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Intranet

Sorres movedisses

Objectiu: Preparar un fluid no newtonià

  • Materials de laboratori

    Envàs de plàstic

    cullera

  • Reactius

    Aigua

    Maizena

  • Preguntes

    Què és un fluid no newtonià?

    Hi ha altres exemples de fluids no newtonians?

    Tots els fluids no newtonians es comporten igual?

Procediment

  • Poseu mig paquet de farina de blat de moro al recipient.
  • A poc a poc anem afegint una mica d’aigua tot barrejant fins que aconseguim una mescla no massa espessa i la deixem reposar una estona.
  • Reposa la cullera i observa com s’enfonsa. A continuació, toquem la superfície i veiem com rebota.
  • Fes el mateix amb la nostra mà. Prenem una mica i veiem com ens llisca entre les mans. Aleshores intentem punxar-lo.

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