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The speed of sound in vacuum is zero. Sound needs a material medium in order to

propagate. Since vacuum contains no material medium, sound does not propagate.

Therefore, it never moves from the source of the sound, and the

Speed = (distance covered in any time interval) divided by (time to cover the distance)

is zero.

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12y ago
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12y ago

Sound can not propagate in a vacuum. Sound waves, unlike light, are essentially compression waves and the sound in order to move from one place to other needs molecules to compress and decompress against, hence the wave is transmitted. In a vacuum, there are no molecules. Hence no sound and no speed of sound in a vacuum. The sound in "Star Wars" the movie is still fun.

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12y ago

it doesnt. It can not. It requires a medium, air for instance.

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14y ago

Sound will not travel in a vacuum, so zero.

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15y ago

Sound waves, by definition, cannot travel through a vacuum.

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Q: What is the speed of sound waves when travelling through a vacuum?
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