Question

The musical note A is a sound wave. The note has a frequency of 440 Hz and a wavelength of 0.784 m. Calculate the speed of the musical note in m/s.

• A. 343
• B. 345
• C. 34
• D. 346

Answer 1

Answer: (B)

345

Let,

The frequency of the musical note is $\nu =440Hz=440s^{-1}$

The wavelength of the musical note is $\lambda =0.784m$

Now, the frequency of the musical note is

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

where, $v$ is the speed of the musical note

Hence, the speed of the musical note is

$v=\nu \lambda$

$v=440\times 0.784$

$v=344.96\approx 345m{s}^{-1}$