This topic contains a solution. Click here to go to the answer

Author Question: According to the Big Bang theory, why do we live in a universe that is made of almost entirely of ... (Read 88 times)

big1devin

  • Hero Member
  • *****
  • Posts: 583
According to the Big Bang theory, why do we live in a universe that is made of almost entirely of matter rather than antimatter?
 
  A) During the first 0.001 second after the Big Bang, particles and antiparticles were made in almost but not perfectly equal numbers. Everything annihilated except the very slight excess of matter particles.
  B) GUT theories predict that under the conditions that prevailed in the early universe, the normal laws of physics would have been suspended so that only matter particles were created, and no particles of antimatter.
  C) Einstein's famous equation E = mc2 tells us that energy can turn into matter, but does not tell us that it can turn into antimatter.
  D) The fact that we live in a universe made of matter is not surprising, because antimatter has never been shown to exist for real.

Question 2

A star is seen to have two transiting planets. Planet 1 transits every 3 months, and Planet 2 transits every 15 months. What can we infer about their orbits?
 
  A) Planet 2's semimajor axis is larger than Planet 1's.
  B) Planet 1's orbit is more eccentric than Planet 2's.
  C) Planet 2's orbit is more eccentric than Planet 1's.
  D) Planet 1's semimajor axis is larger than Planet 2's.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

IRincones

  • Sr. Member
  • ****
  • Posts: 321
Answer to Question 1

A

Answer to Question 2

A




big1devin

  • Member
  • Posts: 583
Reply 2 on: Jul 27, 2018
Excellent


  • Member
  • Posts:
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

 

Did you know?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

Did you know?

Bisphosphonates were first developed in the nineteenth century. They were first investigated for use in disorders of bone metabolism in the 1960s. They are now used clinically for the treatment of osteoporosis, Paget's disease, bone metastasis, multiple myeloma, and other conditions that feature bone fragility.

Did you know?

Always store hazardous household chemicals in their original containers out of reach of children. These include bleach, paint, strippers and products containing turpentine, garden chemicals, oven cleaners, fondue fuels, nail polish, and nail polish remover.

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?

For high blood pressure (hypertension), a new class of drug, called a vasopeptidase blocker (inhibitor), has been developed. It decreases blood pressure by simultaneously dilating the peripheral arteries and increasing the body's loss of salt.

For a complete list of videos, visit our video library