Multiple Choice
Which of these statements describes the state of the universe during the inflationary epoch, from approximately 10-35 s to 10-33 s after the Big Bang?
A) There were only two distinct forces: the strong, weak, and electromagnetic theories were all unified at that time.
B) There were only three distinct forces: gravity, strong, and electroweak forces.
C) Only quarks existed but they had not yet formed into other elementary particles.
D) Elementary particles such as neutrons and protons existed but they had not yet formed nuclei.
Correct Answer:

Verified
Correct Answer:
Verified
Q149: Why does the observable universe have an
Q150: What experimental evidence do physicists have for
Q151: Which two forces are infinite in extent?<br>A)
Q152: Which of the four fundamental forces holds
Q153: According to Hubble's law, how old is
Q155: Grand unified theories, or GUTs, predict that
Q156: When is the weak nuclear force encountered?<br>A)
Q157: Who first predicted the existence of the
Q158: How does the observed amount of visible
Q159: Where is Earth?<br>A) at the exact center