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Question: The composite wall sketched in Figure is formed of five panels. Sketch the thermal resistance connection for the outside-to-inside heat flow. Knowing that l1 = l2 = l3 = 0.02 m, A1 = A2 = A3 = 25 m2 , A4 = A5 = 0.1 m2 , k1 = k5= 0.001 W/m-C, k2 = k4 = 0.9 W/m-C, k3 = 0.002 W/-C, io = 35°C, and ii = 20°C, find the heat flow rate penetrating from outside.

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