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A battery rated at 7.2 V and 10000 J is connected across a lightbulb. Assume that the internal resistance of the battery is zero. Further

 A battery rated at 7.2 V and 10000 J is connected across a lightbulb. Assume that the internal resistance of the battery is zero. Further assume that the resistance of the lightbulb is 100 ohm. What is the power delivered by the battery? How long will the battery last? 

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