× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
6
o
5
5
b
4
s
3
j
3
b
3
m
3
K
3
g
3
L
3
w
3
Home Q & A Board Science-Related Homework Help Physics Astronomy
New Topic  
anja@phs.ae anja@phs.ae
wrote...
Go to Answer
Posts: 480
Rep: 0 0
6 years ago
The density of the Universe is
 
  a. equal to the critical density if the Universe is closed.
  b. equal to the critical density if the Universe is flat.
  c. greater than the critical density if the Universe is flat.
  d. greater than the critical density if the Universe is open.
  e. None of the other choices are correct.

Question 2

If white dwarfs have exhausted their fuel, why are they hot?
 
  What will be an ideal response?

Question 3

Current evidence suggests that the Universe is
 
  a. flat, infinite, and neither expanding nor contracting.
  b. closed, finite, and slowing its expansion.
  c. open, infinite, and slowing in its expansion.
  d. static with no expansion.
  e. flat, infinite, and accelerating in its expansion.

Question 4

If the Sun and stars are supported by gas pressure, what supports a white dwarf?
 
  What will be an ideal response?
Read 71 times
2 Replies
Replies
Answer verified by a subject expert
beunique90beunique90
wrote...
#1
Top Poster
Posts: 539
Rep: 1 0
6 years ago
Sign in or Sign up in seconds to unlock everything for free
This verified answer contains over 200 words.
1

Related Topics

anja@phs.ae Author
wrote...
#2
6 years ago
I'm still confused, but thanks for answering correctly
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1079 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 462
  
 277
  
 814