Top Posters
Since Sunday
a
5
k
5
c
5
B
5
l
5
C
4
s
4
a
4
t
4
i
4
r
4
r
4
Home Q & A Board Science-Related Homework Help Physics
New Topic  
staedtler staedtler
wrote...
Go to Answer
Posts: 2716
Rep: 0 0
7 years ago
What is the most probable mechanism for the initial triggering and subsequent maintenance of the density wave that forms the visible arms in spiral galaxies?

(a)   Gravitational interaction from close passage of other galaxies.
(b)   Shock waves from supernova explosions of massive stars within the spiral arms.
(c)   The gravitational influence from the rotating central supermassive black hole at the galactic center upon the arm material.
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
Authors:
Read 185 times
2 Replies
Replies
Answer verified by a subject expert
papachulopapachulo
wrote...
#1
Top Poster
Posts: 1302
Rep: 29 0
7 years ago
Sign in or Sign up in seconds to unlock everything for free
More solutions for this book are available here
1

Related Topics

staedtler Author
wrote...
#2
6 years ago
On behalf of my study group and I, thank you
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1104 People Browsing
 101 Signed Up Today
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 42
  
 4427
  
 223
Your Opinion
Who will win the 2024 president election?
Votes: 3
Closes: November 4
Previous poll results: Does a gender wage gap exist in America?