Question

The frequency of a fork is $500$Hz. Velocity of sound in air is $350$ $m{s}^{-1}$. The distance through which sound travel by the time the fork makes $125$ vibrations is?

• A. $87.5$m
• B. $700$m
• C. $1400$m
• D. $1.75$m

Answer 1

The correct option is A $87.5$m

$wavelength=\frac{velocity}{frequency}$

$=\frac{350}{500}=\frac{7}{10}$

Distance traveled in $125$ vibrations

$=$wavelength$\times$ no of vibrations

$=\frac{7}{10}\times 125$

$=87.15m$