« previous next »

Author Question: The cosmic microwave background radiation was emitted during a time when ____ was the important ... (Read 74 times)

sjones

  • Hero Member
  • *****
  • Posts: 520
on: Jul 27, 2018
The cosmic microwave background radiation was emitted during a time when ____ was the important process in the Universe.
 
  a. recombination
 b. ionization
 c. fusion
 d. antiproton production
  e. positron production

Question 2

Consider the complete magnetic cycle of sunspot activity on the Sun. Approximately how many years is this cycle?
 
  a. 100 years
  b. 11 years
 c. 7 years
 d. 40 years
 e. 22 years


tuwy

  • Sr. Member
  • ****
  • Posts: 336
Reply #1 on: Jul 27, 2018
Answer to Question 1

a

Answer to Question 2

e


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

sjones

  • Hero Member
  • *****
  • Posts: 520
Reply #2 on: Jul 27, 2018
Thanks


tuwy

  • Sr. Member
  • ****
  • Posts: 336
Reply #3 on: Jul 27, 2018
Welcome :)


« previous next »
 

Did you know?

There are more sensory neurons in the tongue than in any other part of the body.

Did you know?

Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

Did you know?

Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.

Did you know?

Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

Did you know?

Alcohol acts as a diuretic. Eight ounces of water is needed to metabolize just 1 ounce of alcohol.

Bronfenbrenner’s model of the ecological-systems approach to studying development. He suggested that Bronfenbrenner’s model of the ecological-systems approach to studying development. He suggested that
It's important to take all your antibiotics It's important to take all your antibiotics
Time Estimates for Specific Office Procedures Cont. Time Estimates for Specific Office Procedures Cont.
The time spent in each interval of one complete cell cycle of a human cell in culture The time spent in each interval of one complete cell cycle of a human cell in culture
A mother invests $9000 in a bank account at the time of her daughter's birth. The interest is ... A mother invests $9000 in a bank account at the time of her daughter's birth. The interest is ...
Surtsey, a volcanic island, during the time of its formation. Surtsey, a volcanic island, during the time of its formation.
Video: Stages of Mitosis - Prophase, Prometaphase, Metaphase, Anaphase & Telophase

For a complete list of videos, visit our video library