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?

Answer 1

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.

Answer 2

Answer:

The answer is B. 3 times