This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Which of the following is true of the Universe when it was three minutes old? A) Photons ... (Read 11 times)

CBme

  • Hero Member
  • *****
  • Posts: 548
on: Jul 27, 2018
Which of the following is true of the Universe when it was three minutes old?
 
  A) Photons continuously produced neutron-antineutron pairs.
  B) Protons and neutrons linked to form deuterium.
  C) Most nuclear reactions had stopped.
  D) Nuclear reactions had stopped completely.

Question 2

Which of the following is true of the cosmic microwave background?
 
  A) It is radiation that existed before the big bang.
  B) It appears to come from a blackbody.
  C) It is radiation present in the ultraviolet spectrum.
  D) It has a very small redshift of about 10.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Silverbeard98

  • Sr. Member
  • ****
  • Posts: 355
Reply #1 on: Jul 27, 2018
Answer to Question 1

C

Answer to Question 2

B


CBme

  • Member
  • Posts: 548
Reply 2 on: Jul 27, 2018
Great answer, keep it coming :)

scottmt

  • Member
  • Posts: 322
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

Did you know?

Limit intake of red meat and dairy products made with whole milk. Choose skim milk, low-fat or fat-free dairy products. Limit fried food. Use healthy oils when cooking.

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?

Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.

Did you know?

Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

Universe Universe
True Forget-Me-Not True Forget-Me-Not
Foamy Structure of the Universe Foamy Structure of the Universe
Which of the following statements is true of linkage? Which of the following statements is true of linkage?
Get feedback every 5 to 7 minutes about heat intensity. Add or subtract heat barriers to maintain ... Get feedback every 5 to 7 minutes about heat intensity. Add or subtract heat barriers to maintain ...
How to convert from radians to degrees, minutes, seconds How to convert from radians to degrees, minutes, seconds
Video: Griffith's experiments

For a complete list of videos, visit our video library