Repeat Problem 17.41 for the case of an aluminium beam.

Data From Problem 17.41

A steel I-beam with a cross-sectional area as shown has its lower and upper surfaces maintained at 700 and 370 K, respectively.
a. Assuming a negligible temperature change through both flanges, develop an expression for the temperature variation in the web as a function of the distance from the upper flange.

b. Plot the temperature profile in the web if the convective heat-transfer coefficient between the steel surface and the surrounding air is 57 W/m² · K. The air temperature is 300 K.
c. What is the net heat transfer at the upper and lower ends of the web?

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