Question

Anyone please summarize this activity..​

Answer 1

Answer:

your answer is

Explanation:

The sound will be clear if there is air. If the jar is filled with vaccum hence there is no air the sound will not be heard.

Hence we can conclude that sound will be clear in presence of air and will not be heard in the absence of air.

HOPE IT IS HELPFUL....

Answer 2

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Sound needs a material medium for their propagation like solid, liquid or gas to travel because the molecules of solid, liquid and gases carry sound waves from one point to another. Sound cannot progress through the vacuum because the vacuum has no molecules which can vibrate and carry the sound waves.

See diagram in attachment.

$\large \purple{§BE \: BRAINLY§}$