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

Author Question: Sgr A is believed to be the center of the Milky Way galaxy because I. it lies in the general ... (Read 89 times)

Zulu123

  • Hero Member
  • *****
  • Posts: 525
on: Jul 27, 2018
Sgr A is believed to be the center of the Milky Way galaxy because I. it lies in the general direction of the center of the galaxy based on observations of globular clusters in the plane of the Milky Way. II. long-wavelength dust-penetrating images show it to be a region crowded with stars. III. orbits of stars around it indicate a mass several million times that of the Sun within a volume a few light hours in size. IV. radio observations show it is a concentrated source at the center of swirling clouds of gas.
 
  a. I & II only
  b. II & III only
  c. I & IV only
  d. II & IV only
  e. All of I, II, III, & IV

Question 2

The average star spends ________ of its lifetime on the main sequence.
 
  a. 1
  b. 2
  c. 10
  d. 20
  e. 90


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

potomatos

  • Sr. Member
  • ****
  • Posts: 338
Reply #1 on: Jul 27, 2018
Answer to Question 1

e

Answer to Question 2

e


Zulu123

  • Hero Member
  • *****
  • Posts: 525
Reply #2 on: Jul 27, 2018
Thank you!


potomatos

  • Sr. Member
  • ****
  • Posts: 338
Reply #3 on: Jul 27, 2018
Always glad to help...


« previous next »
 

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

Did you know?

Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.

Did you know?

Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

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?

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.

The Host Galaxy of a Gamma-Ray Burst The Host Galaxy of a Gamma-Ray Burst
Fossil remains of anatomically modern humans from the Czech Republic and from China (center crania) Fossil remains of anatomically modern humans from the Czech Republic and from China (center crania)
Why did these young volunteers of the First Virginia Militia join the Confederate army in 1861? “It Why did these young volunteers of the First Virginia Militia join the Confederate army in 1861? “It
General Motors, Cadillac Fleetwood. General Motors, Cadillac Fleetwood.
How to prove the derivative of the general logarithmic function How to prove the derivative of the general logarithmic function
Determine the nominal annual rate of interest of the following ordinary general annuity. Determine the nominal annual rate of interest of the following ordinary general annuity.
Video: Lipid digestion - mouth, stomach and small intestine

For a complete list of videos, visit our video library