« previous next »

Author Question: In a uniformly expanding universe, which statement best describes the situation as viewed from an ... (Read 61 times)

abarnes

  • Hero Member
  • *****
  • Posts: 556
on: Jul 27, 2018
In a uniformly expanding universe, which statement best describes the situation as viewed from an observer in Galaxy C (not the Milky Way Galaxy)?
 
  A) Galaxy C observer sees some galaxies moving away, some moving towards itself.
  B) Galaxy C observer sees all galaxies moving away from the Milky Way Galaxy.
  C) Galaxy C observer sees all other galaxies moving away from itself.

Question 2

If we know the average separation and period of revolution for a binary system, we can then measure
 
  A) the actual luminosity of each star.
  B) the actual mass of both individual stars.
  C) their absolute magnitudes.
  D) the actual sizes of the two stars.
  E) the total mass of the system.


katkat_flores

  • Sr. Member
  • ****
  • Posts: 328
Reply #1 on: Jul 27, 2018
Answer to Question 1

C

Answer to Question 2

E


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

Did you know?

In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.

Did you know?

There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

Did you know?

A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.

Did you know?

According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

Inventory of the Universe Inventory of the Universe
Foamy Structure of the Universe Foamy Structure of the Universe
The Expanding Chocolate Chip Cake Analogy The Expanding Chocolate Chip Cake Analogy
Measuring Attachment Styles: The Strange Situation Experiment Measuring Attachment Styles: The Strange Situation Experiment
Diego Rivera, Man, Controller of the Universe. Diego Rivera, Man, Controller of the Universe.
(a) A metaphase array of chromosomes as viewed in the microscope. (b) The computer-derived karyotype (a) A metaphase array of chromosomes as viewed in the microscope. (b) The computer-derived karyotype
Video: Humerus Adduction Animation

For a complete list of videos, visit our video library