A composite hollow sphere with steady internal heating is made of 2 layers of materials of equal thickness with thermal conductivities in the ratio of 1 : 2 for inner to outer layers. Ratio of inside to outside diameter is 0.8 What is ratio of temperature drop across the inner and outer layers?

A composite hollow sphere with steady internal heating is made of 2 la

1.	A composite hollow sphere with steady internal heating is made of 2 layers of materials of equal thickness with thermal conductivities in the ratio of 1 : 2 for inner to outer layers. Ratio of inside to outside diameter is 0.8 What is ratio of temperature drop across the inner and outer layers?
A.	0.4
B.	1.6
C.	2 In 0.8
D.	2.5
Answer» E.

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A composite hollow sphere with steady internal heating is made of 2 layers of materials of equal thickness with thermal conductivities in the ratio of 1 : 2 for inner to outer layers. Ratio of inside to outside diameter is 0.8 What is ratio of temperature drop across the inner and outer layers?

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