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Author Question: Seasons here are Earth are a result of A) the rotation of our planet about its axis. B) the ... (Read 55 times)

javeds

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on: Jul 29, 2018
Seasons here are Earth are a result of
 
  A) the rotation of our planet about its axis.
  B) the revolution of our planet around the Sun.
  C) the movement of our planet within the Milky Way.
  D) the tilt of Earth's axis.

Question 2

What happens to a star when the fusion cycle gets to the element iron?
 
  What will be an ideal response?


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bd5255

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

Answer: D

Answer to Question 2

Answer: When elements near iron, or iron itself is fused, energy is absorbed by the fusion reaction instead of released. This cools rather than heats the star, and the show is over. The star then undergoes collapse without rekindling. The most massive of these stars may supernova.


javeds

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Reply 2 on: Jul 29, 2018
Great answer, keep it coming :)

apple

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Reply 3 on: Yesterday
Excellent

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