contestada

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?

Respuesta :

Jaymes1
For question one the speed is238
Ver imagen Jaymes1
LearnGrow
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