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 14 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
Gracias!

pratush dev

  • Member
  • Posts: 321
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

The first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.

Did you know?

The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

Did you know?

People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

Did you know?

The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.

Did you know?

Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

A true albino squirrel. Note the pink eyes. A true albino squirrel. Note the pink eyes.
True Friendship True Friendship
Observable Universe Before and After Inflation Observable Universe Before and After Inflation
How to convert from degrees to degrees, minutes, seconds using your Fx-991ES Plus calculator How to convert from degrees to degrees, minutes, seconds using your Fx-991ES Plus calculator
A diagram showing one of Mendel’s crosses. True-breeding strains of pea plants with smooth and ... A diagram showing one of Mendel’s crosses. True-breeding strains of pea plants with smooth and ...
Video: Causes of Angina

For a complete list of videos, visit our video library