Question

Describe an activity to show that sound is produced by vibration of materials.

Answer 1

Hint: Sound is a vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid or solid. In human physiology and psychology. A fork consists of two tines and a handle. When it is hit with a rubber hammer, the two tines start vibrating. The back and forth motion of tines produces.

Complete step-by-step answer:
Let's demonstrate 3 activities which can show that sound is produced by vibration of materials.
1st activity:
You can strike a tuning fork on a cork plate, and touch lightly the surface. You can feel the vibrations on the surface. The frequency of vibrations will be indicated by the number on the side of the tuning fork.

2nd activity:
You can use the metallic bells used in festivals or in the temples or in our homes for pujas. You can strike it with another metal and again touch the sides. Faint vibrations can be felt.

3rd activity:
You can touch the front of the amplifier speakers while music is being played. Strong vibrations can be felt on the surface. These activities can show that molecular vibrations cause sound.

Note:
From a molecular point of view usually sound is produced by the vibration of the surface electrons which will tend to generate a pressure wave in the surrounding medium leading to propagation of the sound.