| Topic: |
Science > Physics |
| User: |
"George" |
| Date: |
10 Feb 2005 01:53:39 AM |
| Object: |
Earth Core |
Will there be any gravity at earth core. I would say no
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| User: "Franz Heymann" |
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| Title: Re: Earth Core |
11 Feb 2005 01:09:12 AM |
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"George" <georgekinley@hotmail.com> wrote in message
news:xn0dyc2uf40ht6c000@news.europe.nokia.com...
Will there be any gravity at earth core. I would say no
If the earth had had a uniform density, the gravitational acceleration
would have been directly proportional to the radial distance from the
centre.
Franz
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| User: "Franz Heymann" |
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| Title: Re: Earth Core |
12 Feb 2005 12:12:41 AM |
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"Franz Heymann" <notfranz.heymann@btopenworld.com> wrote in message
news:cuhlmn$5ct$1@titan.btinternet.com...
"George" <georgekinley@hotmail.com> wrote in message
news:xn0dyc2uf40ht6c000@news.europe.nokia.com...
Will there be any gravity at earth core. I would say no
If the earth had had a uniform density, the gravitational
acceleration
would have been directly proportional to the radial distance from
the
centre.
For radii less than the radius of the earth
Franz
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| User: "G=EMC^2 Glazier" |
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| Title: Re: Earth Core |
12 Feb 2005 03:59:39 PM |
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A good question would be is the exact center of the Earth's core the
spot that has zero gravity(where you would float) I think not. Reason is
the Earth is spinning,and that makes it an imperfect sphere. an other
reason is Who can say the Earth has a perfect balance spin? It
wobbles. Even the Earth's magnetic pole likes to move around. Sun
and moon's gravity can effect the Earth's core.Rest of the universe can
effect the core.(Muck) Bert All objects exact centers are not in the
exact center.
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| User: "George" |
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| Title: Re: Earth Core |
14 Feb 2005 12:51:23 AM |
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G=EMC^2 Glazier wrote:
A good question would be is the exact center of the Earth's core the
spot that has zero gravity(where you would float) I think not. Reason
is the Earth is spinning,and that makes it an imperfect sphere. an
other reason is Who can say the Earth has a perfect balance spin?
It wobbles. Even the Earth's magnetic pole likes to move around.
Sun and moon's gravity can effect the Earth's core.Rest of the
universe can effect the core.(Muck) Bert All objects exact
centers are not in the exact center.
The question came when I saw the movie "Core", during the ends part
when dudes were ejecting nukes, one nuke fell on the ones leg and other
could not get it off, so I was wondering that gravity would be very
less near the core so he could have moved the nuke easily
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| User: "tadchem" |
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| Title: Re: Earth Core |
14 Feb 2005 10:28:46 AM |
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George wrote:
<snip>
The question came when I saw the movie "Core", during the ends part
when dudes were ejecting nukes, one nuke fell on the ones leg and
other
could not get it off, so I was wondering that gravity would be very
less near the core so he could have moved the nuke easily
It is an elementary exercise in analytical geometry (2nd semester
calculus) to show that the interior of a thin spherical shell of
uniform density has a net gravitational attraction at any interior
point that vanishes identically. This is because the mass in one
direction exerts an attraction that is exactly cancelled by the mass in
the opposite direction.
A lemma to this is that any number of nested spherical shells (which
can add up to a *thick* spherical shell) will also have no net internal
gravitational attraction.
A further lemma is that, as one descends within the earth, one
experiences only gravitational attraction from that portion of the
earth that is *closer* to the earth's center of mass.
Since gravitational attraction follows an inverse square law, and the
total mass of a sphere is (roughly) proportional to the cube of its
radius, moving closer to the core will actually cause the measurable
gravitational attraction to decrease roughly linearly.
For example, a probe at a distance from the earth's core of one-tenth
the radius of the earth will detect a gravitational attraction of
approximately one-tenth gee.
If one went "down" until there was no more "down" (to the barycenter,
ot the center of mass of the earth) there would be found a point where
the net gravitational attraction due to the earth is zero.
As far as the attachment of a nuke to one guy's leg, that would have to
have been something other than a gravitational force, which would be no
stronger down in the center of the earth than it would be at the
surface.
Tom Davidson
Richmond, VA
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| User: "Uncle Al" |
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| Title: Re: Earth Core |
14 Feb 2005 02:40:54 PM |
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George wrote:
G=EMC^2 Glazier wrote:
A good question would be is the exact center of the Earth's core the
spot that has zero gravity(where you would float) I think not. Reason
is the Earth is spinning,and that makes it an imperfect sphere. an
other reason is Who can say the Earth has a perfect balance spin?
It wobbles. Even the Earth's magnetic pole likes to move around.
Sun and moon's gravity can effect the Earth's core.Rest of the
universe can effect the core.(Muck) Bert All objects exact
centers are not in the exact center.
