Modern and Theoretical Physics

I was wondering if susy revolves around any subatomic symmetries for both fermion and boson partners

If the Grand Unification theories, as well as M-Theory and even the basic Standard Model are correct, then it is a direct consequence that the Einstein-proposed (and which has since been confirmed) idea of space-time is true - i.e a 'fabric', encasing all matter, energy and time into a 4 (though, through M-theory research, possibly more..) dimensional plane, of which 3 dimensions are spatial, and the remaining is the vector of time. Though there has been great progress in the attempts to unify the 3 of the 4 fundamental forces of nature (Electromagnetic, Weak Nuclear and Strong Nuclear forces) into this model, Gravity is proving a kneiving force to incorporate. Einstein…

In my opinion and some of my own observation, I have come to a teori that,more dense the earth because of increasing gravity(mass),the smaller in size also the life in it. It base on theory about energy. Bigger gravity means more weight,more weight means more energy,so our body need to reduced the size factor to efficient the energy needed. And another factor is,in molecular base,the weight is influenced by the gravity too...so our molecule also become smaller smaller and smaller....... So if one is searching for ET in another planet, they also need to consider size factor. CMIIW

When the subject of antimatter comes up, one of the things that also comes up is antimatter bombs. Since antimatter annhilates matter to create pure energy, it has the highest energy density than anything else ever could... so maybe a grenade size bomb could have a nuclear size reaction (according to CERN, the 20 or so antimatter atoms they created can power a lightbulb for 1 minute!) 20 atoms! A grenade has like a thousand million trillion quadrillion atoms! That's like powering a city for 5 million years! However, despite this great energy density, its not like nuclear weapons where you could already find this great amount of energy stored in the uranium mines or w…

Let us suppose that we have a known electromagnetic wave-train of finite size propagating in a certain direction. On its way there is a probe charge. This EMW is an external field for the charge. The EMW has a certain energy-momentum (integral over the space). After action on the probe charge the wave continues its way away. In the end we have the energy of the initial wave (displaced somewhere), the kinetic energy of the charge (hopefully it starts moving), and the energy of the radiated EMF. Thus the total energy is not conserved, is it?

Hello everybody! I have some questions regarding nanotechonlogy and nanorobots, it would be great if someone can help. 1. How does the Velev nanorobot work? I know it uses a diode that creates some kind of fluid flux and moves the robot, but can anyone give me more details? 2. Does this model illustrate the Brownian hatchet principle? 3. In the Brownian hatchet models that are based on the periodical change of potential (symmetric-asymmetric), how do they change the potential in practice? 4. Finally, considering a Brownian motion of a particle that has 1000 possible positions, (probability of each position is pi=1/1000), can anyone explain to …

ALARA - Defined as As Low As Reasonably Achievable This is well known law in the field of radiation physics. It is evident that occupational workers in nuclear reactors, fuel reprocessing plants, accelerators etc... shall continue their work in radiation zones. Hence as they cannot avoid radiation exposure to zero level, they have to minimize it. The ALARA principle says the same. The measures required by law to minimize the risk is to practice the TDS principle. ' T ' stands for Time ; ' D ' stands for Distance ; ' S ' stands for Shielding Time ---- Radiation occupational workers shall minimize the exposure time by means of sharing the work between indivi…

I'm currently researching and planning experiments for a transportation method that uses magnetic levitation and a vacuum tunnel. My idea is to build a tunnel with no air inside it and have magnets on the floor and sides of the tunnel. A person goes in the tunnel wearing a space suit with extra metal on it. The person has a container full of compressed gas. When the container is opened, the person will be launched forward due to conservation of momentum. Because he's in a vacuum, there will be no air resistance to slow him down, and he won't fall because of the magnets. Anyways, I have a few questions that I need to know the answer to in order to build on to what I h…

I suppose it is the case that molecular atoms are never without bonds to other atoms in molecules. Nevertheless, it seems to be the case that in forming such a bond, electrons must shift from one configuration around an atom to another. My question is during such a shift, do characteristics of the pre-bond configuration carry over into the behavior of the bond(s) themselves? Also, since the bonds seem to be the result of electron-sharing between atoms, how does the formation and behavior of the bond affect the other electrons that do not "participate" in the bond?

Hi to everibody, I'm a researcher working on mgb2 superconducting tape fabrication with a great passion for theoretical physics. Recently I was reading a textbook about a new way to threat condensed matter systems (with N=1023) in terms of QED who can be useful for my research field but very difficult (for me) to understand. The basic lacuna that this book wish to fill in the analysis of condensed matter systems is the generalized neglect of the electro-dynamical interaction of the elementary systems with the electro-magnetic radiation field A(x,t). Please, excuse me if I don't give you the book title and the author name but I would like to discuss in a situation w…

Is there a reason that the atomic radii of the elements in the halogen column of the periodic table are smaller than most other elements?

I just recently became aware of the following: (ref. http://en.wikipedia....wiki/Quark#Mass ) This new (to me) information certainly blurs the line between what I once thought I could correctly call mass and what I could call energy. I am well aware that these terms are considered by physicists to describe two different aspects of essentially the same thing (E=mc^2). Still, this description of hadrons somehow comes as a surprise to me. So now I have to think of protons and neutrons and, indeed, atomic nuclei as a mixture of nearly 99% binding energy and a little more than 1% "mass". Is this 1% mass irreducible or can it also be converted into an equvalent am…

For people who never heard of this nonsense, This theory is basically saying that there is a tube connecting from north pole to south pole and more advanced people are living there I know it sounds crazy but there are some people seriously believing this and testimonies that they have seen it more info can be found in youtube but...anyways is this physically possible? cause isn't it boiling hot in the middle of the earth?

