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Titulo: Presión.
Objetivo: Demostrar la ley de charles, por medio de las diferencias de presiones.
Demostrar que las presiones tienden a igualarse.
Materiales:
Agua
Lata con tapa hermética
Mechero
Procedimiento:
Poner agua a la lata
Calentar el agua hasta que comience a evaporarse .
Tapar rápidamente la lata.
Esperar a que termoestatize
Observar lo que pasa con la lata.
Precauciones:
Tener cuidado al manipular el agua caliente .
Cuidado con las manos al tocar la lata
Asegurarse de que la tapa quede realmente hermética
No utilizar un recipiente de plástico porque el calor hace que se desforme.
Que la lata no sea de un material grueso, para facilitar las observaciones.
Observaciones:
Vamos a ver que al ir disminuyendo la temperatura , la lata comenzara a aplastarce.
Podemos ver este procedimiento más acelerado, que nos demuestra mejor que es lo que pasa, si nosotros, colocamos la lata dentro de un recipiente con agua fría, para que la diferencia de temperatura sea brusca, veremos como se aplasta la lata en pocos segundos.
.
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Enviado por: Nestor Idioma: castellanoPaís: España