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Question

Two astronauts are floating close to each other in space. Can they talk to each other without using any special device? Give reason.​

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Solution

Sound always required a medium to travel, as to travel it requires particles. ​
The space is completely vacuum, and it does not provide any medium for sound to propagate. If two astronauts talk to each other without using any special device they won’t be able to hear each other.​

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