Based on inventoried matter in the universe, including dark ...

[evelyn o bentley]

Based on inventoried matter in the universe, including dark matter known to exist in galaxies and clusters, the actual density of the universe is what fraction of the critical density?
 
  A) 1 percent
  B) 10 percent
  C) 26 percent
  D) 74 percent
  E) 100 percent

Question 2

What can we detect from matter that has crossed an event horizon?
 
  A) Gamma-ray bursts
  B) Radio waves if the matter was traveling fast enough
  C) Visible light
  D) X-rays if the matter was dense
  E) Nothing

[bitingbit]

Answer to Question 1

C

Answer to Question 2

E

[evelyn o bentley]

Thanks for the timely response, appreciate it

[sultansheikh]

Gracias!