kenzico3oletl
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The period of the musical node E0 is 4.85 × 10-2 seconds. What is the frequency of this note?Select one of the options below as your answer:. A. 10.8 hertz. B. 20.6 hertz. C. 40.8 hertz. D. 48.5 hertz. E. 80.9 hertz

Verified Answer :

AL2006


Here's an interesting factoid 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 / frequency
and
                 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)

olemakpadu

Frequency, f = 1/T,   Period  T = 4.85 10 ⁻² s

f = 1/(4.85 10 ⁻²)

f ≈ 20.619 ≈ 20.6

The frequency is B. 20.6 Hertz

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