A tungsten filament in a lamp is heated to a temperature of 2.6 103 K by

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A tungsten filament in a lamp is heated to a temperature of 2.6 × 103 K by an electric current. The tungsten has an emissivity of 0.32. What is the surface area of the filament if the lamp delivers 40.0 W of power?

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Physics

ISBN: 978-0077339685

2nd edition

Authors: Alan Giambattista, Betty Richardson, Robert Richardson

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Question Posted: Jun 06, 2016 05:31 AM

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A tungsten filament in a lamp is heated to a temperature of 2.6 103 K by

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