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 61 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?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

Did you know?

Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

Did you know?

Addicts to opiates often avoid treatment because they are afraid of withdrawal. Though unpleasant, with proper management, withdrawal is rarely fatal and passes relatively quickly.

Did you know?

Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.

Did you know?

Studies show that systolic blood pressure can be significantly lowered by taking statins. In fact, the higher the patient's baseline blood pressure, the greater the effect of statins on his or her blood pressure.

Natural selection of a population for dark coloration. Natural selection of a population for dark coloration.
Spiral Galaxies Seen Nearly Edge On from the Milky Way Spiral Galaxies Seen Nearly Edge On from the Milky Way
Giant Elliptical Galaxies Giant Elliptical Galaxies
Irregular Galaxies Irregular Galaxies
The location of the variable fuel sensor can vary, depending on the make and model of vehicle, but ... The location of the variable fuel sensor can vary, depending on the make and model of vehicle, but ...
Structural MRIs reveal cortical loss in adolescent patients with schizophrenia. Here dark blue ... Structural MRIs reveal cortical loss in adolescent patients with schizophrenia. Here dark blue ...
Video: Arthroscopy

For a complete list of videos, visit our video library