A Wall Has Two Layers a and B, Each Made

question 50

Multiple Choice

A wall has two layers A and B, each made of a different material. Both the layers have the same thickness. The thermal conductivity of material of A is twice that of B. Under the thermal equilibrium the temperature difference across the wall is 30°C. The temperature drops in layers A and B will be respectively

• A)15°C and 15°C
• B)cannot be predicated
• C)37,500 kg
• D)10°C and ² 0°C
• E)20°C and 10°C

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