Question

A fire whistle emits a tone of 170Hz. Take the speed of sound in air to be 340m/s. The wavelength of the
sound is about.

Answer 1

The wavelength of this sound is about 2 m.

Explanation:

Frequency of the whistle, f = 170 Hz

The speed of sound in air, v = 340 m/s

Let

\lambda

is the wavelength of this sound wave. It is given by :

$v=f\times \lambda$

$\lambda=\dfrac{v}{f}$

$\lambda=\dfrac{340\ m/s}{170\ Hz}</p><p>\lambda=2\ m$

So, the wavelength of this sound is about 2 m. Hence, this is the required solution.

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Speed of sound wave