How much energy will be emitted from a furnace at 3000K temperature active as a perfect black body per unit area in 1 hour ? (sigma=5.7xx10^(-8)" Wm"^(-2)K^(-4))

How much energy will be emitted from a furnace at 3000K temperature ac

1.	How much energy will be emitted from a furnace at 3000K temperature active as a perfect black body per unit area in 1 hour ? (sigma=5.7xx10^(-8)" Wm"^(-2)K^(-4))
Answer» `1.1xx10^(12)J` `1.7xx10^(10)J` `4.6xx10^(6)J` `2.8xx10^(8)J` Solution :`W=AesigmaT^(4)t` `=(1)(1)xx5.7xx10^(-8)XX(3000)^(4)xx3600` `=16621.1xx10^(6)=1.66212xx10^(10)J` `~~1.7xx10^(10)J`