Consider Problem 1.1.

(a) If the exposed cold surface of the insulation is at T2 = 20°C, what is the value of the convection heat transfer coefficient on the cold side of the insulation if the surroundings temperature is Tsur = 320 K, the ambient temperature is T∞ = 5°C, and the emissivity is B = 0.95? Express your results in units of W/m2 ∙ K and W/m2 ∙ dc.

(b) Using the convective heat transfer coefficient you calculated in part (a), determine the surface temperature T2, as the emissivity of the surface is varied over the range 0.05 ≤ ε ≤ 0.95. The hot wall temperature of the insulation remains fixed at TI = 30°C. Display your results graphically.