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The filament in a light bulb has a diameter of 0.050 mm and an emissivity of 1.0. The temperature of the filament is 3000C.
The filament in a light bulb has a diameter of 0.050 mm and an emissivity of 1.0. The temperature of the filament is 3000C. What should be the length of the filament so it will radiate 60 W of power? The Stefan-Boltzmann constant is 5.670 10-8 W/m2 K4. A) 11 cm B) 9.4 cm C) 8.6 cm D) 7.2 cm E) 5.9 cm
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College Physics
Authors: OpenStax
2nd Edition
171147083X, 978-1711470832
