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Author Question: Relate the Galaxy's spiral arms to the spiral-density wave theory. What will be an ideal ... (Read 171 times)

2125004343

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on: Jul 27, 2018
Relate the Galaxy's spiral arms to the spiral-density wave theory.
 
  What will be an ideal response?

Question 2

At what core temperature does hydrogen begin to fuse to helium?
 
  A) 3,000 K
  B) 5,800 K
  C) 1 million K
  D) 10 million K
  E) 100 million K


lindahyatt42

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

Spiral-density waves compress the gas and dust and lead to new star formation, making these regions of higher density bright and blue with new stars. The wave motion is slower than the rotation, and not tied to it, so it can keep going for billions of years.

Answer to Question 2

D


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2125004343

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Reply #2 on: Jul 27, 2018
Thank you!


lindahyatt42

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Reply #3 on: Jul 27, 2018
Always glad to help...


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