The time-dependent temperature within a sphere of unit
Chapter 13, Problem 13.1.47(choose chapter or problem)
The time-dependent temperature within a sphere of unit radius is determined from Solve for u(r, t). [Hint: Verify that the left-hand side of the partial differential equation can be written as . Let ru(r, t) v(r, t) c(r). Use only functions that are bounded as ]
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