First slide

Experiments to find speed of sound

Question

A tuning fork is used to produce resonance in a glass tube. The length of the air column in this tube can be adjusted by a variable piston. At room temperature of $27^{0} C$ two successive resonances are produced at 20 cm and 73 cm of column length. If the frequency of the tuning fork is 320 Hz the velocity of sound in air at $27^{0} C$ is

Easy

A

$330 m s^{- 1}$
B

$339 m s^{- 1}$
C

$350 m s^{- 1}$
D

$300 m s^{- 1}$

Solution

The velocity of sound in air at $27^{0} C$ is
$v = 2 (n) [L_{2} - L_{1}]; where v =$ frequency of tuning fork and $L_{1}, L_{2}$ are the successive column length.
$∴ v = 2 \times 320 [73 - 20] \times 10^{- 2}$
$= 339.2 m s^{- 1} \approx 339 m s^{- 1}$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App