hz?

For question one the speed is238

1. The formula for calculating the wave speed is

wave speed = frequency x wavelength.

v=f * λ

In our case,

f=17 Hz

λ = 14mm=0.14m

The wave speed is: 17*0.14=6.8 m/s

2. The speed of the earthquake wave is:

ve = 5 km/s=5000 m/s

the frequency of the earthquake is:

f=11 Hz

the wavelength of the earthquake is:

λ=ve/f

λ=5000 m/s / 11

λ=454.54 m