Author Question: Supermassive black holes are believed to be located at the center of many galaxies because a. the ... (Read 84 times)

lunatika

  • Hero Member
  • *****
  • Posts: 548
Supermassive black holes are believed to be located at the center of many galaxies because
 
  a. the rotation curve of the galaxy indicates that 90 of the galaxy is dark matter.
  b. the orbital motion of material near the center is very fast and indicates a very massive core.
  c. the shape of the bulge in all spiral galaxies can only be supported by a supermassive black hole.
  d. the spiral structure requires a black hole to maintain the spiral arms.
  e. the orbital speeds of a globular clusters in the galaxy are greater than the speed of light.

Question 2

YSOs are in hydrostatic equilibrium.
 
  a. True
  b. False
  Indicate whether the statement is true or false



mohan

  • Sr. Member
  • ****
  • Posts: 362
Answer to Question 1

b

Answer to Question 2

False



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

mohan

  • Sr. Member
  • ****
  • Posts: 362

 

Did you know?

The familiar sounds of your heart are made by the heart's valves as they open and close.

Did you know?

Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.

Did you know?

Every flu season is different, and even healthy people can get extremely sick from the flu, as well as spread it to others. The flu season can begin as early as October and last as late as May. Every person over six months of age should get an annual flu vaccine. The vaccine cannot cause you to get influenza, but in some seasons, may not be completely able to prevent you from acquiring influenza due to changes in causative viruses. The viruses in the flu shot are killed—there is no way they can give you the flu. Minor side effects include soreness, redness, or swelling where the shot was given. It is possible to develop a slight fever, and body aches, but these are simply signs that the body is responding to the vaccine and making itself ready to fight off the influenza virus should you come in contact with it.

Did you know?

There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.

Did you know?

Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.

For a complete list of videos, visit our video library