Top Posters
Since Sunday
s
3
v
3
p
3
m
2
s
2
d
2
N
2
d
2
e
2
s
2
s
2
e
2
Home Q & A Board Science-Related Homework Help Physics
New Topic  
killian killian
wrote...
Go to Answer
Silver Member
Posts: 6024
Rep: 33 0
10 years ago
Over time, what is the net effect of the star-gas-star cycle in the Milky Way?
A) The total mass in the galaxy's interstellar medium is gradually increased, and the new gas is continually enriched in heavy elements.
B) The total mass in the galaxy's interstellar medium is gradually reduced, and the remaining gas is continually enriched in heavy elements.
C) The temperature of the interstellar medium varies between the cool 10-50 degrees (Kelvin) required to form stars and the 2000-30,000 degree (Kelvin) temperatures of the outer layers of the stars that form. But over time, more and more of the interstellar medium remains cool.
D) The gas of the interstellar medium is continually depleted in elements heavier than helium.
E) There is no net effect to the cycle. Mass in the interstellar medium lost to star formation is exactly replaced by stellar winds and supernova explosions.
Read 1030 times
2 Replies
Smiling Face with Open Mouth
Replies
Answer accepted by topic starter
padrepadre
wrote...
#1
Staff Member
Educator
Top Poster
Posts: 21610
Rep: 4541 17
10 years ago
Sign in or Sign up in seconds to unlock everything for free
MingMing42
Mastering in Nutritional Biology
Tralalalala Slight Smile

Related Topics

wrote...
#2
10 years ago
Thanks Padre
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  973 People Browsing
 161 Signed Up Today
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 4501
  
 299
  
 342
Your Opinion
What percentage of nature vs. nurture dictates human intelligence?
Votes: 436
Previous poll results: How often do you eat-out per week?