Solved: How many joules of energy are required to run a 100 w light, Physics

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How many joules of energy are required to run a 100 w light

How many joules of energy are required to run a 100 W light bulb for one day? Burning coal yields about 30. 106 J of energy per kg of coal burned. Assuming that the coal power plant is 30% efficient, how much coal has to be burned to light that light bulb for one day?

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