Question

If velocity of sound in a gas is 360 m/s and the distance between a compression and the nearest rarefaction is 2 m, then the frequency of sound is ____________.

Options

• 90 Hz

• 180 Hz

• 360 Hz

• 720 Hz

Answer 1

If velocity of sound in a gas is 360 m/s and the distance between a compression and the nearest rarefaction is 2 m, then the frequency of sound is 90 Hz.

Explanation:

Distance between a compression and the nearest rarefaction is ${\displaystyle \frac{\lambda }{2}=2 \text{m.}}$

${\displaystyle \text{Hence n}=\frac{\text{v}}{\lambda }=\frac{360}{4}}$

${\displaystyle =90 \text{Hz}}$