The crossover point from radiation to matter domination occurred: ...

[soccerdreamer_17]

The crossover point from radiation to matter domination occurred:
 
  A) when the strong force separated from the other two forces.
  B) with the emission of the cosmic background radiation.
  C) about 50,000 years after the Big Bang, at a temperature of about 16,000 K.
  D) with the creation of neutrons and protons, at about 1013 K.
  E) with the creation of electrons and positrons at about 6  109 K.

Question 2

The core of the Milky Way, Sagittarius A, is a strong radio source in the sky.
 
  Indicate whether the statement is true or false

[canderson530]

Answer to Question 1

C

Answer to Question 2

TRUE

[soccerdreamer_17]

Thank you!

[canderson530]

Always glad to help...