Sound waves cannot travel in a vacuum because a) there is no medium for the sound waves to travel through. b) sound waves move too slowly through space without pressure. c) sound waves move too quickly through space without pressure. d) vacuums contain too many air particles for sound waves to move.

A)there is no medium for the sound waves to travel through.

Explanation:

Sound is a mechanical wave. It requires medium to transfer energy. It moves forward by changing the pressure of the particles that form the medium i.e. by compression and rarefaction.

Now in vacuum, since there is no medium-it is empty, so the sound waves cannot travel and transfer energy. The correct option is A.

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which piece of furniture will have the most inertia and give the furniture movers the most difficulty in moving?  

answer

a 75kg dining table