I have a 100 watt light bulb inside a steel cube. The outside air temperature is 75 degrees. How how is the air inside the cube?
I actually want the general solutionm - I've just concocted a typical problem. Approximations are definitely appropriate - I'm looking for a method of quick estimation.
Also, I'm not I sure even asked the right question, I may have left out some needed info (which you can add, but don't make is too hard.)