Question

Imagine a ringing bell set inside a sealed glass jar. Once all the air is removed and a vacuum is crated, the ringing sound is no longer heard. Explain why this happens.
A. The lack of air in the jar causes the ringing to stop.

B. Without air, the sound waves cannot travel to the ear.

C. The glass prevents any sound from scraping.

D. The pressure of outside air causes the sound to remain within the jar.

Answer 1

working...

Sound wave needs medium to travel

as energy which travels in this wave is because of transfer from one particle to another particle

If there is no medium then energy can not be transferred and sound wave will not travel

so in vacuum we can not listen sound

similarly here air is removed it means there is no medium inside the jar to travel the sound and hence we can not hear it

Option B is correct

Without air, the sound waves cannot travel to the ear.