Question

1. Explain how sound is produced by a tuning fork
2. What is transferred by a wave motion, matter or alergy? 'Support your answer by an example or
experiment
Describe briefly an experiment to prove that vibrating bodies produce sound Poin​

Answer 1

Answer:

1. Longitudinal Waves and Tuning Forks. Sound waves are produced by vibrating objects. ... When the tuning fork is hit with a rubber hammer, the tines begin to vibrate. The back and forth vibration of the tines produce disturbances of surrounding air molecules.

2. The following is the experiment:

When a stone is dropped in still water of a pond, the sound of a stone striking the water surface is heard, which is actually a disturbance produced in water at the point where the stone strikes it. The disturbance propagates radially outwards, in all directions in the form of circular waves on the water surface.

If a piece of cork is placed on the surface of water at a distance away from the point where the stone strikes it, it is observed that the cork does not move forward, but it vibrates up and down, the wave still moves ahead. It is because water particles begin to vibrate upwards and downwards at the same point where the stone strikes. These particles then transmit their energy to the adjacent particles causing them to revert to their mean positions. Hence, particles do not move but only transfer energy to other particles

3. Stretch a string by holding one end in mouth between the teeth and the other end in one hand. Pluck it by the other hand near the middle. It is noticed that the string starts vibrating and simultaneously a sound is heard. After some time when the dtring stops vibrating, no sound is heard.