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

Author Question: The energy source at the center of our galaxy is called a. Cygnus X-1. b. the Orion arm. c. the ... (Read 35 times)

frankwu

  • Hero Member
  • *****
  • Posts: 549
on: Jul 27, 2018
The energy source at the center of our galaxy is called
 
  a. Cygnus X-1.
  b. the Orion arm.
  c. the Sun.
  d. Sagittarius A.

Question 2

There is a main-sequence mass-luminosity relation because
 
  a. helium fusion produces carbon.
  b. stars expand when they become giants.
  c. more massive stars support their larger weight by making more energy.
  d. the helium flash occurs in degenerate matter.
  e. all stars on the main sequence have about the same radius.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

sierramartinez

  • Sr. Member
  • ****
  • Posts: 313
Reply #1 on: Jul 27, 2018
Answer to Question 1

.D

Answer to Question 2

c


frankwu

  • Member
  • Posts: 549
Reply 2 on: Jul 27, 2018
Gracias!

carojassy25

  • Member
  • Posts: 299
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

For high blood pressure (hypertension), a new class of drug, called a vasopeptidase blocker (inhibitor), has been developed. It decreases blood pressure by simultaneously dilating the peripheral arteries and increasing the body's loss of salt.

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

There are actually 60 minerals, 16 vitamins, 12 essential amino acids, and three essential fatty acids that your body needs every day.

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?

Thyroid conditions may make getting pregnant impossible.

Diagrams showing the multiple energy shells and orbitals of a nitrogen atom Diagrams showing the multiple energy shells and orbitals of a nitrogen atom
Bipolar disease. The term bipolar means “pertaining to two poles.” The individual with this form of Bipolar disease. The term bipolar means “pertaining to two poles.” The individual with this form of
The Orion Nebula The Orion Nebula
The receptive fields of an on-center cell and an off-center cell. The receptive fields of an on-center cell and an off-center cell.
Energy in China Energy in China
Comparing uncontrolled and controlled energy release. Comparing uncontrolled and controlled energy release.
Video: Acid-base imbalances - compensation of respiratory acidosis and alkalosis

For a complete list of videos, visit our video library