When matter and anti-matter annihilate each other, does the gravity remains?
970786
It would seem so.\nMatter/antimatter annihilation (which has been observed many many times both naturally and man made), results in energy, i.e. photons, which, though massless, do have gravitational interactions. That is the point of general relativity (light bends in a gravitational field). It's a long story... 4 years of college majoring in physics and 6 years writing a PhD in high energy physics will clear it all up for you.
442716
I would say NO... at certain point, particles are made of energy, and energy can't be splitted as matter does...
339718
Physicists say they have mass produced antimatter, a crucial first step towards precision studies of its properties that may help solve one of the greatest mysteries of the Universe. \n\nAntihydrogen has been made before, but only a few atoms at a time. \n\nNow, the Cern particle accelerator in Geneva, Switzerland, has produced more than 50,000. \n\nAntimatter is the mirror image of ordinary matter and both should have been created in equal quantities at the birth of the Universe. That everything around is predominantly ordinary matter is therefore a major puzzle. \n\nCern is the European Organisation for Nuclear Research. \n\nIn the latest experiment, researchers used the Cern accelerator to create antiprotons and trapped them in a vacuum chamber. \n\nA radioactive source, meanwhile, was used to create positrons, which were held in a separate trap. The antiprotons were then fed into the pool of positrons, where the two combined to form antihydrogen. \n\nThe antimatter was short-lived being destroyed when it bumped into normal matter. Detectors picked up the unique radiation signatures of antimatter as it was annihilated. \n\nAlso see the Wikipedia article: http://en.wikipedia.org/wiki/Antimatter#Antimatter_production
14731
Photons, gluons, gravitons and Z are neutral and elementary so they are their own anti-particles.\n\nThe W+ and W-, the weak force carriers, are charged and are anti-particles.  W+ and W- can annihilate each other.
81505
It is believed that that since the universe evolved out on 'nothing'.....so every matter has an anti-matter..(since the sum total of all matter and anti-matter is zero in universe)...so chances are there are is another earth (anti-matter of where we are)....and hence the all the people and other things are in pairs......BUT, all these are theories...there are no scientific validations of these.
86810
When you talk of the possibilities of Matter and Anti-Matter...we already have them.\n\nProblem in lies that if you seperate matter and anti-matter and combine them to forn energy, you have to find a way to contain the energy (there is alot from a small cumbustion)  There is the problem.  So my thoughts are not yet ready for warp technology.
89665
Anti-matter colliding with matter is the most powerful mass to energy reaction.  The problem is that we have not yet managed to produce anti-matter in large enough amounts to make it available and "stable" enough to be used safely.
402813
No, I think it'll take too long for them to join together.  They're generally so far apart that the gravitational pull on each other is very very small.  Besides, the universe is constantly expanding, so instead we'll end up in a position where everything is just cold and the density of matter is very small.  That's just one theory, though.
259865
No one knows.  It is believe it formed from photons of light.  However, scientist are not puzzled on how it happened but rather its byproducts, matter and anti-matter.  For every particle, there is an anti-particle.  In theory, if anti-matter comes in contact with matter, it cancels itself out.  Meaning, if anti-matter existed in our Universe, we wouldn't be here.  Our Universe seems to made only of matter.  So where is this anti-matter?  \n\nI read an article that there was some evidence to prove that matter pops into our Universe seemingly out of nowhere.  I wish i could find more information on it but I can't.  Below is an easy to read article.  It's all fascinating stuff and it is written in easy to understand language.  \n\nhttp://www.pbs.org/wnet/hawking/mysteries/html/gleiser-1.html\n\nhttp://www.pbs.org/wnet/hawking/html/
475255
It doesn't. Only when it comes in contact with "regular" matter does it produce energy.\n\nAntimatter functions exactly like "normal" matter except everything is the opposite. When matter and antimatter touch each other, they release an amazing amount of energy (waaay more than nuclear fusion) and a slew of subatomic particles.
1020424
this wiki will help\n\nhttp://en.wikipedia.org/wiki/Anti_Matter\n\nit has been observed in controlled experiments
338341
Anti matter is negative version of matter.To differentiate the matter and antimatter we consider the atomic levels of matter.Our own matter is made with atom of centraly proton of positive charge & charge less neutron called nucleus.And a negative charged electrons revolving around it.But in antimatter nucleus is  negative charged proton(anti proton)& electron of positive charge (anti electron) revolving around it.\nI think that matter and antimatter repell each other,have a negative gravitation.
