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Asked Dec 25, 2019
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Figure CQ11.11 shows a composite bar made of three different materials that connects a hot reservoir at 100°C to a cold reservoir at 0°C. If the sections A, B, and C all have the same dimensions and the temperatures shown in the figure are constant, rank the thermal conductivities from largest to smallest.

100°C
0°C
70°C
80°C
kA
Кв
kc
Figure CQ11.11
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100°C 0°C 70°C 80°C kA Кв kc Figure CQ11.11

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The heat flow will be same as the bar is ...

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к (100- 80) - к, (80- 70)- к, (70— 0) 2K, - К,-7к, - с(say) K,=, ,fк,- к, ск, К, —с, к,

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