Задача 50332.

With the body surface area of 5 cm ^ 2 at a temperature T = 400 K during 10 minutes radiated power of 100 J. To determine the emissivity of the body at.

Detailed solution with a short recording conditions, laws and formulas used in the decision, the withdrawal of the calculation formula and the answer.
If you have any questions about the decision to write. I try to help.