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Can cans and string really be used like a telephone?

Can cans and string really be used like a telephone?

BrainStuff

February 3, 20144m 4s

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Show Notes

You've probably heard of this trick before: Connecting two cans with a piece of string in the bottom of each can will supposedly allow people to speak over a distance to one another. Tune in as Marshall Brain explains how it works in this episode.

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