Question: A spherical shell has inside radius r = r 1 and outside radius r = r 2 . At the inside surface it is electrically

A spherical shell has inside radius r=r1 and outside radius r=r2. At the inside surface it is electrically heated at a rate of q1Wm2, and at the outer surface it dissipates heat by convection with the heat transfer coefficient h2 into the ambient air temperature T2. Write the governing heat equation and boundary conditions. I am confused on how to solve this problem correctly.
A spherical shell has inside radius r = r 1 and

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