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