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

Author Question: Identify a true statement about quasars. A) Their spectra are similar to the spectra of stars. ... (Read 89 times)

joblessjake

  • Hero Member
  • *****
  • Posts: 555
on: Jul 27, 2018
Identify a true statement about quasars.
 
  A) Their spectra are similar to the spectra of stars.
  B) Their spectra do not show any redshift.
  C) They exhibit fluctuations in their brightness over time scales of hours or minutes.
  D) They are supermassive structures with a diameter of 20 to 50 Mpc.

Question 2

The brilliant nuclei of Seyfert galaxies change brightness rapidly, in only a few hours or minutes, especially at _____.
 
  A) microwave wavelengths
  B) visible light wavelengths
  C) gamma ray wavelengths
  D) X-ray wavelengths


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

tashiedavis420

  • Sr. Member
  • ****
  • Posts: 329
Reply #1 on: Jul 27, 2018
Answer to Question 1

C

Answer to Question 2

D


joblessjake

  • Hero Member
  • *****
  • Posts: 555
Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


tashiedavis420

  • Sr. Member
  • ****
  • Posts: 329
Reply #3 on: Jul 27, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Approximately 500,000 babies are born each year in the United States to teenage mothers.

Did you know?

In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.

Did you know?

Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

Did you know?

Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

Did you know?

Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.

Apparent and True Orbits of Alpha Centauri. Apparent and True Orbits of Alpha Centauri.
TrUe....FaLsE TrUe....FaLsE
Classifying the Spectra of Stars Classifying the Spectra of Stars
A GDI system uses a low-pressure pump in the gas tank similar to other types of fuel-injection ... A GDI system uses a low-pressure pump in the gas tank similar to other types of fuel-injection ...
Testing client’s ability to identify sharp sensations Testing client’s ability to identify sharp sensations
Similar Fossils on Different Continents Similar Fossils on Different Continents
Video: Mechanics of Sound Animation

For a complete list of videos, visit our video library