Question

What is vacuum? Explain why sound cannot travel through vacuum?

Answer 1

A vacuum is a space that is free or void of any matter. It is a space that has nothing  completely. 

Sound is a wave energy. What this means, is that sound travels through the vibration of particles of matter or medium. Since a vacuum is void of any matter, sound cannot travel through it

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Answer 2

Answer:

Vacuum is a container in which no air is present.

Sound can't travel through it because there is no air in container and sound can't travel without air.

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