Sound

Hi there! Now in this thread I'm going to tell you about sound. What is sound ?
Sound is a type of energy made by vibrations. When any object vibrates, it causes movement in the air particles. These particles bump into the particles close to them, which makes them vibrate too causing them to bump into more air particles. This movement, called sound waves, keeps going until they run out of energy. If your ear is within range of the vibrations, you hear the sound.


How does sound travels ?


Sound travels away from the source in all directions and its loudness decreases with increasing distance from the source, they travel in different speeds in different media. Sound need a medium to travel.We cannot hear an alarm clock when it rings inside a jar with a vacuum, because there is no air or any other medium through which sound can travel.


Vacuum is a space which has no matter in it.

This is the sound that's going to our ear.