Physics

I seem to have found a contradiction about magnetars in Wikipedia. It says that a magnetar is a neutron star. The description of a neutron star says they contain only neutrons. However, the description of a magnetar says it contains protons. Additionally, is a magnetar and the space around it (if filled with electrons) anything like a super massive atom? Since I have not seen such a description, perhaps electrons around a magnetar are not in orbitals? If not, why have they not been pulled into the magnetar and made the magnetar charge zero? Maybe the electrons are in an accretion disk, and eventually they will fall into the magnetar, except the magnetic fields might …

So anybody got any more info on this than I can get off wiki or facebook?

Let's say that we eventually progress to the point where we are able to (somehow) produce huge amounts of antimatter, at least by today's standards, and we build an interstellar spacecraft to travel to Proxima Centauri. Let's say that using antimatter propulsion, along with several other propulsion types, we are able to propel the spacecraft up to a significant percent of the speed of light, say 50%. If I'm not mistaken, at those speeds it would take approximately 9 years for the ship to travel to Alpha Centauri from the point of view of those left on Earth, and ~2.5 years from the perspective of those inside the ship travelling at 50% the speed of light due to the time d…

A friend of mine was telling me about his research and that with it a larger version of his prototype could be built to power electrical devices including cars and trains via wireless power transmission and efficaciously. The transmission system has 98% quantum efficiency (not sure what that means, but it sounds good). To all who've studied optics or more so applied optics/photonics, is this feasible or an exaggeration of the capabilities of wireless power transmission?

Looking back through time So we all know that some the stars we can see on earth, as we see them, are as they were hundreds of millions of years ago due to the fact that light only travels so fast. So, hypothetically, if someone were to make a mirror and Send it out into space a hundred light years from earth. In two hundred years, would someone be able to see through that mirror and look at the earth as it is right now? could they see individual people and watch them?

can any body tell me the difference between higgs-boson partical and the patical was found in CERN?because i can't understand from the net.and what is the characterestics of this two partical?

hello I want mcnp monte carlo simulation software AND EGSnrc But I can not find it The two beams are simulated. Please give a link to download

Hi everybody, The question I wanted to clarify is the following: does the black hole interact with any other objects in the space via the eloctromagnetic force? There are two contradictory clues I have on my mind. First of all, the overall electric charges is conserved during any kind of transformations of a substance. So, the evident answer is yes, there are electromagnetic intercations with the black holes and, say, the travelling protons. Secondly, the electromagnetic interaction is a field, which is both a particle and a wave. A particle, associated with the electromagentic field is a photon. But a photon cannot escape the black hole event horizon. So,…

I want to make something physic defying, or rather looks as though it does.

Wikipedia tends to complicate things and after reading a lot of articles on Wikipedia I became totally confused. So could you please tell me the difference between physics, astronomy and cosmology? Also what is the difference between astronomy, astrophysics and physical cosmology?

So a friend of mine and me were speculating about black holes. He theorized that black holes led to a 4th dimension. From that i started to question what black holes really are and how they "work". So heres my question: From what i have learned my whole life, black holes form from stars or other masses that have so much mass and gravity at 1 point that they cave in on themselves and create a hole that will suck in everything around it which will never be seen again including light. Could it be similar to taking a piece of paper, laying it out straight in mid air, and pushing a pencil in the top until the paper bends down further and further and eventually rips mak…

"The Equation Breaks Down" I remember hearing this statement in a physics documentary some time ago. I presume it to mean that an equation which gives valid or verifiable predictions within a certain range, once that range is exceeded, produces incorrect statements or values (for example Newtonian Physics cannot describe activity on a quantum level, therefore its mathematical predictions would "break down"). That an equation should "break down" on one level but remain true on another would seem to mean that the equation is not in fact true or absolute. I would like to know any other current mathematical examples in Physics where equations appear to collapse or produce…

how you explain plasma exactly??

Apparently the photo-electric effect is used as a means to help prove that light exibits characteristics of particles. Wouldn't it make more sense that waves cause this effect? If a wave is merely a disturbance to the electromagnetic field, then based upon how strong the wave is determines if the electrons get knocked off right? Consider the field as a type of material, and a certain strength makes it feel more or less abbrassive (also explaining the more coarse appearance of the "photon clusters"), this would suggest it is not particles causing it, but that it is actually waves. Let me know how I am wrong, if I am.

