Question

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?

Answer 1

For question one the speed is238

Answer 2

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