Expand the term SONAR.

What is elastic wave?

What is the main difference between a mechanical wave and a nonmechanical wave?

Write two differences between a longitudinal and a transverse wave.

Draw the displacement-time graph for a wave created when a stone is thrown into a pond.

Define the amplitude of a wave. Show it graphically. What does the amplitude of a wave describe?

Show the wavelength of a wave with the help of a diagram.

What is the audible range? Name an animal which plays games by producing ultrasound.

How is a longitudinal wave represented graphically?