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

Author Question: A__________is a type of active galaxy nucleus that is especially variable and has few or no spectral ... (Read 33 times)

nenivikky

  • Hero Member
  • *****
  • Posts: 516
on: Jul 27, 2018
A__________is a type of active galaxy nucleus that is especially variable and has few or no spectral emission lines.
 
  A) blazar
  B) pulsar
  C) quasar
  D) quark

Question 2

In the context of measuring the properties of galaxies, a__________is an object of known brightness that astronomers use to find distance.
 
  A) black hole
  B) white dwarf
  C) standard candle
  D) red giant


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

kardosa007

  • Sr. Member
  • ****
  • Posts: 300
Reply #1 on: Jul 27, 2018
Answer to Question 1

A

Answer to Question 2

C


nenivikky

  • Member
  • Posts: 516
Reply 2 on: Jul 27, 2018
YES! Correct, THANKS for helping me on my review

coreycathey

  • Member
  • Posts: 333
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

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

Did you know?

The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.

Did you know?

Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.

Did you know?

Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

Did you know?

There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

The Type C killer whale The Type C killer whale
Refraction Through Uniform and Variable Thickness Glasses Refraction Through Uniform and Variable Thickness Glasses
Isotopes may be stable or radioactive depending on the arrangement and number of neutrons in the nuc Isotopes may be stable or radioactive depending on the arrangement and number of neutrons in the nuc
A star link-type network where all of the modules are connected together using splice packs. A star link-type network where all of the modules are connected together using splice packs.
A typical fuel pulsator used mostly with roller vane-type pumps to help even out the pulsation in ... A typical fuel pulsator used mostly with roller vane-type pumps to help even out the pulsation in ...
A carbon-14 nucleus decays to a nitrogen-14 nucleus by beta-minus decay. How much energy (in ... A carbon-14 nucleus decays to a nitrogen-14 nucleus by beta-minus decay. How much energy (in ...
Video: DNA close up Animation

For a complete list of videos, visit our video library