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

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Author Question: Earth's primary energy source is A) the Sun. B) fossil fuel. C) electricity. D) ... (Read 64 times)

Chloeellawright

Hero Member
Posts: 588

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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Marked as best answer by a Subject Expert

allisonblackmore

Sr. Member
Posts: 330

Reply #1 on: Jul 29, 2018

Answer to Question 1

Answer: A

Answer to Question 2

Answer: A

Chloeellawright

Hero Member
Posts: 588

Reply #2 on: Jul 29, 2018

Thanks

allisonblackmore

Sr. Member
Posts: 330

Reply #3 on: Jul 29, 2018

Welcome

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Author Question: Earth's primary energy source is A) the Sun. B) fossil fuel. C) electricity. D) ... (Read 64 times)

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