Question

What is the wavelength of a 285-Hz sound wave when the speed of sound is 375 m/s?A. 1.2 mB. 1.32 mC. 106.875 kmD 0.76 m

Answer 1

ANSWER

$B.\text{ }1.32\text{ }m$

EXPLANATION

The speed of a wave is given by the formula:

$v=\lambda *f$

where λ = wavelength

f = frequency

Hence, the wavelength of the wave is:

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

Therefore, the wavelength of the sound wave is:

$\begin{gathered} \lambda=\frac{375}{285} \\ \lambda=1.32\text{ }m \end{gathered}$

The answer is option B.