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Author Question: If WIMPs really exist and make up most of the dark matter in galaxies, which of the following is not ... (Read 17 times)

809779

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on: Jul 27, 2018
If WIMPs really exist and make up most of the dark matter in galaxies, which of the following is not one of their characteristics?
 
  A) They travel at speeds close to the speed of light.
  B) They are subatomic particles.
  C) They can neither emit nor absorb light.
  D) They tend to orbit at large distances from the galactic center.

Question 2

For what type of object is the period-luminosity relation used for determining distances?
 
  A) RR Lyrae variables
  B) T Tauri variables
  C) Cepheids
  D) Cataclysmic variables
  E) Planetary nebulae


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cadimas

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

A

Answer to Question 2

C


809779

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Reply #2 on: Jul 27, 2018
TY


cadimas

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Reply #3 on: Jul 27, 2018
You're welcome


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