It is of interest to see how the shape of the graph of the
solution (5.6) found in Problem 5.2
depends on the sign of
. Suppose
= 300 K,
= 500 K,
= 1m,
= 80.2 W/mK.
For each of the values
, , , find from equation (5.4), then plot (5.6) on the closed
interval . (The conductivity relation for iron is well
approximated by (5.1) when
, ,
.) What qualitative differences do you
observe among these curves?