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2. Una tubera por donde circula vapor de agua con temperatura exterior de 120C y dimetro exterior de 10 cm, est cubierta con una

2. Una tubera por donde circula vapor de agua con temperatura exterior de 120C y dimetro exterior de 10 cm, est cubierta con una capa de aislante de 5 cm (K=0.15 W/mK), si la superficie externa del aislante est a 35C. determine: a) La transferencia de calor por unidad de longitud. b) La resistencia trmica del aislamiento.

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