Naked Science Forum
Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: mrfinger6 on 29/12/2005 01:29:11
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Is it possable that gravity is a push and not a pull?
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No
Learn, create, test and tell
evolution rules in all things
God says so!
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Could such a quantum-string particle (graviton) and its interactions and movements result in quantum-like vaccumm states? We do find other quantum particles capable of "pulling" other particles together.
DocN
"Imagination is more important than knowledge..." Einstein
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what is anti-gravity then because i would have thought that it was a type of gravity that pushes. Can't anti-gravity somehow be used to open up tiny wormholes in the foam of space time or something. Would appreciate any help on this topic.
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Anti gravity is theoretical but some believe possible,
Dark matter could be formed from baryonic matter which your made from or non baryonic matter like neutrinos, wimps, super wimps, gravitinos neutralinos, axions, photinos, to name a few. So who knows what’s possible.
Remember lots of things begin there lives as theoretical.
Michael (https://www.thenakedscientists.com/forum/proxy.php?request=http%3A%2F%2Fi11.photobucket.com%2Falbums%2Fa186%2Fukmicky%2Fwallbash.gif&hash=7fbfae96ee4eb666ba3ec22832e5a81f)
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quote:
Originally posted by ukmicky
Anti gravity is theoretical but some believe possible,
Most forces that have opposites, like repels like and opposites attract. Since, with ordinary gravity, like attracts like, then are you suggesting it would be a reversal of the ordinary convention, and one would have a repulsion of opposites (and by inference, matter with anti-gravity would attract other matter that has anti-gravity).
Also, if anti-gravity does exist, and if it repels matter that has a gravitational field, it could be quite troublesome getting down to Earth against the force of the Earth's gravitational field (ofcourse, that may be the reason we don't readily find it on Earth at present).
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I wonder if a state of spacetime opposite to that of a blackhole, could exist--that is the repellent condition of matter?
DocN
Imagination is more important than knowedge...Einstein
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It is interesting to consider the possibility that if one considers gravitational energy as "negative energy" and therefore, inorder to produce an anti-gravity state, could a quantum vacuum output a form of negative energy?
Doc
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quote:
Originally posted by DocN
I wonder if a state of spacetime opposite to that of a blackhole, could exist--that is the repellent condition of matter?
Try doing a google search on "white holes".
(It'll give you links like the following...)
http://curious.astro.cornell.edu/question.php?number=108
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If the fact that matter and energy cannot be created or destroyed is true then where does the energy for gravitaional pull come from?
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Good question, i'm guessing. I presume it comes from the fabric of space itself, as even an empty vacuum is supposed to contain energy.
Best wait for a clever person to anwser though[:)]
Michael HAPPY NEW YEAR (https://www.thenakedscientists.com/forum/proxy.php?request=http%3A%2F%2Fi11.photobucket.com%2Falbums%2Fa186%2Fukmicky%2Fparty-smiley-012.gif&hash=844994fd61764508c533537d6874634d)
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The creation of the gravitational field does not require any continuos expending of energy only the existence of a chunk of mass energy that is creating the gravitational field. if another body (assumed to be of insignificant mass with respect to the main attracting body) moves into an area where the value of the gravitational field is significant enough for attractive motion to become significant the energy of the object in the field is deemed to be potential energy as the motion of the body falls down the poential well bthe field generates. As the body accelerates it exchanges some of this potential enrtgy into kinetic energy of motion. as the body moved into the vicinity of the field it was clearly moving before this attraction became significant. assimoing that this motion was not initially directly towards the attracting object the object also posessed some angular momentum with respect to the main atteacting object this angular momentum qwill be conserved and the smaller body will perform a hyperbolic orbit around the main object and decelerate giving up kinetic energy and gainig potrential energy with respect to the main attracting body as it moves away never to return
Learn, create, test and tell
evolution rules in all things
God says so!
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As i said best wait for a clever person, i knew one would come along
But just out of interest what is this
zero point energy and vacuum energy, are they the same and what are they.
Michael HAPPY NEW YEAR (https://www.thenakedscientists.com/forum/proxy.php?request=http%3A%2F%2Fi11.photobucket.com%2Falbums%2Fa186%2Fukmicky%2Fparty-smiley-012.gif&hash=844994fd61764508c533537d6874634d)
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Does Einstein's analogy of a person accelerating in an elevator being identical to a person standing in a gravtiational field show that when we are in a gravitational feild and are still relative to the large mass then we are constantly moving through space at an ever accelerating speed. If space is dragged into a large body then where does it go?
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The person accelerating in an elevator (blacked out), is in outerspace away from any large, attracting mass but would be unaware of the situation and still believe that a "force" of gravity was in force because of some mass. If in a falling (blacked out) elevator near a large mass, the person would believe that gravity was not in force since if he or she dropped say a book, it would appear to "float". To Einstein, there is no force of gravity--just the curvature of spacetime because of mass.
Doc