A sound signal of 128 vibrations per second has a wavelength of 2.7 m. Calculate the speed with which the wave travels.

Academic Physics NCERT Class 9

As given, A sound signal of 128 vibrations per second.

So the frequency of the sound signal $f=128\ Hz$

Wavelength $\lambda=2.7\ m$

Therefore, speed of the sound $=frequency(f)\times wavelength(\lambda)$

$=128\ Hz\times2.7\ m$

$=345.6\ m/s$

Therefore, speed of the sound is $345.6\ m/s$.

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Updated on: 10-Oct-2022

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