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If a coal-fired power plant burns 2 kg of coal to produce electricity, and the electricity...

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Physics

If a coal-fired power plant burns 2 kg of coal to produceelectricity, and the electricity is used to power an elevator motorthat is 60% efficient, how high can the elevator and passengers belifted up if their total mess is 1500 kg?

and then How many human workers using muscle power('energyservants\") would be needed to lift the elevator up to the sameheight, if they had one minute to do so?

Assuming that one energy servant is 100w of energy and the coalpower plant is 33% efficient. ANd 29MJ/kg in coal

Answer & Explanation Solved by verified expert
4.0 Ratings (581 Votes)
Energy obtained by burning 2kg of coal at 60 percent efficiencyisThe energy    See Answer
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