A 40 W (120 V) lightbulb has a tungsten filament of thickness 0.040 mm. The filament's operating

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A 40 W (120 V) lightbulb has a tungsten filament of thickness 0.040 mm. The filament's operating temperature is 1500°C.

a. How long is the filament?

b. What is the resistance of the filament at 20°C?

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College Physics A Strategic Approach

ISBN: 9780321595492

2nd Edition

Authors: Randall D. Knight, Brian Jones, Stuart Field

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Question Posted: Nov 03, 2023 02:26 PM

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A 40 W (120 V) lightbulb has a tungsten filament of thickness 0.040 mm. The filament's operating

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a The resistance of a wire is given by the equation R LA where R is the resistance in ohms is the re...View the full answer

College Physics A Strategic Approach

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