Question

A wave is traveling at 36 m/s. If its wavelength is 12 m, how many times does a wavelength move across a set point every second?

a.)one time
b.)three times
c.)twelve times
d.)thirty-six times

Answer 1

Answer: The correct answer is b.)three times

Explanation:

To find the answer, simply divide the speed of the wave (32 m/s) by the wavelength (12 m).

36 / 12 = 3 times every second

Answer 2

Basically, what is asked here is the frequency in per second. This could be calculated by dimensional analysis, such that the remaining unit is 1/s.


`36 m/s\ / \ 12 m = 3\ s^(-1)`

Thus, the answer is three times. Letter B.

I hope I was able to give a good explanation. Thank you.