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Can two cans and a string really be used to talk over a distance?

I was watching an old movie today, and two kids (neighbors) were talking to each other using two tin cans and a string. Does that really work? If so, why does it work?

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  • 7 años:
    • Sociología
    • Biología
  • 8 años:
    • Sociología
    • Biología

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