A black body of surface area 2 x 10-3m2is heated to 127°C and is suspended in a room having temperature 27°C. Find the initial rate of loss of heat from the black body. An electric heater emits 1000...

A black body of surface area 2 x 10-3m2is heated to 127°C and is suspended in a room having temperature 27°C. Find the initial rate of loss of heat from the black body.

An electric heater emits 1000 watts of thermal radiation. The filament has surface area 0.06 m2and may be presumed as black body. Find its temperature if a = 6 x 10-8W/m2K4.