Gravitational Conditions: Dust Cloud vs Black Hole

In summary, the conversation discusses the relative gravitational conditions between a dust cloud and a condensed mass at a distance of 20, and the effects of a collapsing star on the surrounding area. The answer is that there would be no effect, as the Schwarzschild solution only considers spherical symmetry and calculates the curvature in the vacuum outside the matter distribution.
  • #1
Austin0
1,160
1
I am sure to those of you who know GR this will be a simplistic question.
I can only hope there will be a simplistic and definitive answer :-)

Assume a dust cloud of radius=5 and a mass =mc
ANother equivalent mass of condenced matter md=mc
with a radius=1
What would be the relative gravitational conditions at a distance r=20 wrt each of these masses?
In general terms without the need for specific quantification.

The same question in another context.
A star collapses to a black hole; Assuming no mass loss in the collapse what would be the gereral effects outside the original precollapse radius or would there be??

Thanks
 
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  • #2
No effect. The Schwarzschild solution does not assume a particular distribution of matter, only spherical symmetry. Then it calculates the curvature in the vacuum outside that distribution of matter.
 
  • #3
DaleSpam said:
No effect. The Schwarzschild solution does not assume a particular distribution of matter, only spherical symmetry. Then it calculates the curvature in the vacuum outside that distribution of matter.
Thanks DaleSpam Couldn't have asked for a simpler or more definitve an answer.
 

FAQ: Gravitational Conditions: Dust Cloud vs Black Hole

1. What is a dust cloud and how does it differ from a black hole?

A dust cloud is a large and diffuse mass of dust particles and other matter, typically found in interstellar space. It is held together by gravity and can eventually form into stars and planets. On the other hand, a black hole is a region of space with such a strong gravitational pull that nothing, not even light, can escape from it. It is formed from the collapse of a massive star and has an infinitely dense singularity at its center.

2. How does the gravitational force differ between a dust cloud and a black hole?

The gravitational force of a dust cloud is relatively weak and can vary depending on the size and density of the cloud. In comparison, the gravitational force of a black hole is incredibly strong and can affect the motion of objects even at great distances. This is due to the immense mass of a black hole being concentrated in a small area, creating a strong gravitational pull.

3. Can a dust cloud turn into a black hole?

No, a dust cloud does not have enough mass to undergo the process of gravitational collapse and become a black hole. To form a black hole, a massive star must collapse under its own weight, compressing its mass into a tiny point of infinite density.

4. How is the gravitational force affected by the size of a black hole?

The gravitational force of a black hole is directly proportional to its mass, meaning that the larger the black hole, the stronger its gravitational pull. However, the strength of the gravitational force also decreases with distance, so the closer an object is to the black hole, the stronger the gravitational force it experiences.

5. How do dust clouds and black holes play a role in the formation of galaxies?

Dust clouds play a crucial role in the formation of galaxies as they are the building blocks for stars and planets. As these dust clouds collapse under their own gravity, they can form into stars, which then cluster together to form galaxies. Black holes also play a role in the evolution of galaxies, as they can merge with other black holes and contribute to the growth and structure of a galaxy over time.

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