An energy of W = 83 J is emitted from the surface of a carbon black with an area S = 2 cm2 at a temperature of T = 400 K for a time t = 5 min. Determine the coefficient of thermal radiation aT of carbon black.

Detailed solution with a brief record of the conditions, formulas and laws used in the decision, the conclusion of the calculation formula and the answer.
If you have any questions about the decision, write. I will try to help. File in image format.