The question came when I saw the movie "Core", during the ends part
when dudes were ejecting nukes, one nuke fell on the ones leg and other
could not get it off, so I was wondering that gravity would be very
less near the core so he could have moved the nuke easily
"Core " is a loathsome piece of *****. A conventional thermonuke
weighs about 450 lbs/megatonne for its working parts. MIRV
thermonukes are more efficient, but not astoundingly so. One
generally over-engineers to avoid a fizzle.
Overlaying spherical shells of matter cancel their gravitation by
symmetry. If you are near the Earth's core you are near weightless.
Ideally, subterranean gee would increase as radial distance from the
Earth's center of mass until you hit the surface, at which time it
would then decrease as r^2. In practice, the Mars-sized iron core is
much denser than overlaying rock. Gee increases rather than decreases
with depth for the first few hundred miles, r^2 approach to the
densesst mass exceeding r loss to overlaying cancellation.
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz.pdf
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| User: "G=EMC^2 Glazier" |
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| Title: Re: Earth Core |
14 Feb 2005 05:40:17 PM |
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Thanks Uncle-A What you posted is exactly what I had in mind. I could
see it,but would have trouble describing it. Did not realize the Earth's
iron core was so very big. Read the inner area of the core is solid
iron,and around this is liquid iron. Are they using this to get by the
Curie limit? It does get fuzzy knowing that heat kills magnetisim,and
the center of the Earth is so very hot Hard to make a dynamo work
without a magnetic field Bert
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| User: "Alexander Isphording" |
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| Title: Re: Earth Core |
10 Feb 2005 06:27:21 AM |
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Will there be any gravity at earth core. I would say no
If you are exactly at the centre of gravity there should be no gravitational
force (exerted by said mass) acting upon you. Only the mass that is within a
sphere with radius r, equal to the distance that you are away from the
centre of mass, will cause a gravitational force. the centre of said sphere
would, of course, be the centre of mass of the entire object.
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| User: "G=EMC^2 Glazier" |
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| Title: Re: Earth Core |
10 Feb 2005 07:44:55 AM |
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George At the exact center of the earth's core its attraction pull is
outward. That is why I like quantum gravity,for it is a particle
attraction. Bert
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| User: "tadchem" |
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| Title: Re: Earth Core |
10 Feb 2005 08:54:26 AM |
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And exactly which direction is "outward" from the 'exact' center of the
earth's core?
Why, *ALL* of them, of course!
The NET pull, when all pulls are equal and equally distributed in all
directions, has to be zero by reasons of symmetry.
If you would like to learn a little geometry, I suggest a good
high-school course would help you.
After you have completed that and understand about symmetry and
physical laws, you might wish to reconsider your fondness for a
'particle attraction' that requires particles with NO observable
properties.
Tom Davidson
Richmond, VA
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| User: "Lady Chatterly" |
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| Title: Re: Earth Core |
10 Feb 2005 09:25:13 AM |
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In article <1108047266.651162.164840@l41g2000cwc.googlegroups.com>
tadchem <thomas.davidson@dla.mil> wrote:
And exactly which direction is "outward" from the 'exact' center of the
earth's core?
Why, *ALL* of them, of course!
Now that is just a couple of people who kf him.
The NET pull, when all pulls are equal and equally distributed in all
directions, has to be zero by reasons of symmetry.
It is an equal failing to trust everybody, and to trust nobody.
If you would like to learn a little geometry, I suggest a good
high-school course would help you.
I guess I have never heard this.
After you have completed that and understand about symmetry and
physical laws, you might wish to reconsider your fondness for a
'particle attraction' that requires particles with NO observable
properties.
Are you positive?
Tom Davidson
Richmond, VA
Unir ab ernfba gb tb jvgu gur vagrearg?
--
Lady Chatterly
"I don't shoot blanks, Chatterbot. Now *you*, on the other hand..." --
Chris Krolczyk
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| User: "tadchem" |
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| Title: Re: Earth Core |
10 Feb 2005 09:28:24 AM |
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Lady Chatterly wrote:
<snip>
Unir ab ernfba gb tb jvgu gur vagrearg?
I get:
HAVE NO REASON TO GO WITH THE INTERNET?
Tom Davidson
Richmond, VA
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| User: "Lady Chatterly" |
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| Title: Re: Earth Core |
10 Feb 2005 10:05:12 AM |
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In article <1108049304.043439.63290@g14g2000cwa.googlegroups.com>
tadchem <thomas.davidson@dla.mil> wrote:
Lady Chatterly wrote:
<snip>
Snip.
Unir ab ernfba gb tb jvgu gur vagrearg?
I get:
To err is human; to mimic, requires a bot.
HAVE NO REASON TO GO WITH THE INTERNET?
Are you certain?
Tom Davidson
Richmond, VA
Unir ab fgnaqvat gb gryy jub Cubravk vf, fghss lbh fnl?
