1. The problem statement, all variables and given/known data Calculate the surface temperature of a stainless steel junction box that is in a 35C ambient temperature environment. There are electrical "boxes" that generate 30W of heat inside of this box. 2. Relevant equations (1) Q_dot_total = Q_dot_conv + Q_dot_rad (2) Q_dot_conv = hA(Ts-T∞) (3) Q_rad = εσ(Ts4 - Tsurr4) 3. The attempt at a solution After combining equations 2 and 3 into 1 and solving for Ts, I get a 4th order equation. When entering this equation into a solver, it gives me ridiculously high numbers (like 21000 degrees C). Any help would be appreciated.