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

Author Question: If WIMPs really exist and make up most of the dark matter in galaxies, which of the following is not ... (Read 60 times)

809779

  • Hero Member
  • *****
  • Posts: 579
on: Jul 27, 2018
If WIMPs really exist and make up most of the dark matter in galaxies, which of the following is not one of their characteristics?
 
  A) They travel at speeds close to the speed of light.
  B) They are subatomic particles.
  C) They can neither emit nor absorb light.
  D) They tend to orbit at large distances from the galactic center.

Question 2

For what type of object is the period-luminosity relation used for determining distances?
 
  A) RR Lyrae variables
  B) T Tauri variables
  C) Cepheids
  D) Cataclysmic variables
  E) Planetary nebulae


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

cadimas

  • Sr. Member
  • ****
  • Posts: 362
Reply #1 on: Jul 27, 2018
Answer to Question 1

A

Answer to Question 2

C


809779

  • Hero Member
  • *****
  • Posts: 579
Reply #2 on: Jul 27, 2018
TY


cadimas

  • Sr. Member
  • ****
  • Posts: 362
Reply #3 on: Jul 27, 2018
You're welcome


« previous next »
 

Did you know?

Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

Did you know?

Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.

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?

The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.

Did you know?

There are 20 feet of blood vessels in each square inch of human skin.

The use of bacteria to make human insulin The use of bacteria to make human insulin
White matter White matter
Galaxies Forming by Combining Smaller Units Galaxies Forming by Combining Smaller Units
Gray and White Matter of the Brain Gray and White Matter of the Brain
Biomass can be processed to make vehicle fuels Biomass can be processed to make vehicle fuels
Computer reconstructions of the diversity in neurons that exist across species Computer reconstructions of the diversity in neurons that exist across species
Video: Mycobacterium tuberculosis: Drug Resistance and Natural Selection

For a complete list of videos, visit our video library