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Author Question: During one phase of the big bang, gamma ray photons were creating electrons and positrons ... (Read 57 times)

Destiiny22

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on: Jul 27, 2018
During one phase of the big bang, gamma ray photons were creating electrons and positrons (anti-electrons). At this time, the Universe also contained ____.
 
  a. protons and antiprotons
 b. protons and neutrons
 c. neutrons only
 d. no other matter or antimatter
  e. neutral atoms

Question 2

Galileo proposed that the Sun is a rotating sphere after he ____.
 
  a. noted how the Sun rose in the east and set in the west
 b. discovered the parallax of the Sun
 c. timed a full rotation of the Sun's equator
 d. observed sunspots move across the surface of the Sun
 e. measured different spectral lines of emission on different days


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djpooyouma

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Reply #1 on: Jul 27, 2018
Answer to Question 1

b

Answer to Question 2

d


Destiiny22

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Reply 2 on: Jul 27, 2018
YES! Correct, THANKS for helping me on my review

helenmarkerine

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Reply 3 on: Yesterday
Gracias!

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