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What is the size of a Black hole?



 
 
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  #1  
Old January 5th 08 posted to sci.physics, alt.philosophy, alt.astronomy, sci.physics.relativity
Sanny
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Posts: 385
Default What is the size of a Black hole?

Is a Black hole as big as Sun. Or it is as small as a Moon. Or just
the size of a FootBall.

Does a Black hole has a mass. And does it also have gravity. And Is it
as hot as Sun or very cool.

I heard Gravity is because a few elementary particle muon/photon
(Gravitons) are exchanged between mass. In that case how these
gravitons are able to go outside the Black hole? As I heard Black
holes even Light can not escape from it.

What are Gravitons and do they travel at speed of Light. What is the
mass & charge of Graviton? If a Mass gives out Graviton then I think
slowly it should loose Mass. Does every particle having mass gives out
Gravitons???

Bye
Sanny

Play Chess at: http://www.GetClub.com/Chess.html
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  #2  
Old January 5th 08 posted to sci.physics,alt.philosophy,alt.astronomy,sci.physics.relativity
Androcles[_5_]
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Posts: 248
Default What is the size of a Black hole?


"Sanny" wrote in message
...
| Is a Black hole as big as Sun. Or it is as small as a Moon. Or just
| the size of a FootBall.
|
| Does a Black hole has a mass. And does it also have gravity. And Is it
| as hot as Sun or very cool.
|
| I heard Gravity is because a few elementary particle muon/photon
| (Gravitons) are exchanged between mass. In that case how these
| gravitons are able to go outside the Black hole? As I heard Black
| holes even Light can not escape from it.
|
| What are Gravitons and do they travel at speed of Light. What is the
| mass & charge of Graviton? If a Mass gives out Graviton then I think
| slowly it should loose Mass. Does every particle having mass gives out
| Gravitons???
|
| Bye
| Sanny

Black Hole is big as Bright Green Flying Elephant.
Bye
Androcles



  #3  
Old January 5th 08 posted to sci.physics,alt.philosophy,alt.astronomy,sci.physics.relativity
thinker
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Posts: 5
Default What is the size of a Black hole?


"Sanny" wrote in message
...
Is a Black hole as big as Sun. Or it is as small as a Moon. Or just
the size of a FootBall.

Does a Black hole has a mass. And does it also have gravity. And Is it
as hot as Sun or very cool.

I heard Gravity is because a few elementary particle muon/photon
(Gravitons) are exchanged between mass. In that case how these
gravitons are able to go outside the Black hole? As I heard Black
holes even Light can not escape from it.

What are Gravitons and do they travel at speed of Light. What is the
mass & charge of Graviton? If a Mass gives out Graviton then I think
slowly it should loose Mass. Does every particle having mass gives out
Gravitons???

Bye
Sanny

Play Chess at: http://www.GetClub.com/Chess.html


Black holes can come in different sizes depending on the conditions that
resulted in their formation (particularly its mass when it was a big star).
There is work right now to create mini-black holes in large hadron
colliders.

http://www.csmonitor.com/2003/0523/p25s02-stss.html


  #4  
Old January 5th 08 posted to sci.physics,alt.philosophy,alt.astronomy,sci.physics.relativity
N:dlzc D:aol T:com \(dlzc\)[_692_]
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Posts: 1
Default What is the size of a Black hole?

Dear Sanny:

"Sanny" wrote in message
...
Is a Black hole as big as Sun. Or it is as small as a
Moon. Or just the size of a FootBall.


It depends on the mass it has. If the Earth were compressed into
a black hole, it would be about an inch in diameter. And 6300+
km away, it still would yield a "gravitational acceleration" of
9.81 m/sec^2.

Does a Black hole has a mass. And does it also have
gravity. And Is it as hot as Sun or very cool.


Yes it has mass, and the mass produces gravitation. The mass
establishes the black hole's temperature. More mass = cooler.
The earth-mass black hole above is still barely above absolute
zero (still accepting mass from CMBR radiation). A toaster-mass
black hole would be much hotter, evaporating ina short time.

I heard Gravity is because a few elementary particle
muon/photon (Gravitons) are exchanged between mass.
In that case how these gravitons are able to go outside
the Black hole? As I heard Black holes even Light can
not escape from it.


Gravitons are "virtual exchange particles". Just like the
"virtual photons" that produce the effect we call charge, they
travel at all possible speeds (no c limit), and all possible
paths. See gravitons are part of quantum mechanics, and are
blind to either distance or time.

What are Gravitons and do they travel at speed of Light.


Both faster and slower.

What is the mass & charge of Graviton?


Mass is expected to be very large last I heard. Charge is zero.

If a Mass gives out Graviton then I think slowly it should
loose Mass. Does every particle having mass gives out
Gravitons???


"Exchange" is they key word here. What it gives out, it gets
back.

