Do you hear the sound when bell jar is completely evacuated ?

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Solution

No, we don't hear any sound when the bell jar is completely evacuated.
$Reason - ------ -$
Sound is a mechanical wave. A medium is required for its propagation. When the bell jar is evacuated, there is no medium. Hence, the sound can not propagate and we can not hear the sound.

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Do you hear the sound when bell jar is completely evacuated ?

No, we don't hear any sound when the bell jar is completely evacuated. Reason––––––––Sound is a mechanical wave. A medium is required for its propagation. When the bell jar is evacuated, there is no medium. Hence, the sound can not propagate and we can not hear the sound.

No, we don't hear any sound when the bell jar is completely evacuated.
$Reason - ------ -$
Sound is a mechanical wave. A medium is required for its propagation. When the bell jar is evacuated, there is no medium. Hence, the sound can not propagate and we can not hear the sound.