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Q3. How many pounds of coal must be burned to keep one 100 -W light bulb lit for one hour? Assume the efficiency of the
Q3. How many pounds of coal must be burned to keep one 100 -W light bulb lit for one hour? Assume the efficiency of the power plant is 35%, the transmission losses are 10% of the delivered power, and the heating value of coal is 12,000BTU/lb
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