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# Thermal Conductivity: Ratio of Conductivities of Two Materials

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Problem. The ratio of thermal Conductivity of material 1 to the thermal
Conductivity of material 2 is
(a)Less than 1 (b) greater than 1 (c) equal to 1 (d) infinity
And why? Give reason
There is a plot given in problem file in which both material shown.

https://brainmass.com/physics/conduction/thermal-conductivity-ratio-conductivities-two-materials-5716

#### Solution Preview

Solution:
Reason:
According to Fourier's law of conduction
q = - k* (âˆ†T/âˆ†X)
Where q is the heat transfer per unit area
âˆ†T/âˆ†X = Change in temperature with distance
k ...

#### Solution Summary

The solution contains a detailed explanation as to how to compare the conductivities of two separate materials from a plot comparing temperature and distance.

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