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2015-07-27T19:05:16+05:30

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A space entirely devoid of matter is known as vaccume
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2015-07-27T19:07:57+05:30

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Vacuum is a place where air is not present or air is absent because a suction is created inside the vacuum . inside a vacuum no sound is heard because without air sound cannot travel from one place to other.
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any empty space is called vacuum like space
Do you think space is empty
Space does not have air that is why it is a vacuum