I need help writing part of a screenplay I'm working on, physics-wise. In ACT 1 the main character's father is killed during a hoverbike race. Here are the contributing factors, if any or all of them would contribute to his death: -He's travelling at about 350 km/h (219 mph). -He's 62 years old, weighs about 195 lbs, fairly muscular build for his age. -His racing suit consists of body armor an inch thick (on his chest and legs). -His bike explodes while he's still on it. How would these factors kill him?

is he really that influential?.... is he really the pre-eminent string theorist how do other top notch theorists like sylvester gates, nathan seiberg, and juan maldacena etc.etc. compare to him

there are three types of Matter they are 1 solid 2 liquid 3 gas My question is solids and liquids are getting attracted towards gravitational force but why gases are not getting attracted towards gravitational force... Plz help me

In Gamespot several posters brought up the idea that our reality could be a computer simulation. Personally I think this idea is interesting and could maybe be related to general relativity, quantum gravity, loop qunatum gravity, superstring theory and M-theory. I mean what the hell is consciousness and how do we even know that there is a world outside from what we sense and percieve. Are we even experiencing the whole of reality or only what our mind and it's limited capacity can make sense of? http://www.gamespot.com/forums/topic/29381943/have-you-ever-wondered-if-reality-is-a-simulation

would anyone be interested in a desk top free demo down load of a model simulator ? I have a link for this. i played with it, it's interesting and amusing. STK SEET http://www.agi.com/products/stk/modules/de...spx/id/stk-seet STK Space Environment and Effects Tool (SEET) is designed for use by spacecraft designers, analysts and operators to evaluate the effects of the space environment on their spacecraft. Developed by AGI Business Partner Atmospheric and Environmental Research, Inc. (AER), SEET provides comprehensive modeling of the near-Earth space environment and its expected impacts on a space vehicle. SEET calculates spacecraft exposure to i…

ÉTIENNE KLEIN: "TIME ZERO" Was there ever a beginning to the Universe? [WATCH THIS VIDEO CONFERENCE ON YOUTUBE, click here: http://www.youtube.com/embed/SD7L-jgd8xc] GiovedìScienza, Thursday February the 28th, 2013 5.45 pm. Colosseo Theatre, Turin, Italy. Étienne Klein Research Director at CEA, Commissariat à l'énergie atomique et aux énergies alternatives (Atomic Energy and Alternative Energies Commission) In cooperation with Italy’s French Embassy TIME ZERO Was there ever a beginning to the Universe? For over a century we have been aware of an expanding universe: galaxies grow apart at very high speed a little like the shards after an explosion. Since 1998 we have a…

Are there any reactions that allow aneutronic fission? I remember vaguely reading about the possibility in Omni magazine many years ago but I forget the details.

why is the 'rest mass' of any photon=0

in the equation,g'=g<1-[2h/R]>;WHY CAN'T h=infinity

Japanese electricity producers had bought MOx ("mixture of oxides"), a nuclear fuel that mixes less-enriched uranium with plutonium resulting from the reprocessing of spent nuclear fuel. After the Fukushima disaster, especially as people realized that the higher reactivity of MOx to fast neutrons would let it behave differently if water evaporated from the spent fuel pool #4, and maybe as the Japanese gouvernment understood that other countries could just steal the shipment, the old Japanese government asked to stop all shipments of MOx. These days, Areva wants to ship MOx again to Japan. If we were to believe newspapers, Japanese electricity producers have no use for…

Since seawater has significant thermal inertia, would it be possible to create a floating platform, which uses the difference between air temperature and seawater temperature to generate electricity? The generator could be solid state (Seebeck effect), a Stirling engine, or a gas turbine. One would have to reverse the generator for nighttime operation when the seawater is hotter than the air. How would one go about calculating the maximum possible power generation given a temperature difference and the area, which it touches on both the hot and the cold side? Solid state generators seem to have an efficiency of about 5%, Stirling engines 15% - 30%, and gas tur…