Question

The frequency of fork is 512 Hz and the sound produced by it travels 42 metres as the tuning fork completes 64 vibrations. Find the velocity of sound :

• A. 336 m/sec
• B. 320 m/sec
• C. 340 m/sec
• D. 350 m/sec

Answer 1

The correct option is A 336 m/sec

The distance traveled for one vibration is equal to the wavelength. So $64\lambda =42$

$\therefore \lambda =\frac{42}{64}=0.656$

Velocity of sound $v=\lambda \nu =0.656\times 512=336m/s$