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

Author Question: A nearby galaxy has a radius of 4,000 million A.U. and rotates once every 800 million years. What is ... (Read 78 times)

silviawilliams41

  • Hero Member
  • *****
  • Posts: 560
on: Jul 27, 2018
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
Reply #1 on: Jul 27, 2018
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


silviawilliams41

  • Hero Member
  • *****
  • Posts: 560
Reply #2 on: Jul 27, 2018
TY


InfiniteSteez

  • Sr. Member
  • ****
  • Posts: 340
Reply #3 on: Jul 27, 2018
You're welcome


« previous next »
 

Did you know?

Children with strabismus (crossed eyes) can be treated. They are not able to outgrow this condition on their own, but with help, it can be more easily corrected at a younger age. It is important for infants to have eye examinations as early as possible in their development and then another at age 2 years.

Did you know?

It is difficult to obtain enough calcium without consuming milk or other dairy foods.

Did you know?

Medication errors are more common among seriously ill patients than with those with minor conditions.

Did you know?

Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

Did you know?

Human kidneys will clean about 1 million gallons of blood in an average lifetime.

Comparison of the radius of fruits produced by native and introduced species of Sapindaceae Comparison of the radius of fruits produced by native and introduced species of Sapindaceae
Results from sequential study of two cohorts tested at three ages and at three different points in t Results from sequential study of two cohorts tested at three ages and at three different points in t
Pangaea 200 Million Years Ago Pangaea 200 Million Years Ago
Planet Z-34 has a mass equal to 1/3 that of Earth, a radius equal to 1/3 that of Earth, and an ... Planet Z-34 has a mass equal to 1/3 that of Earth, a radius equal to 1/3 that of Earth, and an ...
A mortgage loan of $132,000 at 6% compounded semiannually is to be amortized over 25 years by ... A mortgage loan of $132,000 at 6% compounded semiannually is to be amortized over 25 years by ...
Earth 600 Million Years Ago Earth 600 Million Years Ago
Video: Peptide Bond Formation Animation

For a complete list of videos, visit our video library