Multiple Choice
Which statement CORRECTLY describes the universe for the entire first 500,000 years of its life?
A) The universe was filled with free quarks (not confined inside neutrons or protons) .
B) All the fundamental forces of nature were unified into one force.
C) The universe was a filled with a sea of nuclear particles undergoing violent reactions.
D) The universe was opaque.
Correct Answer:
Verified
Correct Answer:
Verified
Q93: Einstein's general theory of relativity, as originally
Q148: Einstein chose his cosmological constant to be
Q149: Why does the cosmic microwave background appear
Q151: Suppose an object is at rest and
Q152: What is dark energy?<br>A) energy associated with
Q154: The expansion of the universe takes place:<br>A)
Q155: What is the "cosmological redshift"?<br>A) the stretching
Q156: Why is flatness a problem in cosmology?<br>A)
Q157: What causes cosmological redshift of photons that
Q177: In what way does the study of