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Author Question: Stars nearby to our sun have an average relative speed of about 70,000 km/hour. How fast is that in ... (Read 89 times)

Metfan725

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on: Jul 27, 2018
Stars nearby to our sun have an average relative speed of about 70,000 km/hour. How fast is that in km/s?
 
  A) about 3000 km/s B) about 20 km/s
  C) about 1200 km/s D) about 4.2 million km/s

Question 2

What eventually halts the gravitational collapse of an interstellar gas cloud that forms an object that is not massive enough to become a star?
 
  A) Nothing; all collapsing gas clouds become black holes.
  B) the crowding of electrons in the core
  C) A critical fraction of the gas has been driven further into space.
  D) the central object becoming hot enough to sustain nuclear fusion in its core


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alexisweber49

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

B

Answer to Question 2

B


Metfan725

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Reply 2 on: Jul 27, 2018
Gracias!

mochi09

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Reply 3 on: Yesterday
Wow, this really help

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