Physics, 15.07.2019 23:10 michaelFTP

The cylindrical filament in a light bulb has a diameter of 0.050 mm, an emissivity of 1.0, and a temperature of 3000°c. how long should the filament be in order to radiate 60 w of power? (σ = 5.67 × 10-8 w/m2 ∙ k4)

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