Question: Derive the general 3D heat conduction equation through a rectangular volume element of length Ax, width Ay, and height Az. Assume the density of the

Derive the general 3D heat conduction equation through a rectangular volume element of length Ax, width Ay, and height Az. Assume the density of the body is p and the specific heat is Cp. Present the cases for (i) steady state but heat generation and (ii) no heat generation and steady state. Appropriate assumptions should be explicitly stated.

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