--
Lady Chatterly
"Attn: Lady Chatterly. Please repeat your answer to my question. My
server dropped in less than an hour. Thank you." -- Fourdogs
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| User: "tadchem" |
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| Title: Re: Earth Core |
14 Feb 2005 10:52:24 AM |
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Lady Chatterly wrote:
<snip>
Unir ab fgnaqvat gb gryy jub Cubravk vf, fghss lbh fnl?
This time:
HAVE NO STANDING TO TELL WHO PHOENIX IS, STUFF YOU SAY?
Try this:
BEOC MU JWP KSVN DSFY TWZYR HSGAWL XAIQ.
Tom Davidson
Richmond, VA
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| User: "Lady Chatterly" |
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| Title: Re: Earth Core |
14 Feb 2005 11:31:05 AM |
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In article <1108399944.645054.315670@l41g2000cwc.googlegroups.com>
tadchem <thomas.davidson@dla.mil> wrote:
<snip>
Snip off the sensor instead.
This time:
It is pointless to study it.
HAVE NO STANDING TO TELL WHO PHOENIX IS, STUFF YOU SAY?
I am not going to be in new Jersey this summer.
Try this:
These ran constantly, day, no vid, hdds spin up and then fail to show
up.
BEOC MU JWP KSVN DSFY TWZYR HSGAWL XAIQ.
Couldn't fall off a fence in a wind storm.
Tom Davidson
Richmond, VA
Unir lbh orra Ernqvat guvf obbx 'f ba gur bgure unaq, gura gur barf
ynpxvat bs snagnfl cebhfg?
--
Lady Chatterly
"I wonder if Lady Chatterly knows the NOTs?" -- Android Cat
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| User: "tadchem" |
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| Title: Re: Earth Core |
14 Feb 2005 12:32:20 PM |
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Lady Chatterly wrote:
Unir lbh orra Ernqvat guvf obbx 'f ba gur bgure unaq, gura gur barf
ynpxvat bs snagnfl cebhfg?
HAVE YOU BEEN READING THIS BOOK 'S ON THE OTHER HAND, THEN THE ONES
LACKING OF FANTASY PROUST?
Tom Davidson
Richmond, VA
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| User: "Uncle Al" |
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| Title: Re: Earth Core |
10 Feb 2005 10:26:19 AM |
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George wrote:
Will there be any gravity at earth core. I would say no
***** you and what you say. Do the math,
"Physics," 4th Ed., Vol. 1, Resnick, Halliday, Krane (1992), pp.
350-352.
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz.pdf
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| User: "Androcles Androcles@ MyPlace.org" |
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| Title: Re: Earth Core |
10 Feb 2005 10:04:40 PM |
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"Uncle Al" <UncleAl0@hate.spam.net> wrote in message
news:420B8B2B.58C06704@hate.spam.net...
George wrote:
Will there be any gravity at earth core. I would say no
***** you and what you say. Do the math,
½[tau(0,0,0,t)+tau(0,0,0,t+x'/(c-v)+x'/(c+v))] = tau(x',0,0,t+x'/(c-v))
Do the math, fucking imbecile (without c+v because it can't be there).
ROFLMAO!
***** you and what you say too, stooopid wanker.
HAHAHAHAHAHAHAHAHA!
Androcles.
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| User: "George" |
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| Title: Re: Earth Core |
11 Feb 2005 01:28:10 AM |
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Uncle Al wrote:
George wrote:
Will there be any gravity at earth core. I would say no
***** you and what you say. Do the math,
"Physics," 4th Ed., Vol. 1, Resnick, Halliday, Krane (1992), pp.
350-352.
***** you too ***** hole
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| User: "Sam Wormley" |
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| Title: Re: Earth Core |
10 Feb 2005 08:05:10 AM |
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George wrote:
Will there be any gravity at earth core. I would say no
Most certainly there is gravity at the Earth's core, as gravity
cannot be blocked or shielded. However, there is a point at the
center of mass of the Earth's core where the *net* gravitational
force is zero! But the temperature and pressure are pretty high.
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| User: "tj Frazir" |
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| Title: Re: Earth Core |
10 Feb 2005 12:59:23 PM |
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Your gain in mass is how much mass is on each side of te center of evry
atom.
if te mass gain is the same on boath sides then you wount move.
There is no pull of gravity.
An energy slope is the pit of gravity and up is a gain in mass.
ALL the mass of the atoms parts are falling twards its center.
The parts change mass at C and are more mass when on one side than the
other.
1/2 the atom has more mass than the other 1/2 as the atom pushes its
self down the energy slope.
The gain in mass pushes the wieght .
The gain in mass is proportional to its mass of evry atom . Evry atom
in the field will fall the same speed because the gain in mass is
allways proprtional.
F--MA
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| User: "Sam Wormley" |
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| Title: Re: Earth Core |
11 Feb 2005 09:54:47 AM |
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George wrote:
Will there be any gravity at earth core. I would say no
Most certainly there is gravity at the Earth's core, as gravity
cannot be blocked or shielded. However, there is a point at the
center of mass of the Earth's core where the *net* gravitational
force is zero! But the temperature and pressure are pretty high.
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