A 13 cm by 13 cm steel angle with the dimensions shown is attached to a wall with a surface temperature of 600 K. The surrounding air is at 300 K, and the convective heat-transfer coefficient between the angle surface and the air is 45 W/m²· K.
a. Plot the temperature profile in the angle, assuming a negligible temperature drop through the side of the angle attached to the wall.
b. Determine the heat loss from the sides of the angle projecting out from the wall.

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Thickness = 1.59 cm -13 cm