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 83 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
Gracias!

Chelseyj.hasty

  • Member
  • Posts: 319
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

There are 60,000 miles of blood vessels in every adult human.

Did you know?

Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.

Did you know?

Complications of influenza include: bacterial pneumonia, ear and sinus infections, dehydration, and worsening of chronic conditions such as asthma, congestive heart failure, or diabetes.

Did you know?

Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.

Did you know?

Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.

The Milestones of Adjustment Post-Psychosis model outlines a four-phase trajectory from a psychotic ... The Milestones of Adjustment Post-Psychosis model outlines a four-phase trajectory from a psychotic ...
Creating a Continental Economy Creating a Continental Economy
The relative penetrating power of alpha, beta, and gamma radiation. Gamma and neutron radiation are ... The relative penetrating power of alpha, beta, and gamma radiation. Gamma and neutron radiation are ...
Mitotic Phase: Telophase Mitotic Phase: Telophase
Allelic phase analysis in human families A and B Allelic phase analysis in human families A and B
Creating a loss-of-function CFTR Creating a loss-of-function CFTR
Video: Electromagnetic Spectrum, Chlorophyll and Pigment & Light

For a complete list of videos, visit our video library