Consider a classroom for 55 students and one instructor, each generating heat at a rate of 100 w. lighting is provided by 18 fluorescent lightbulbs, 40 w each, andthe ballasts consume an additional 10 percent. determine the rate of internal heat generation in this classroom when it is fully occupied.

Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.

Aquick transition of the operating speed of a shaft from its critical speed will whirl amplitude. (a) increase (b) limit (c) not affect (d) zero

Consider airflow over a flat plate of length l = 1.5 m under conditions for which transition occurs at le = 0.9 m based on the critical reynolds number, re,e = 5 x 10. evaluating the thermophysical properties of air at 400 k, determine the air velocity. (hint: use the tables to find the properties of air)