# Thermal Conductivity: Ratio of Conductivities of Two Materials

Please see the attached file for the entire problem.

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:

Answer will be (a)

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.

$2.19