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Author Question: The Tharsis Bulge on Mars is roughly the size of: A) Mexico. B) Asia. C) Texas. D) North ... (Read 52 times)

james9437

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on: Jul 27, 2018
The Tharsis Bulge on Mars is roughly the size of:
 
  A) Mexico.
  B) Asia.
  C) Texas.
  D) North America.
  E) New York City.

Question 2

In what sense is all observable deuterium primordial? Why is its abundance so important in cosmology?
 
  What will be an ideal response?


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blfontai

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

D

Answer to Question 2

Deuterium is created in stellar cores now, but just as quickly consumed in the making of helium on the main sequence. So any free deuterium must be left over from primordial nucleosynthesis; its survival means that the matter density could not have been anywhere near critical.


james9437

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Reply 2 on: Jul 27, 2018
YES! Correct, THANKS for helping me on my review

essyface1

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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