Now for some links that you could read...

http://en.wikipedia.org/wiki/Black_hole
http://en.wikipedia.org/wiki/Hawking_radiation (temperature)
http://en.wikipedia.org/wiki/Graviton

David A. Smith


  #5  
Old January 5th 08 posted to sci.physics, alt.philosophy, alt.astronomy, sci.physics.relativity
Sanny
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Posts: 385
Default What is the size of a Black hole?

What is the mass & charge of Graviton?

Mass is expected to be very large last I heard. *Charge is zero.


In that case Say there is a Particle smaller than an electron. And it
gives out a Graviton, So Graviton must be lighter than electron mass.

So Lightest particle X Then it exchanges a graviton. In case it is
throwing out a graviton Its mass must be greater than Graviton. Else
we will violate "Conservation of Mass Principle."

And I do not understand What is the shape of Graviton. How it is
exchanged? Incase it is exchanged how that creates an attraction?

Gravitons are "virtual exchange particles". Just like the
"virtual photons" that produce the effect we call charge, they
travel at all possible speeds (no c limit), and all possible
paths. See gravitons are part of quantum mechanics, and are
blind to either distance or time.


Say 2 Mass are 1 lightyear apart how much time it will take for the
gravitons to reach from one mass to other. Do each mass throws
Graviton in all Direction?

Say an electron is throwing Graviton in all directions. At what time
interval these gravitons will be thrown? And if an electron is
throwing 1000s of gravitons in each direction how will "Conservation
of Mass Principle." Mantained?

Bye
Sanny

Play Chess at: http://www.GetClub.com/Chess.html
  #6  
Old January 5th 08 posted to sci.physics,alt.philosophy,alt.astronomy,sci.physics.relativity
N:dlzc D:aol T:com \(dlzc\)[_693_]
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Posts: 1
Default What is the size of a Black hole?

Dear Sanny:

"Sanny" wrote in message
...
What is the mass & charge of Graviton?


Mass is expected to be very large last I heard.
Charge is zero.


In that case Say there is a Particle smaller than
an electron.


Electrons are point particles. Nothing smaller. But you mean
"less massive". Neutrinos are much less massive.

And it gives out a Graviton, So Graviton must
be lighter than electron mass.


Actually I believe the graviton mass is larger than the mass of
most molecules.

So Lightest particle X Then it exchanges a
graviton. In case it is throwing out a graviton Its
mass must be greater than Graviton. Else
we will violate "Conservation of Mass Principle."


Conservation of mass has been discredited. Since it is an
exchange, it occurs in essentially zero time, and the world at
large is none the wiser.

And I do not understand What is the shape of
Graviton.


It is shaped like a unicorn, since it is only theoretical, and
has never been observed. Do not strain at this, it is a waste of
your time.

How it is exchanged? In case it is exchanged
how that creates an attraction?


What do you mean "how is it exchanged"? It was invented to be
"that which can merge continuous spacetime with the quantum
realm". That it *is* exchanged is a given, because we can see
gravitation at work all around us.

Gravitons are "virtual exchange particles".
Just like the "virtual photons" that produce the
effect we call charge, they travel at all possible
speeds (no c limit), and all possible paths. See
gravitons are part of quantum mechanics, and
are blind to either distance or time.


Say 2 Mass are 1 lightyear apart how much
time it will take for the gravitons to reach from
one mass to other. Do each mass throws
Graviton in all Direction?


Zero time, just as in GR.
No, exchange particles have unique, known source-destination.

Say an electron is throwing Graviton in all
directions. At what time interval these
gravitons will be thrown?


Not thrown in all "directions", thrown to all members of the
Universe. Thrown continuously.

And if an electron is throwing 1000s of gravitons
in each direction how will "Conservation of Mass
Principle." Mantained?


"Conservation of mass" is not a law.
Exchange is "round trip".

This is not worth you straining over, unless you want to learn
the underlying physics. Did you read the links I posted before?

David A. Smith


  #7  
Old January 5th 08 posted to sci.physics,alt.philosophy,alt.astronomy,sci.physics.relativity
Jim Black[_2_]
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Posts: 195
Default What is the size of a Black hole?

On Sat, 5 Jan 2008 07:21:26 -0800 (PST), Sanny wrote:

Is a Black hole as big as Sun. Or it is as small as a Moon. Or just
the size of a FootBall.


The Schwarzschild radius r of a black hole is given by

r = 2GM/c^2

where G is Newton's gravitational constant 6.67 * 10^-11 m^3 / (s^2 * kg),
M is the mass of the black hole, and c is the speed of light, 3 * 10^8 m/s.
Look up some masses and plug them in. This isn't really the distance to
the center of the black hole, which is not well defined, but 2 pi r and
4 pi r^2 give you the circumference and surface area of the black hole.

Does a Black hole has a mass. And does it also have gravity. And Is it
as hot as Sun or very cool.


They have mass and gravity. Matter falling into a black hole will get much
hotter than the sun, but if a black hole had nothing falling into it, the
only radiation coming out would be Hawking radiation, which is extremely
faint for typical-sized black holes, and therefore extremely cool.

