Question

The period of the musical node E0 is 4.85 × 10-2 seconds. What is the frequency of this note?

Answer 1

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