Question

a sound signal of 128 vibrations per second has a wavelength of 2.7 m calculate the speed with which the wave travel

Answer 1

frequency = velocity / wave length
there fore , velocity ( speed ) = frequency x wave length
speed = 128 * 2.7 = 345.6

Answer 2

The speed with which the wave travel is 345.6 m/s.

Explanation:

In this case, a sound signal of 128 vibrations per second has a wavelength of 2.7 m.

The total number of vibration per second is called frequency of a wave. Here, sound signal gives 128 vibrations per second. It is the frequency of sound. Let v is the speed of the wave. The speed of a wave is given by :

$v=f\lambda\\\\v=128\times 2.7\\\\v=345.6\ m/s$

So, the speed with which the wave travel is 345.6 m/s.

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