Answers

2016-03-10T06:18:21+05:30
The sound needs a medium to travel. But if there is vaccum, there is no medium to travel. so sound cannot travel through vaccum.
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2016-03-10T06:35:22+05:30
Sound cannot in  vacuum it always needs a medium to travel. Sounds can travel fastest in solids, medium in liquids and and very slow in gases.
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