Here's an interesting fact to remember: (Period of any wave) x (Frequency of the wave) = 1 .If you can memorize that, then you'll always remember that Period = 1 / frequencyand Frequency = 1 / period. The second one is what you need for this problem. Frequency = 1 / period = 1 / (4.85 x 10⁻² second) = 1 / (0.0485 second) =20.62 / second
=20.62 Hz. (rounded)
Explanation:(Plato) I just took the test
