Question

The frequency of a sound wave is 457 Hz. What is the period?
a
0.0032 s
b 0.078 s
C 0.0010 s
d 0.0022 s

Answer 1

Period: 1/Frequency
1/457 = 0.002188 seconds
Round it to 0.0022 seconds

The answer is D

Answer 2

The period of the sound wave having frequency of 457Hz is 0.0022 s.

What is frequency?

The frequency refers to the number of waves that pass a fixed point in unit time.

What is the relation between frequency and time period?

Time period is equal to the reciprocal of frequency.

                           i.e. T = 1 / f

So, The period of the sound wave having frequency of 457Hz will be

                                T = 1/457

                            ∴ T = 0.002188 s

Now , rounding to the nearest value we get , 0.0022 s

Thus , The period of the sound wave having frequency of 457Hz is 0.0022 s.

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