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How much heat does a 40w bulb generates in an hour?


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Answered 2009-10-31 13:49:54

A light bulb has an efficiency of 10%. A 40 watt light bulb gives off 4 watts of light. That leaves 36 watts of heat. Now you can look up the formula to get the conversion factor to joules so you can get the right answer for your homework.

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