- #1
csnsc14320
- 57
- 1
Homework Statement
The temperature u in a star of conductivity 6 is inversely proportional to the distance from the center:
[tex] u = \frac{3}{\sqrt{x^{2} + y^{2} + z^{2}}} [/tex]
If the star is a sphere of radius 3, find the rate of heat flow outward across the surface of the star.
Homework Equations
The Attempt at a Solution
I really don't know what to do here - I have not learned about "conductivity" in terms of taking surface integrals and every example problem my teacher has done has involved a force function, yet this seems to only give a scalar temperature function.
So, I am thoroughly confused as to where to start?