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 5 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
Excellent

bigcheese9

  • Member
  • Posts: 333
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

Did you know?

About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.

Did you know?

Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

Did you know?

Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.

Did you know?

Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

The Scales of the Universe The Scales of the Universe
Inventory of the Universe Inventory of the Universe
Observable Universe Before and After Inflation Observable Universe Before and After Inflation
A recruiting poster for the “True Sons of Freedom” encouraged African Americans to enlist. In fact, A recruiting poster for the “True Sons of Freedom” encouraged African Americans to enlist. In fact,
Diego Rivera, Man, Controller of the Universe. Diego Rivera, Man, Controller 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 ...
Video: Uterine (menstrual) cycle - phases

For a complete list of videos, visit our video library