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 125 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
Wow, this really help

jackie

  • Member
  • Posts: 324
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

Did you know?

The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

Did you know?

Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.

Did you know?

It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.

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
Arthroscopic surgery. In this illustration, the knee joint is undergoing surgery with a specialized Arthroscopic surgery. In this illustration, the knee joint is undergoing surgery with a specialized
Descartes’ Theory Descartes’ Theory
Kneeling on one knee to keep good alignment when massaging the arms and hands. Kneeling on one knee to keep good alignment when massaging the arms and hands.
quantum mechanics quantum mechanics
Different forms of a gene are called alleles Different forms of a gene are called alleles
Video: Atrial natriuretic peptide (vasodilation) & Aldosterone

For a complete list of videos, visit our video library