Question

A sound wave having a wavelength of 2 cm is travelling in water. If the velocity of sound in water is 1600 m/s. Find the frequency of the sound wave.

• A. 9000 Hz
• B. 8000 Hz
• C. 7000 Hz
• D. 1600 Hz

Answer 1

The correct option is B 8000 Hz

Speed of a wave is given by:
$v=f\lambda$
where:
$f:$ Frequency
$\lambda :$ Wavelength

$1600=f\times 0.02$
$f=8000Hz$