10. Briefly explain the functioning of a thermos flask.
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The technical name of a thermos is a vacuum flask .To keep your drinks hot or cold, it minimizes heat transfer due to conduction and radiation. Convection is not included because convection keeps the temperature in a liquid even.
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Los termos eléctricos calientan el agua fría a través de la resistencia eléctrica que hay en su interior. Cuando el agua alcanza la temperatura marcada por el termostato, la resistencia se apaga y el termo acumula el agua caliente en su interior hasta el momento de uso.
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