955030
The dark matter hasn't gone anywhere.  The problem is we can't see it directly because it doesn't or reflect any light (hence the name!).  It is defninitely there, but we don't know what form it takes - is it normal matter that just happens to be really really dark (dark dust, very faint brown dwarfs, isolated black holes)?  Or is it some form of weird, exotic matter that we have yet to discover (I know that sounds far-fetched on the surface, but it actually isn't).\n\nWe suspect that dark matter exists for various reasons.  One is by observing how spiral galaxies rotate.  By watching any object orbit around another (like our Sun or other stars orbiting around the center of our galaxy) we can calculate the mass of the thing being orbitted.  But with all spiral galaxies (and others, too) the mass we calculate is far greater than the mass of all the stuff (stars, gas, dust) that we can see - therefore there must be stuff in our galaxy that we can't see, but that still has a significant gravitational effect.\n\nWe also see galaxies orbiting each other.  Here again, but watching them we can calculate how much mass there is, since mass determines gravity.  If we only had the mass of the visible stuff inside and outside the galaxies, those galaxy clusters should break apart - the gravitational force from all the visible stuff isn't strong enough to hold those clusters together.  But those clusters do stay together, so there must be more dark matter there between the galaxies.\n\nNow you may just be asking yourself "maybe gravity doesn't work the same on the galactic scale as it does here on Earth", which is a question scientists have asked, as well.  But recent evidence suggests that that is not the case - that we really do need dark matter to explain our observations.\n\nIt gets even weirder - we now think there's something called "dark energy" that is causing our Universe to epand at a faster rate, instead of being slowed down by gravity the way we used to expect.\n\nThere are quite a few good books about this stuff written for laymen - just puruse your local book store in the science section.  And if it all seems too confusing, don't worry - it's confusing to the scientists, too!  As I tell my students, if it all seems to make sense, you're not paying attention!
657633
if i interpret your question correctly....i would think you are asking about the possibility of anti-gravity energy or "zero point" energy....well....there have been rumours going round about the ongoing research on such an energy source in laboratories in the States....in fact...it has been rumoured that the Germans were researching on it during the closing stages of WW2...basically physics entails that everything in the universe comes in pairs...like the presence of matter and anti-matter....so if there is a force like gravity...it is believed that anti-gravity should exist too...so for example, if a plane is fitted with an anti-gravity device...it will simply "float" in mid-air as anti-gravity repels the gravitational pull...maybe that's why sightings on UFOs cannot be completely dismissed...mmmmmmm
678337
I think you may be referring to Hawking radiation.\n\nVirtual particles come into being all the time but are annihilated before they can be detected by virtual anti-particles.  But close to a black hole with a very steep gravity well what can happen is that one of the particle-antiparticle pair is sucked into the black hole and the other one escapes.  The mass energy of the particle that escapes is taken from the black hole and the black hole gets a little bit lighter.\n\nBecause it is a process that depends on how steep the gravity well is and because smaller black holes have steeper gravity wells the smaller a black hole is the less time it takes to decay away (so a black hole as heavy as a mountain would take billions of years while one as heavy as a star takes way longer).
1172316
f there were plenty of these, gamma and x-ray astronomers would long since have detected the annihilation 'lines' at 511 kev and 1 Gev of electron-anti- electron, and proton-anti-proton annihilation. This is not seen, so that means that at some time after the Big Bang, any matter and anti-matter managed to segregate itself ( No known way to do this UNLESS matter and anti-matter are affected by gravity in different ways), or that starting from time zero, there has always been an asymmetry in the mater/anti-matter abundance. We know that K mesons decay into more matter than anti-matter end particles, so nature doesn't really treat matter and anti-matter the same way even though these forms are produced in equal numbers during 'pair creation' events. In a previous question I also discussed this.\n\nAs to WHY this is so, so that we only see matter galaxies, we have to say that this is simply the way Nature is. Just as the speed of light is fixed at the particular value it has. No explanations seem possible or likely in the future.
814835
Any matter that falls into the black hole adds to the mass of the black hole.  It just doesn't vanish.