Question

Sound travel a distance 80m in 40 vibrations of tunning fork what is its wavelength

Answer 1

Wavelength of 40 vibrations = 80

Wavelength of 1 vibration = 80/40

Wavelength of one vibration = 2

Explanation:

40 vib = 80

1 vib = 80/40

1 vib = 2

Answer 2

The wavelength of the sound wave produced by 40 vibrations of the tuning fork is 2m

Given:

Distance of sound wave = 80m

No of vibrations = 40

To Find:

The wavelength of the Sound waves produced by the tuning fork of 40 vibrations

Solution:

We know that,

Velocity = Distance/Time

v = 80 / t...................(1)

Frequency = Vibrations/Time

f = 40 / t....................(2)

Also,

Frequency = Velocity/Time

That is,

f = v/λ

λ = v/f

On substituting the values of v and f from (1) and (2) we get,

λ = (80/t)/(40/t)

λ = 80 / 40

λ = 2m

Therefore, the wavelength of the sound wave that traveled a distance of 80m and producing 40 vibrations is 2m

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