This topic contains a solution. Click here to go to the answer

Author Question: A nearby galaxy has a radius of 4,000 million A.U. and rotates once every 800 million years. What is ... (Read 63 times)

silviawilliams41

  • Hero Member
  • *****
  • Posts: 560
A nearby galaxy has a radius of 4,000 million A.U. and rotates once every 800 million years. What is its mass in solar masses?
 
  What will be an ideal response?

Question 2

Where on Earth would you be if Polaris were directly overhead?
 
  A) North Pole
  B) Arctic Circle
  C) Tropic of Cancer
  D) Equator
  E) It lies overhead everywhere on Earth.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

InfiniteSteez

  • Sr. Member
  • ****
  • Posts: 340
Answer to Question 1

Using Kepler's third law, P2 = a3/(M + m), and using solar system units of years, AUs, and solar masses, the sum of the masses must be M + m = 1011 solar masses. The sum of the masses, in this case represents the total mass of the galaxy.

Answer to Question 2

A





 

Did you know?

Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

Did you know?

After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

Did you know?

Blastomycosis is often misdiagnosed, resulting in tragic outcomes. It is caused by a fungus living in moist soil, in wooded areas of the United States and Canada. If inhaled, the fungus can cause mild breathing problems that may worsen and cause serious illness and even death.

Did you know?

In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.

Did you know?

Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.

For a complete list of videos, visit our video library