Com suren els vaixells?

Com pot es pot mantenir un vaixell de metall pesat a la superfície de l'aigua si una barra de metall o una moneda petita s'enfonsen? Un matemàtic va trobar la resposta fa més de 2000 anys. Però, què tenen a veure les mates amb això? Fes clic aquí per veure més vídeos:

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