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Author Question: Which of the following worlds has the greatest difference in temperature between its no atmosphere ... (Read 51 times)

jc611

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on: Jul 27, 2018
Which of the following worlds has the greatest difference in temperature between its no atmosphere temperature and its actual temperature?
 
  A) Mercury
  B) Venus
  C) Earth
  D) the Moon
  E) Mars

Question 2

Which of the following correctly describes how the process of gravitational contraction can make a star hot?
 
  A) Gravitational contraction involves nuclear fusion, which generates a lot of heat.
  B) When a star contracts in size, gravitational potential energy is converted to thermal energy.
  C) Heat is generated when gravity contracts, because gravity is an inverse square law force.
  D) Gravitational contraction involves the generation of heat by chemical reactions, much like the burning of coal.


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eliasc0401

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Reply #1 on: Jul 27, 2018
Answer to Question 1

B

Answer to Question 2

B


jc611

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Reply 2 on: Jul 27, 2018
Thanks for the timely response, appreciate it

xiazhe

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Reply 3 on: Yesterday
Excellent

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