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Author Question: As of right now, the universe is apparently composed of ________ visible baryonic matter, _________ ... (Read 73 times)

dalyningkenk

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on: Jul 28, 2018
As of right now, the universe is apparently composed of ________ visible baryonic matter, _________ undetectable dark matter, and __________ undetectable dark energy. (Fill in the missing blanks.)
  a. 4 , 23 , 73
  b. 30 , 0 , 70
  c. 77 , 23 , 0
  d. 73 , 4 , 23
  e. 93 , 3 , 4

Question 2

Which of the following statements DOES NOT show fundamentally how other realms of physics are interconnected to research in cosmology and astronomy?
 
a. Particle and nuclear physics explains nucleosynthesis to justify the Big Bang.
  b .The inflationary theory explains the existence of the cosmic microwave background.
  c. Quantum mechanics explains the formation of neutron stars.
  d. General relativity explains gravitational lensing.
  e. Nuclear physics explains fusion reactions within stars and our Sun.


shaquita

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Reply #1 on: Jul 28, 2018
Answer to Question 1

a.
Although the amount of visible matter seems small, observing conditions in our own universe (flatness, homogeneity, chemical composition, observed density) and extrapolation of that data lead to the above ratio.

Answer to Question 2

b.
This statement is not true. The inflationary theory governed the very early universe. The Cosmic Microwave Background occurred when photons were no longer energetic enough to ionize atoms. Indeed, the great homogeneity of the CMB is explained in the inflationary theory, but the theory does not explain the existence of the CMB.


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dalyningkenk

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Reply #2 on: Jul 28, 2018
TY


shaquita

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Reply #3 on: Jul 28, 2018
You're welcome


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