An old lightbulb draws only 50.0 W, rather than its original 60.0 W, due to evaporative
Chapter 20, Problem 57(choose chapter or problem)
An old lightbulb draws only 50.0 W, rather than its original 60.0 W, due to evaporative thinning of its filament. By what factor is its diameter reduced, assuming uniform thinning along its length? Neglect any effects caused by temperature differences.
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