$A$ mechanical wave (sound wave) in a gas is:

Velocity of sound in air:
$I.$ Increases with temperature
$II.$ Decreases with temperature
$III.$ Increases with pressure
$IV.$ Is independent of pressure
$V.$ Is independent of temperature
Choose the correct answer.

$A$ plane wave of sound traveling in air is incident upon a plane surface of a liquid. The angle of incidence is $60^{\circ}.$ The speed of sound in air is $300 \, m/s$ and in the liquid it is $600 \, m/s.$ Assume Snell's law to be valid for sound waves.

The temperature at which the speed of sound in air becomes double of its value at $27^\circ C$ is ... $^\circ C$

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:

Newton assumed that sound propagation in a gas takes place under which condition?