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Gravity is Bunk!!!

DaN K. StAnLeY said:
AH HAAA!! That I can imagine! Okay so the magnets have a force keeping them together even while spinning. We know they are powered by the magnets energy.
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Oh dear ...

Don't assume what we know before you learn it. And you won't learn that magnets stick together because of their energy. They do it because of their magnetism.

Now Im curious.
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Beats being a curiosity.

If the magnets are holding together because of their "energy" and this energy opposes the rotation, What do I determine is the cause of gravity on earth. What is the source of the gravitational pull? Does it come from the center of the earth as I would imagine?
(this question is hard to word for me to word properly, sorry)
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Oh dear ...

Energy doesn't oppose things, it just is. Forces can be in opposition, and often are, but energy is entirely neutral.

"Energy" is a much-abused word these days. Find out what it really means, scientifically, and you'll be on the road to understanding.
 
Why so many threads about the falsity of gravity lately? I'm begninning to feel suspicious.
 
TellyKNeasuss said:
The gravitationalists conveniently ignore this paper

http://www.thehumanist.org/humanist/schempp.html

which points out that gravity is a theory, not a fact. Scientists feel compelled to not voice opposition to the theory out of fear that their papers won't get published.
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Heavy.

Doncha hate The Man :cool:? I hear there's a resistance movement coming together in Queensland, Australia, with this samizdat publication thing going on and everything. That's where scientists with cojones go these days, a base from which they can speak truth to power. Were I thirty years younger I'd be out there now, working for the cause.
 
If Gravity does not explain all the phenomena it should, then what theory does? And please since all of us are not brilliant scientists, please try and explain it in a way that can be understood by us mere mortals ;)

If GR's explanation is correct, how does that translate into gravity being a force and not spatial-geometry (as in GR) being spread across all these "branes" as in M-Theory? Is M-theory correct? Or is it wrong?


BTW: Why are there two high-tides in a day?
 
INRM said:
If Gravity does not explain all the phenomena it should, then what theory does?
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Those theories that do explain all the phaenomena they should.

And please since all of us are not brilliant scientists, please try and explain it in a way that can be understood by us mere mortals ;)
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You posed a question, which I've answered. What is it you want to be explained? "It" is terribly imprecise.
 
DaN K. StAnLeY said:
We know they are powered by the magnets energy.
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It would take energy to pull them apart, yes.

Now Im curious. If the magnets are holding together because of their "energy" and this energy opposes the rotation, What do I determine is the cause of gravity on earth. What is the source of the gravitational pull? Does it come from the center of the earth as I would imagine?
(this question is hard to word for me to word properly, sorry)
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Every bit of mass in the earth contributes to its gravity. However if we approximate the earth as spherical (which is pretty close to correct), all those bits add up to the same force you'd get if all the mass were concentrated at the center.

So yes, the "source" is at the center.
 
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sol invictus said:
Every bit of mass in the earth contributes to its gravity. However if we approximate the earth as spherical (which is pretty close to correct), all those bits add up to the same force you'd get if all the mass were concentrated at the center.

So yes, the "source" is at the center.
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Here's a NASA webpage that graphically depicts the imperfections of gravity as felt on the planet's surface. Gravity would be stronger if we were standing atop iron deposits than oil fields. Pretty groovy!
 
INRM said:
BTW: Why are there two high-tides in a day?
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Because there are two tidal bulges on the Earth from the gravitational interaction with, say, the moon. A high tide occurs when one of these tidal bulges sweeps past your location on the planet.

Are you interested in knowing why there are two tidal bulges instead of one? This is a point which confuses my students quite often.
 
DaN K. StAnLeY said:
What is the source of the gravitational pull? Does it come from the center of the earth as I would imagine?
(this question is hard to word for me to word properly, sorry)
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Maybe a visual would help:

Imagine a string running from every atom on earth pulling you towards it. There are more atoms directly below you so the pull downwards is the strongest.
 
DaN was asking for the source.....not a visual to help explain the effects of gravity.

DaN - no-one really knows what the 'source' of gravity is.....but plenty of people are trying to find out. In the mean time....it's explained as a function of mass.
 
WooWooVooDoo said:
DaN was asking for the source.....not a visual to help explain the effects of gravity.

DaN - no-one really knows what the 'source' of gravity is.....but plenty of people are trying to find out. In the mean time....it's explained as a function of mass.
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He suggested that he was being pulled by the center of the Earth. I just wanted to show that the entire planet has an attractive force.
 
INRM said:
BTW: Why are there two high-tides in a day?
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This is the way that I believe describes it the best:

Separate our world, as it travels around the sun, into two parts: the half that is closest to the sun and the half that is farther away. Now, if they were indeed separate pieces, they would be occupying slightly different orbits, one of them having a radius on the order of 1000 miles larger than the other. Kepler's laws of planetary motion (derivable from Newton's law of gravitation) says that the orbit that is larger will take longer to traverse, both because it is a physically longer circumference and because the time required to make an orbit is directly proportional to that orbit's average radius. So, the two parts of Earth would split apart and go their own ways, if gravity between the two parts didn't hold them together. Fortunately it does, but this effect of the two halves tugging against each other is called tidal force, and it actually does cause the liquid at the surface to try to separate on both sides, piling it up to approximately 6' height against what the earth's gravity requires, which is total flatness at a global radius. To a lesser extent, the actual solid material of earth also moves due to tidal forces. The energy required to do that move is converted to heat by friction within the rocks, and is pulled from the rotational energy of the earth's spin. So, tidal forces have the effect of slowing a satellite's spin (until it reaches equality with rotation and the tides freeze in place, and stop dissipating rotational energy).

Whenever a body approaches a gravity well, it will be attracted, and it will essay an orbit of some kind. The two separate halves of the body (in fact, all the parts of the body) will seek separate orbital paths, thus effecting a stretching force on the body. These tidal forces will tear the body apart if the body dives within a calculated radius (called the Roche limit) of the well. If the gravity well is a black hole, it is physically possible to pass much closer to it than the equivalent sun, for instance, because the equivalent massed black hole is much smaller. The closer the body gets to the black hole, the higher the tidal forces are, and they are not ameliorated simply because you may be in circular, or any other shaped, orbit. Matter that actually enters the event horizon has such huge tidal forces acting on it that it is torn into constituent atoms; no information about the structure of the body can survive, according to theory.

Until now. Maybe. http://news.yahoo.com/s/space/20080515/sc_space/newideacouldsolveblackholeinformationmystery
 
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