posted by Samantha .
The global-mean surface temperature of the earth is about 288 degrees Kelvin. Use the Stefan-Boltzman law to calculate the radiative flux corresponding to an object with this temperature. [hint: use σT4 with σ = 5.67x10-8 Wm-2K-4 ]
what's the problem? You have the formula:
5.67x10^-8 * 288^4 = 390.08W/m^2