A lamp filament radiates energy at a rate of 100 W when the temperature of the surroundings

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A lamp filament radiates energy at a rate of 100 W when the temperature of the surroundings is 20oC, and only 99.5 W when the surroundings are at 30oC. If the temperature of the filament is the same in each case, what is its temperature in Celsius?
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College Physics

ISBN: 978-0321601834

7th edition

Authors: Jerry D. Wilson, Anthony J. Buffa, Bo Lou

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