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Physics, 05.08.2019 18:10 bobbye001

The glowing filament in a lamp is radiating energy at a rate of 60 {\rm w}. at the filament’s temperature of 1500{\rm ^\circ c}, the emissivity is 0.23.
what is the surface area of the filament? (in m2)

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The glowing filament in a lamp is radiating energy at a rate of 60 {\rm w}. at the filament’s temper...
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