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Author Question: Earth's primary energy source is A) the Sun. B) fossil fuel. C) electricity. D) ... (Read 72 times)

Chloeellawright

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Earth's primary energy source is
 
  A) the Sun.
  B) fossil fuel.
  C) electricity.
  D) geothermal.

Question 2

A car's engine is 20 efficient. When cruising, the car encounters an average retarding force of 1000 N. If the energy content of fuel is 40 megajoules per liter, how many kilometers per liter does the car achieve?
 
  A) 8
  B) 10
  C) 12
  D) 14
  E) none of the above



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allisonblackmore

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Answer to Question 1

Answer: A

Answer to Question 2

Answer: A





 

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