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Author Question: Our Sun is considered to be a(n) ________. A) brown dwarf B) low-mass star C) high-mass star D) ... (Read 47 times)

nramada

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on: Jul 27, 2018
Our Sun is considered to be a(n) ________.
 
  A) brown dwarf B) low-mass star
  C) high-mass star D) intermediate-mass star

Question 2

How do X-ray measurements help us measure the amount of dark matter in galaxy clusters?
 
  A) X-rays are emitted by hot gas, and the intracluster gas is heated by collisions with dark matter particles. More dark matter leads to greater heating, and hence stronger X-ray emission.
  B) Dark matter absorbs X-rays. Therefore, more dark matter leads to weaker X-ray emission from galaxy clusters.
  C) X-rays are emitted by hot gas, and the intracluster gas is heated by the gravitational effects of dark matter. More dark matter leads to greater heating, and hence stronger X-ray emission.


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javimendoza7

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

B

Answer to Question 2

C


nramada

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Reply 2 on: Jul 27, 2018
Excellent

helenmarkerine

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Reply 3 on: Yesterday
Gracias!

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