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 84 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
Gracias!

pangili4

  • Member
  • Posts: 346
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Did you know?

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

Did you know?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

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.

The niche of Spartina anglica is related to tidal fluctuations. The niche of Spartina anglica is related to tidal fluctuations.
Bay (left) and chestnut (sometimes called "sorrel") are two of the most common coat colors Bay (left) and chestnut (sometimes called "sorrel") are two of the most common coat colors
Angioplasty. One form is called balloon angioplasty, shown here. A balloon catheter is threaded into Angioplasty. One form is called balloon angioplasty, shown here. A balloon catheter is threaded into
Cardiac catheterization. Insertion of a tube called a catheter through a blood vessel. In this examp Cardiac catheterization. Insertion of a tube called a catheter through a blood vessel. In this examp
Theory of Mind Theory of Mind
The illusory bands visible in this figure are often called Mach bands, although Mach used a ... The illusory bands visible in this figure are often called Mach bands, although Mach used a ...
Video: DNA Replication Factory and Protein

For a complete list of videos, visit our video library