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

Author Question: The most prominent theory about spiral arms is called the _____. A) spiral quantum fluctuations ... (Read 110 times)

Metfan725

  • Hero Member
  • *****
  • Posts: 552
on: Jul 27, 2018
The most prominent theory about spiral arms is called the _____.
 
  A) spiral quantum fluctuations
  B) spiral gravitational collapse
  C) spiral density wave theory
  D) spiral radiation theory

Question 2

To find the age of a cluster, astronomers must know:
 
  A) the distance to the cluster.
  B) the number of stars in the cluster.
  C) the iron content of all the stars in the cluster.
  D) the orbital motion of all the stars in the cluster.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Jayson

  • Sr. Member
  • ****
  • Posts: 350
Reply #1 on: Jul 27, 2018
Answer to Question 1

C

Answer to Question 2

A


Metfan725

  • Member
  • Posts: 552
Reply 2 on: Jul 27, 2018
Great answer, keep it coming :)

dantucker

  • Member
  • Posts: 346
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.

Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

Did you know?

Most strokes are caused when blood clots move to a blood vessel in the brain and block blood flow to that area. Thrombolytic therapy can be used to dissolve the clot quickly. If given within 3 hours of the first stroke symptoms, this therapy can help limit stroke damage and disability.

Did you know?

No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.

Did you know?

There are 20 feet of blood vessels in each square inch of human skin.

Does this child have legs of different lengths or scoliosis? Look at the level of the iliac crests a Does this child have legs of different lengths or scoliosis? Look at the level of the iliac crests a
Spiral Galaxies Seen Nearly Edge On from the Milky Way Spiral Galaxies Seen Nearly Edge On from the Milky Way
Swanson’s Theory of Caring Swanson’s Theory of Caring
Lie prone with your head turned to one side. Put your arms out to your sides and bend your elbows at ... Lie prone with your head turned to one side. Put your arms out to your sides and bend your elbows at ...
The clonal selection theory of the adaptive immune response The clonal selection theory of the adaptive immune response
A square matrix P is called a permutation matrix if each row and column of P contains exactly ... A square matrix P is called a permutation matrix if each row and column of P contains exactly ...
Video: Stages of Mitosis - Prophase, Prometaphase, Metaphase, Anaphase & Telophase

For a complete list of videos, visit our video library