# Question: A diffuse surface having the following spectral characteristics

A diffuse surface having the following spectral characteristics is maintained at 500 K when situated in a large furnace enclosure whose walls are maintained at 1500 K:

(a) Sketch the spectral distribution of the surface emissive power E A and the emissive power Eλ,h that the surface would have if it were a blackbody.

(b) Neglecting convection effects, what is the net heat flux to the surface for the prescribed conditions?

(c) Plot the net heat flux as a function of the surface temperature for 500 < T < 1000 K. On the same coordinates, plot the heat flux for a diffuse, gray surface with total emissivities of 0.4 and 0.8.

(d) For the prescribed spectral distribution of ελ, how do the total emissivity and absorptivity of the surface vary with temperature in the range 500 < T < 1000 K?

(a) Sketch the spectral distribution of the surface emissive power E A and the emissive power Eλ,h that the surface would have if it were a blackbody.

(b) Neglecting convection effects, what is the net heat flux to the surface for the prescribed conditions?

(c) Plot the net heat flux as a function of the surface temperature for 500 < T < 1000 K. On the same coordinates, plot the heat flux for a diffuse, gray surface with total emissivities of 0.4 and 0.8.

(d) For the prescribed spectral distribution of ελ, how do the total emissivity and absorptivity of the surface vary with temperature in the range 500 < T < 1000 K?

## Answer to relevant Questions

For each pair of atomic sentences, give the most general unifier if it exists:a. P(A, B, B), P(x, y, z).b. Q(y, G (A, B)), Q (G(x, x), y)c. Older (Father (y), y), Older (Father(x), John).d. Knows (Father (y), y), Knows(x, x).Write down logical representations for the following sentences, suitable for use with Generalized Modus Ponens:a. Horses, cows and pigs arc mammals.b. An offspring of a horse is a horse.c. Bluebeard is a horse,d. Bluebeard ...In this exercise, we will consider the implementation of search algorithms in Prolog. Suppose that successor (X, Y) is true when state Y is a successor of state X; and that goal (X) is true when X is a goal state. Write a ...In this exercise, we will consider the problem of planning a route for a robot to take from one city to another. The basic action taken by the robot is Go (x, y), which takes it from City x to city y if there is a direct ...Define the predicates Before, After, during, and Overlap, using the predicate Meet and the functions Start and End, hut not the function Time or the predicatePost your question