Solve the following problem:
Q: A steam pipe of 0.12-m outside diameter is insulated with a layer of calcium silicate.
(a) If the insulation is 20 mm thick and its inner and outer surfaces are maintained at Ts,1 = 800 K and Ts.2 = 490 K, respectively, what is the heat loss per unit length (q') of the pipe function of the dimensionless radial coordinate, (r - r1) / (r2 - r1), where r1 = 0.06 m and r2 is a variable (0.06 < r2="">< 0.20="" m).="" compute="" and="" plot="" the="" heat="" loss="" as="" a="" function="" of="" the="" insulation="" thickness="" for="" 0="">< (r2="" -="" r1)="">< 0.14="">