The frequency of a sound wave is $n$ and its velocity is $v$. If the frequency is increased to $4n$,the velocity of the wave will be

Find the wavelength of a sound wave of frequency $4.2 \text{ MHz}$ travelling with a speed of $1.7 \text{ km/s}$.

$A$ granite rod of $60 \ cm$ length is clamped at its middle point and is set into longitudinal vibrations. The density of granite is $2.7 \times 10^3 \ kg/m^3$ and its Young's modulus is $9.27 \times 10^{10} \ Pa$. What will be the fundamental frequency of the longitudinal vibrations in $kHz$?

$Assertion :$ Sound travels faster in solids than gases.
$Reason :$ Solids possess greater density than gases.

The frequency of a rod is $200 Hz$. If the velocity of sound in air is $340 m/s$,the wavelength of the sound produced is:

Write Newton's equation for the speed of a sound wave in air.