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

Author Question: During one phase of the big bang, gamma ray photons were creating electrons and positrons ... (Read 64 times)

Destiiny22

  • Hero Member
  • *****
  • Posts: 557
on: Jul 27, 2018
During one phase of the big bang, gamma ray photons were creating electrons and positrons (anti-electrons). At this time, the Universe also contained ____.
 
  a. protons and antiprotons
 b. protons and neutrons
 c. neutrons only
 d. no other matter or antimatter
  e. neutral atoms

Question 2

Galileo proposed that the Sun is a rotating sphere after he ____.
 
  a. noted how the Sun rose in the east and set in the west
 b. discovered the parallax of the Sun
 c. timed a full rotation of the Sun's equator
 d. observed sunspots move across the surface of the Sun
 e. measured different spectral lines of emission on different days


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

djpooyouma

  • Sr. Member
  • ****
  • Posts: 325
Reply #1 on: Jul 27, 2018
Answer to Question 1

b

Answer to Question 2

d


Destiiny22

  • Member
  • Posts: 557
Reply 2 on: Jul 27, 2018
:D TYSM

anyusername12131

  • Member
  • Posts: 327
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

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?

Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

Did you know?

An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

Did you know?

In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.

Did you know?

In 1844, Charles Goodyear obtained the first patent for a rubber condom.

This 11-month old girl demonstrates one of the abilites of a child of this age group - creating a to This 11-month old girl demonstrates one of the abilites of a child of this age group - creating a to
Alpha, beta, gamma amino acids Alpha, beta, gamma amino acids
How to plot a sine function containing an amplitude and phase-shift (Question 2 of 3) How to plot a sine function containing an amplitude and phase-shift (Question 2 of 3)
SPE densitometry showing an M spike in the gamma region. SPE densitometry showing an M spike in the gamma region.
Gastric Phase of Digestion: Regulation of Gastric Juice pH and Gastric Motility Gastric Phase of Digestion: Regulation of Gastric Juice pH and Gastric Motility
The horizontal phase shift of the resultant graph is The horizontal phase shift of the resultant graph is
Video: Audiology

For a complete list of videos, visit our video library