Question

The figure shows the cross section of a wall made of three layers. The thicknesses of the layers are L_1, L_2 = 0.600 L_1, and L_3 = 0.200 L_1. The thermal conductivities are k_1, k_2 = 0.900 k_1, and k_3 = 0.620 k_1. The temperatures at the left and right sides of the wall are T_H = 24 degree C and T_C = -20 degree C, respectively. Thermal conduction is steady. (a) What is the temperature difference Delta T_2, across layer 2 (between the left and right sides of the layer)? If k_2 were, instead, equal to 1.020 k_1, (b) would the rate at which energy is conducted through the wall be greater than, less than, or the same as previously, and (c) what would be the value of Delta T_2?

Answer 1

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