okay so the 'above relationships' are wave speed = frequency x wavelength and frequency = 1 / time period
We just need to be able to substitute what we are given in questions into the equation. Here are some examples...
1- Find the speed of a wave of wavelength 12m and frequency 4Hz
To answer this, we use the equation wave speed = frequency x wavelength, so, 12 x 4 = 48. Therefore, the wave speed of this wave is 48 seconds. (NOTE: fyi, this is a really unrealistic wave speed, this is just an example of how to sub in the equation!)
2- A wave has a period of 0.35 seconds. Find the frequency of this wave.
For this question, we need to use the equation frequency = 1 / time period. We know the period is 0.35, so all we need to do is 1 / 0.35 = 2.857 which rounds to 2.86. so the frequency of this wave is 2.86Hz
No comments:
Post a Comment