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

Author Question: If someone were to suggest that possibly half of the galaxies in the universe are composed of ... (Read 46 times)

maegan_martin

  • Hero Member
  • *****
  • Posts: 532
on: Jul 27, 2018
If someone were to suggest that possibly half of the galaxies in the universe are composed of antiparticles (anti-galaxies), what argument(s) might you present to refute this hypothesis?
 
  (Remember, atoms made of antiparticles have the same chemical and spectroscopic properties that our ordinary matter has.)

Question 2

The condition for total internal reflection can be predicted from Snell's law since
 
  A) the index of refraction of glass is about 1.5.
  B) the index of refraction of plastic is about 1.5.
  C) the value of tangent can be 1.0.
  D) the maximum value of the sine is 1.0.
  E) the maximum value of the sine is 1.5.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

lorealeza77

  • Sr. Member
  • ****
  • Posts: 356
Reply #1 on: Jul 27, 2018
Answer to Question 1

Astronomers see many galaxies colliding, and if a pair were composed of a galaxy and an antigalaxy, then ENORMOUS high energy radiation would escape (be seen) due to the particle-antiparticle annihilations.

Answer to Question 2

D


maegan_martin

  • Member
  • Posts: 532
Reply 2 on: Jul 27, 2018
YES! Correct, THANKS for helping me on my review

alexanderhamilton

  • Member
  • Posts: 334
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Did you know?

Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.

Did you know?

Atropine, along with scopolamine and hyoscyamine, is found in the Datura stramonium plant, which gives hallucinogenic effects and is also known as locoweed.

Did you know?

Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.

Types of paralysis: (A) Quadriplegia is complete or partial paralysis of the upper extremities and c Types of paralysis: (A) Quadriplegia is complete or partial paralysis of the upper extremities and c
Big Picture of the Evolution of the Universe Big Picture of the Evolution of the Universe
(a) The relative age ranges of different dating techniques depend upon the half-life of the system u (a) The relative age ranges of different dating techniques depend upon the half-life of the system u
Women who are monozygotic twins and have the same genes are more similar in their marital happiness Women who are monozygotic twins and have the same genes are more similar in their marital happiness
The Cs-131 nuclide has a half-life of 30. years. After 139 years, about 3.0 grams remain. The ... The Cs-131 nuclide has a half-life of 30. years. After 139 years, about 3.0 grams remain. The ...
An electrochemical cell is based on these two half-reactions An electrochemical cell is based on these two half-reactions
Video: Adolescent Diabetes

For a complete list of videos, visit our video library