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The distance between a speaker and a listener is 8.0 m. Determine the frequency of the sound wave if exactly 20 waves are formed before sound reaches the listener. (Speed of sound in air is 340 m/s.)

Respuesta :

The frequency of the wave is 6800 Hz

Explanation:

Given:

Wave number, n = 20

Speed of light, v = 340 m/s

Frequency, f = ?

we know:

wave number = [tex]\frac{frequency}{speed of light}[/tex]

[tex]20 = \frac{f}{340 m/s} \\\\f = 20 X 340 s^-^1\\\\f = 6800 Hz[/tex]

Therefore, the frequency of the wave is 6800 Hz

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