Question

A 60 vibration per second wave travels 30 meters in one second. What is its frequency and wave speed?

Answer 1

frequency: 60 Hz, speed: 30 m/s

Step-by-step explanation:

- The frequency of the wave is equal to the number of complete vibrations per second. For the wave in the problem, we have 60 vibrations per second, so the frequency is

`f=(60 vibr.)/(1 s)=60 Hz`

- The speed of a wave is given by

`v=(d)/(t)`

where d is the distance travelled and t the time taken. The wave in this problem travels a distance of d=30 m in a time of t=1 s, so the speed of the wave is

`v=(30 m)/(1 s)=30 m/s`