Chapter 7, Problem 14P

Thermal conductivity k is a measure of the ability of a material to conduct heat (Fig. P7-14). For conduction heat transfer in the x-direction through a surface normal to the x-direction. Fourier's Ian of heal conduction is expressed as
   ${\stackrel{\dot{}}{Q}}_{conduction}=-kA\frac{dT}{dx}$

where ${\stackrel{\dot{}}{Q}}_{conduction}$ is the rate of heat transfer and A is the area normal to the direction of heat transfer. Determine the primary dimensions of thermal conductivity (k). Look up a value of k in the appendices and verify that its SI units are consistent with your result. In particular, write the primary SI units of k.