I heard Gravity is because a few elementary particle muon/photon
(Gravitons) are exchanged between mass.


Gravitons are not muons or photons. They are a hypothetical new
undiscovered particle.

In that case how these
gravitons are able to go outside the Black hole? As I heard Black
holes even Light can not escape from it.


See the FAQ:
http://math.ucr.edu/home/baez/physic...k_gravity.html

What are Gravitons and do they travel at speed of Light. What is the
mass & charge of Graviton?


If they exist, gravitons have zero mass, zero charge, and spin 2. Because
they have zero mass, the gravitons in gravitational waves travel at the
speed of light. But the gravity that holds you to your chair would be a
quantum-mechanical effect, and there if you want to look at things in terms
of the trajectory of the exchanged particle, you'd have to do a sum over
all trajectories, including ones not at the speed of light.

If a Mass gives out Graviton then I think
slowly it should loose Mass.


Not if the gravitons exchanged transferred momentum but no energy.

Does every particle having mass gives out
Gravitons???


Even particles without mass can absorb and emit gravitons.

--
Jim E. Black (domain in headers)
How to filter out stupid arguments in 40tude Dialog:
!markread,ignore From "Name" +"email address"
[X] Watch/Ignore works on subthreads
  #8  
Old January 5th 08 posted to sci.physics, alt.philosophy, alt.astronomy, sci.physics.relativity
Sue...
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Posts: 9,274
Default What is the size of a Black hole?

On Jan 5, 10:21*am, Sanny wrote:
Is a Black hole as big as Sun. Or it is as small as a Moon. Or just
the size of a FootBall.

Does a Black hole has a mass. And does it also have gravity. And Is it
as hot as Sun or very cool.

I heard Gravity is because a few elementary particle muon/photon
(Gravitons) are exchanged between mass. In that case how these
gravitons are able to go outside the Black hole? As I heard Black
holes even Light can not escape from it.

What are Gravitons and do they travel at speed of Light. What is the
mass & charge of Graviton? If a Mass gives out Graviton then I think
slowly it should loose Mass. Does every particle having mass gives out
Gravitons???


Local Photon and Graviton Mass and its Consequences
http://arxiv.org/abs/gr-qc/0603032v2

Search for Frame-Dragging in the Vicinity of Spinning Superconductors
http://arxiv.org/abs/arXiv:0707.3806v4

http://en.wikipedia.org/wiki/Martin_Tajmar

Sue...



Bye
Sanny

Play Chess at:http://www.GetClub.com/Chess.html


  #9  
Old January 5th 08 posted to sci.physics, alt.philosophy, alt.astronomy, sci.physics.relativity
Sue...
external usenet poster
 
Posts: 9,274
Default What is the size of a Black hole?

On Jan 5, 1:09*pm, "N:dlzc D:aol T:com \(dlzc\)"
wrote:
[...]

Conservation of mass has been discredited. *Since it is an
exchange, it occurs in essentially zero time, and the world at
large is none the wiser.


The close analogy between the Principle of General
Covariance and Gauge invariance, allows us to investigate
the gravitoelectromagnetic properties of quantum materials
in the framework of massive gravitoelectromagnetic Proca
equations. We find that the breaking of the PGC in
superconductors leads to a gravitomagnetic London moment
and an associated additional gravito-magnetic term in the
Cooper pairs canonical momentum, which can explain
the anomalous excess of mass of Cooper pairs reported
by Tate. The breaking of the PGC in superconductors
implies the non-equivalence between a rigid reference
frame made with superconductive walls (super-conductive
cavity), being uniformly accelerated in a gravitational
field free region.

(28)
(29)

and a classical rigid reference frame (made with normal
matter) in a similar situation.

(30)

However breaking the principle of general covariance
leads to a violation of the law of conservation of
energy-momentum. It is not clear yet if this would
be a sign for some manifestation of dark energy in
superconductive materials.
However it worths further investigation.
--Clovis de Matos
http://arxiv.org/abs/gr-qc/0607004

Sue...


[...]


  #10  
Old January 6th 08 posted to sci.physics,alt.philosophy,alt.astronomy,sci.physics.relativity
Cosmik de Bris
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Posts: 43
Default What is the size of a Black hole?

N:dlzc D:aol T:com (dlzc) wrote:
Dear Sanny:

"Sanny" wrote in message
...
What is the mass & charge of Graviton?
Mass is expected to be very large last I heard.
Charge is zero.


In that case Say there is a Particle smaller than
an electron.


Electrons are point particles. Nothing smaller. But you mean
"less massive". Neutrinos are much less massive.

And it gives out a Graviton, So Graviton must
be lighter than electron mass.


Actually I believe the graviton mass is larger than the mass of
most molecules.


If Gravitons have mass doesn't that imply that gravity doesn't appear as
1/r^2 force? I thought the range was inversely proportional to mass.

--
Posted via a free Usenet account from http://www.teranews.com

 




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