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Homework Help
Introductory Physics Homework Help
Solving 100W Lightbulb Filament Surface Area Problem
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[QUOTE="courtneywetts, post: 4507522, member: 488300"] [h2]Homework Statement [/h2] The filament of typical light bulb is at a temperature of about 3,000 K. For a 100 W bulb, what is the surface area of the filament. You can assume that the entire 100 W goes into heating the filament and the filament has an emissivity of 1.[h2]Homework Equations[/h2] The equation is P= e(sigma)(A)(T^4) P is power e is the emissivity sigma is the constant 5.67 x 10 ^-5 [h2]The Attempt at a Solution[/h2] I have gotten to the point where i got 2.2 x 10^-5 m. The answer in the back of the book is 22 mm^2. I can't figure out how this was gotten. [/QUOTE]
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Introductory Physics Homework Help
Solving 100W Lightbulb Filament Surface Area Problem
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