1. The coal provided 29 percent of the world\'s energy consumptio 519 quadrillio

Question

1. The coal provided 29 percent of the world's energy consumptio 519 quadrillion Btu in 2011 Assuming coal has an average energy content of 10,000 Btu per pound, how much coal was consumed? 2. According to the U.S. Federal Highway Administration's recent data, on average we drive nearly 13,500 miles per year Let us now calculate the amount of energy consumed by driving our vehicles, assuming an average fuel economy rating of 25 miles per gall (mpg), and compare it to the 2011 United States per capita energy consumption of 313 million Btu Note that gasoline has an average energy content of 124,000 Btu pe gallon

Explanation / Answer

For 1 pound, energy is 10000 Btu. 519 quadrillion is 519 x 1015 Btu. Amount of consumed coal is 519 x 1015/104 519 x 10¹¹ pounds.

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