When a tuning fork vibrates,the waves produced in the fork are

Frequency range of the audible sounds is

When pressure on a gaseous medium is changed at constant temperature,what will be the effect on the speed of sound wave in it?

When an aeroplane attains a speed higher than the velocity of sound in air,a loud bang is heard. This is because

$A$ $SONAR$ (sound navigation and ranging) uses ultrasonic waves to detect and locate objects under water. In a submarine equipped with a $SONAR$,the time delay between generation of a probe wave and the reception of its echo after reflection from an enemy submarine is found to be $77.0\; s$. What is the distance of the enemy submarine (in $; km$)? (Speed of sound in water $= 1450\; m/s$)

For a particular sound wave propagating in air, a path difference between two points is $0.54 \, m$ which is equivalent to a phase difference of $(1.8 \pi)$. If the velocity of the sound wave in air is $330 \, m/s$, the frequency of this wave is: (in $Hz$.)