Question

complete this sentence : - sound is produced when some material body ​

Answer 1

Answer:

sounds is produced when some material body vibrate

Answer 2

Answer:

➡vibrates

Explanation:

When an object vibrates, it causes movement in surrounding air molecules. These molecules bump into the molecules close to them, causing them to vibrate as well. This makes them bump into more nearby air molecules. This “chain reaction” movement, called sound waves, keeps going until the molecules run out of energy.