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Author Question: Earth's primary energy source is A) the Sun. B) fossil fuel. C) electricity. D) ... (Read 85 times)

Chloeellawright

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on: Jul 29, 2018
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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Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: A

Answer to Question 2

Answer: A


Chloeellawright

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Reply #2 on: Jul 29, 2018
Thanks


allisonblackmore

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Reply #3 on: Jul 29, 2018
Welcome :)


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