Chapter 8: Problem 20
List at least five ways in which your life benefits from fossil fuels.
Short Answer
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Chapter 8: Problem 20
List at least five ways in which your life benefits from fossil fuels.
These are the key concepts you need to understand to accurately answer the question.
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Get started for freeAs we exploit the best coal resources first, working our way from the premium Anthracite towards Lignite (Table \(8.1\) ), will we need to mine more coal, or less, to achieve the same energy output from coal, in terms of mass removed?
List at least three negative impacts of fossil fuels that most concern you (or explain why not, if they don't concern you).
A gallon of gasoline contains about \(37 \mathrm{kWh}\) of energy and costs about \(\$ 4\), while a typical AA battery holds about \(0.003 \mathrm{kWh}\) and costs about \(\$ 0.50\) each, in bulk. By what factor are batteries more expensive, for the same amount of energy?
Proven remaining reserves of oil, gas, and coal are 10,8, and \(20 \mathrm{ZJ},{ }^{88}\) while we have used 8,4, and \(8 \mathrm{ZJ}\) of each. What fraction of the original total fossil fuel resource have we already used, then?
Putting the cheapness of fossil fuels into perspective, a gallon of gasoline purchased for \(\$ 4\) might deliver \(6 \mathrm{kWh}\) of mechanical energy after accounting for efficiency of the associated engine. A laborer might be expected to export \(100 \mathrm{~W}\) of mechanical power, on average, and be limited to 8 hours per day. How many hours would it take for the laborer to accomplish the equivalent output of a gallon of gasoline? At a rate of \(\$ 15 / \mathrm{hr}\), how much will this cost you?
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