Today I was reading a book, in which this passage occurs: "Air is made up of molecules, which are themselves made up of groups of atoms. A molecule is almost unbelievably small....to give an example: Take a small box with a capacity of 1 cubic inch, and fill it with ordinary air. If we release 10 million molecules every second, how long will it take for the box to empty itself completely? A second - a minute - a month? No - 50 million years!" This answer - 50 million years - strikes me as not credible. But I don't know how to do the maths to check it! Can anyone do the maths, and prove or disprove it please? Thanks, Dekan

How hot is an electron? How about an atom's nucleous? do photons expand when they get hot? are quarks hot? and are they considered elementry particles? are there subquantum particles or virtual time and distance? is heat an electromagnetic wave similar to light? If a light wave is made up of photons, then what is heat wave made of?

I have been thinking about the topic for several days. When we did some computer simulation in the molecular scale, such as the molecular dynamics , or the monte caro, instead. How can we make sure that what we get from the simulation is the one we need? or, is it right? I think you can get my question, right? I have learned that the statistical mechanics work here, and there is ergodic hypothesis. But I cannot comprehend them well.

this is my current understanding: magnetism is created by the motion of electrons, as the electrons are moving (from one point to another, not vibration) they create these magnetic fields that rotate clockwise if you are looking at the departing electron's 'back', and this motion in a wire creates an electromagnet, and around an atom's nucleus the electrons orbit in the same direction and work together to make the magnetic field in a 'permanent' magnet when most of the magnetized atoms are aligned in the same direction. these are my questions: what is the magnetic field made out of? i' heard something about 'virtual photons' and if they are what transmits the fiel…

Hi, I've discovered the following: If the metal surface is illuminated, some electrons can leave the metal. This phenomenon is called "Photoelectric effect". But the frequency of the radiation must be high enough. To explain this effect Einstein postulated in 1905 the existence of light quanta - photons. Each photon corresponds to the energy E = hv (h is Planck's constant and v - frequency of light). When a photon penetrates into the metal, it could all his energy transferred to an electron. Taking into account the work function W is then the kinetic energy of an ejected electron: Ekin = hv - W. And indeed, there is in this respect a good agreement with experi…

Hi, I have spent several months learning molecualr dynamics simulation. And I think I have got a good result on the bulk material with my own C++ code. But I failed when I tried to do something in the nanoscale. For example, from BaTiO3 bulk to BaTiO3 nanowires, I think the difference between them is 1. the periodic replicas of the wires are separated by vacuum in the radial direction. 2. there are two kind of nanowires, BaO terminated and TiO2 terminated. what's more, the ensemble is NPT, with rescaling constant-voltage method and Berendsen constant-temperature method. then, i found that the size of the radial direction became smaller and smaller. am i wron…

The journal "Nature" invitesto discussion of Leonov's theories – the theory of Superunification. http://www.nature.co...10.1038/471006a TheSuperunification theory is the most powerful analytical means of investigatingmatter. The theory combines the theory of relativity and quantum theory andrepresents a new stage in the development of quantum theory. It has been proventhat the principle of relativity is the fundamental property of quantisedspace-time.

Hi, I am attempting to consider theoretical physics from an artistic point of view, i.e. can processes used in theoretical physics be applicable to art, and if so - how. With the above in mind, I was wondering if someone could help me understand the focus of theoretical physics. As far as I understand it: Theoretical physics applies to general aspects which can be applicable to various instances. Or is it the case that if one can, for example, describe a totally new and independent material/phenomena that it's related laws are applicable only to itself and only in a very particular situation? How limited theoretical physics is to the already known? …

Cold Fission: Helium does not decay into alpha and beta particles like many other atoms such as Uranium 238. Theses alpha particles consist of two protons and two neutrons bound together into a particle identical to the Helium nucleus. Whereas, beta particles are high energy, high speed electrons or positrons. In this study we are utilizing beta particles that are high speed electrons. What would the effect be if Helium is synthetically ionized into alpha and beta particles? The beta particles will leave the containment and in the containment, alpha particles will be attracted to the electrons in the orbital levels of the remaining Helium atoms. The alpha par…

How plasma produce the fluorescent?? Is it true when the electron that suppose to ionize the gas which have less energy to cause ionization hit an orbital electron, the orbital electron will just excited to certain energy and back to ground state and emitting the glow discharge or fluorescent? If its true, the glow discharge doesn't means the gas is fully ionized right? if we want total volume of ionized gas, the glow discharge must not appear isn't it?? so what function the glow discharge do anyway?? for me it's just a color... i'm kinda confused right now, help... help..

I was wondering whether string theory unifies the other forces via symmetry or fields i've been reading on it and have become a little confused. also would someone be able to explain to me what generalisation (of an equation) means.. in non technical terms if possible, thanks.

Is it true that if you can know all outcomes and directions of every atomic particle then you can "predict" the future?