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Author Question: Rotation curves for spiral galaxies show A) they are slowing down. B) most have dark halos. C) ... (Read 87 times)

Diane

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on: Jul 27, 2018
Rotation curves for spiral galaxies show
 
  A) they are slowing down.
  B) most have dark halos.
  C) rotation speed drops off further from the nucleus.
  D) most of the mass lies in the nucleus.
  E) no relation to mass.

Question 2

If the collapsing star is over 25 solar masses, the core may form ________ in a hypernova event.
 
  A) a gamma-ray burster
  B) a millisencond pulsar
  C) an X-rays burster
  D) a pulsar
  E) a black hole


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dlook33

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

B

Answer to Question 2

E


Diane

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Reply 2 on: Jul 27, 2018
Great answer, keep it coming :)

duy1981999

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Reply 3 on: Yesterday
Excellent

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