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It is not unusual for a 1000-kg car to get 30 mi/gal when traveling at 60 mi/h on a level road.
If this car makes a 200-km trip, how many joules of energy does it consume?Note that 1.0 gal of gasoline yields 1.3 109 J (although this can vary).
What is the average rate of energy consumption during the trip?
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