Author Question: What key event happened during the decoupling epoch? A) Pairs of neutrons and protons were ... (Read 53 times)

Wadzanai

  • Hero Member
  • *****
  • Posts: 528
What key event happened during the decoupling epoch?
 
  A) Pairs of neutrons and protons were created.
  B) Electrons and positrons were created.
  C) Expansion cooled the universe enough that protons could capture electrons in orbit.
  D) Dark energy accelerated the cosmos on to infinity.
  E) The universe underwent a brief period of very rapid expansion.

Question 2

Mars' mass is only a tenth of the Earth's, and its density is also less than the Earth's.
 
  Indicate whether the statement is true or false



fraziera112

  • Sr. Member
  • ****
  • Posts: 356
Answer to Question 1

C

Answer to Question 2

TRUE



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.

Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Did you know?

Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.

Did you know?

There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

Did you know?

Human kidneys will clean about 1 million gallons of blood in an average lifetime.

For a complete list of videos, visit our video library