What is a longitudinal wave?

What is the audible range of frequency?

What is the minimum distance needed for an echo?

What will be the frequency sound having 0.20 m as its wavelength, when it travels with a speed of 331 m s^–1?

Name three animals, which can hear ultrasonic vibrations.

If the amplitude of a wave is doubled, what will be the loudness?

How can we measure the depth of a sea by using "SONAR"?

Why longitudinal waves are called pressure waves?

What does cause the rolling sound of thunder?

What is the difference between wave velocity and particle velocity?