Stars nearby to our sun have an average relative speed of about ...

[Metfan725]

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

[alexisweber49]

Answer to Question 1

B

Answer to Question 2

B

[Metfan725]

Thanks for the timely response, appreciate it

[chereeb]

TYSM