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Un tuyau en cuivre (longueur = 50 cm, diamtre extrieur = 2,5 cm, paisseur de la paroi = 2 mm) est bien isol thermiquement et

Un tuyau en cuivre (longueur = 50 cm, diamtre extrieur = 2,5 cm, paisseur de la paroi = 2 mm) est bien isol thermiquement et ses extrmits sont 0C. Un courant lectrique traverse le tuyau et dbite une nergie de 20 W. Dterminer le profil de temprature le long du tuyau et calculer la temprature au milieu du barreau. ( = 384 W/m.C

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