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 30 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!

lkanara2

  • Member
  • Posts: 329
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.

Did you know?

Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

Did you know?

According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.

Did you know?

In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

Did you know?

The U.S. Pharmacopeia Medication Errors Reporting Program states that approximately 50% of all medication errors involve insulin.

A true albino squirrel. Note the pink eyes. A true albino squirrel. Note the pink eyes.
True Friendship True Friendship
Possible Geometries of the Universe Possible Geometries of the Universe
Warm-up (5 minutes). Warm up the soft tissues of the feet with a variety of kneading, sliding, and ... Warm-up (5 minutes). Warm up the soft tissues of the feet with a variety of kneading, sliding, and ...
Under ideal conditions, a single cell of the bacterium E. coli would divide every 20 minutes to ... Under ideal conditions, a single cell of the bacterium E. coli would divide every 20 minutes to ...
Video: Leukemia

For a complete list of videos, visit our video library