# Heat Transfer

A point source of heat of power $$P$$ is placed at the center of a spherical shell of mean radius $$R$$. The material of the shell has thermal conductivity$$K$$. Calculate the thickness of the shell if the temperature difference between the outer and inner shell in steady state is $$T$$.

The thickness $$t$$ can be given by: $$\frac{A R^2 K T}{P}$$, where $$A$$ is a constant.

Find the value of $$A$$ correct upto three decimal places.

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