Homework Statement
Tungsten wire has an emissivity of 0.35. A tungsten filament in a light bulb can be considered to emit light only from the sides of the filament (consider it a cylinder... they are usually wire "cylinders" wrapped into coils.). If the operating temperature of the filament...
Homework Statement
At a steam power plant, steam engines work in pairs, the output of the first contributing to the heat input of the second. Let the operating temperature of the first be 670.0 degrees C and 440.0 degees C, and of the second be 430.0 degrees C and 290.0 degrees C. If the...