Question

If the frequency of a sound wave is 250 hertz and it's wavelength is 1.36 m, what is the waves velocity? A) 250 m/s B) 340 m/s C) 200 m/s D) 120 m/s

Answer 1

the equation for velocity is m/s therefore the simple equations brings the answer to be v=340 or B.

Answer 2

Answer: The correct answer is 340 m/s.

Explanation:

The expression for the velocity of the wave is as follows;

$v=f\lambda$

Here, f is the frequency of the wave, v is the velocity of the wave and $\lambda$ is the wavelength of the wave.

It is given in the problem that the frequency of a sound wave is 250 hertz and it's wavelength is 1.36 m.

Calculate the velocity of the wave.

Put $\lambda= 1.36 m$ and f= 250 Hz in the above expression.

$v=(250)(1.36)$

$v=340 m/s$

Therefore, the velocity of the wave is 340 m/s. The correct option is (B).