Collaborate 3.2

Let us examine the sense of equation (3.20) using a plot of the temperature profile shown in Figure 3.

a. Determine the sign of dT/dz at z = 0 and at z = L.

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b. Is dT/dz larger at z = 0 or at z = L?

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c. Based on your answer to part b and equation 3.20, is the net heat flow in or out of the rod?

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d. Is this consistent with heat generation by an electric current in the steady state?

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