A certain lightbulb has a tungsten filament with a


A certain lightbulb has a tungsten filament with a resistance of 19.4 ? when at 20.0°C and 150 ? when hot. Assume the resistivity of tungsten varies linearly with temperature even over the large temperature range involved here.

Find the temperature of the hot filament.

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Physics: A certain lightbulb has a tungsten filament with a
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