Consider a burner of diameter D= 180 mm operating at a uniform surface temperature of Ts= 230°C in ambient air at [infinity] T[infinity]= 20°C. Without a pot or pan on the burner, what are the rates of heat loss by radiation and convection from the burner? If the efficiency associated with energy transfer from the heaters to the burners is 90%, what is the electric power requirement? At what wavelength is the spectral emission a maximum?