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9 July, 16:19

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.

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Answers (2)
  1. 9 July, 16:40
    0
    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.
  2. 9 July, 16:43
    0
    B is the answer

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