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Un recipiente metlico esfrico de paredes delgadas se usa para almacenar nitrgeno lquido a 77 K. El recipiente tiene un dimetro de 0,46 m y

Un recipiente metlico esfrico de paredes delgadas se usa para almacenar nitrgeno lquido a 77 K. El recipiente tiene un dimetro de 0,46 m y un espesor de 0,09 m. La superficie externa se expone al aire ambiente a 300 K y se sabe que la conductividad trmica del metal es k = 50,2 W/m*K. Calcular la resistencia trmica, en K/W, del recipiente esfrico en estas condiciones de temperatura. Corrija su respuesta a tres cifras significativas (use notacin cientfica si es necesario).

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