What is the size of a Black hole?
  Home FAQ Contact Sign in
alt.philosophy only
 
Advanced search
POPULAR GROUPS

more...

alt.philosophy Profile…
 Up
What is the size of a Black hole?         


Author: Sanny
Date: Jan 5, 2008 07:21

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
20 Comments
Re: What is the size of a Black hole?         


Date: Jan 5, 2008 07:23

"Sanny" hotmail.com> wrote in message
news:01461db0-4292-43d1-aa1c-eb25f14920ba@d21g2000prf.googlegroups.com...
| 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 ...
Show full article (0.89Kb)
no comments
Re: What is the size of a Black hole?         


Author: thinker
Date: Jan 5, 2008 07:48

"Sanny" hotmail.com> wrote in message
news:01461db0-4292-43d1-aa1c-eb25f14920ba@d21g2000prf.googlegroups.com...
> 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 ...
Show full article (1.16Kb)
no comments
Re: What is the size of a Black hole?         


Author: N:dlzc D:aol T:com (dlzc)
Date: Jan 5, 2008 09:32

Dear Sanny:

"Sanny" hotmail.com> wrote in message
news:01461db0-4292-43d1-aa1c-eb25f14920ba@d21g2000prf.googlegroups.com...
> 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.
Show full article (2.00Kb)
no comments
Re: What is the size of a Black hole?         


Author: Sanny
Date: Jan 5, 2008 09:53

>> 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?
Show full article (1.32Kb)
no comments
Re: What is the size of a Black hole?         


Author: N:dlzc D:aol T:com (dlzc)
Date: Jan 5, 2008 10:09

Dear Sanny:

"Sanny" hotmail.com> wrote in message
news:694090fa-0b6a-4ace-9ae6-d35390a6a919@p69g2000hsa.googlegroups.com...
>>> 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."
Show full article (2.58Kb)
no comments
Re: What is the size of a Black hole?         


Author: Jim Black
Date: Jan 5, 2008 11:50

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.
Show full article (2.39Kb)
no comments
Re: What is the size of a Black hole?         


Author: Sue...
Date: Jan 5, 2008 13:28

On Jan 5, 10:21 am, Sanny hotmail.com> 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
Show full article (1.07Kb)
no comments
Re: What is the size of a Black hole?         


Author: Sue...
Date: Jan 5, 2008 13:51

On Jan 5, 1:09 pm, "N:dlzc D:aol T:com \(dlzc\)" cox.net>
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.
Show full article (1.45Kb)
no comments
Re: What is the size of a Black hole?         


Author: Immortalist
Date: Jan 5, 2008 18:51

On Jan 5, 10:09 am, "N:dlzc D:aol T:com \(dlzc\)" cox.net>
wrote:
> Dear Sanny:
>
> "Sanny" hotmail.com> wrote in message
>
> news:694090fa-0b6a-4ace-9ae6-d35390a6a919@p69g2000hsa.googlegroups.com...
>
>>>> 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. ...
Show full article (4.16Kb)
no comments

RELATED THREADS
SubjectArticles qty Group
BH Many sizes and 'Size = Spin Speed3 alt.astronomy ·
1 2 3