Modern and Theoretical Physics

This theory is a space fold theory. Scientist have always theorised away of folding space like a sheet of paer in have and than traveling through a vortex of some kind. But here is my side. If in theory this idea is the same as a basic equation, maybe the same goal can be achomplished by doing the reverse opereration. What would happen if you unfold yourself? Equation Model: y=(1/2)x 2y=x In this theory, the x variable is space, and the y value is yourself. As demonstrated by the equation such a throey migh work. But being a child I do not have the sufficiant data and resourses to even think beyond the theoretical part. Lance Cho tr8b2@bel…

Many friends in this forum told me that the rate of transfer of heat mainly depends on the difference in temperature rather than difference in specific heat capacity. here's an example, what's the answer from you?

Does anyone know where can I get a table regarding LIFT/DRAG RATIO for copper of thickness 1mm, 2mm, 3mm etc to 20 mm? Does the EM Lift/Drag Ratio varies with the thickness of copper? If there is no table a formula would suffice!

Please have a look at the photo below. Thanks Referring to the figure, I tried to find out the current flowing in AB so as to solve it. However, I was not able to finish it as planned. Can anyone give a brief note on the solution? Moreover, I have some questions in my mind. 1. Can a current flow through in this sequence, DABE can CBAE? If yes, then the two currents meet in the branch AB with opposite direction. Will a problem arise? 2. Can a current pass through a particular junction two times? Thanks. [Edit] Important: Please neglect the question in the photo. Here is the question: Find the reading of the ammeter in terms of E(Emf/V) and R

I'm new to this so bear with me. As i understand it all matter is, is lots of tightly compacted energy. so there is lots of energy in everyday objects. this is the basis for nuclear energy and nuclear bombs. they use uranium because it has the largest nucleus. but it has the downfall of all the unwanted radiation. so my question really is: Why can't we use something other than uranium, like maybe limestone or iron and take the energy out of that? maybe we could even use things we would be putting in a landfill? if everything is just energy anyways we should be able to get energy out of anything? thanks for any insight Jimmy Ray

OK, there are a few things I don't really understand about this, so I'd appreciate it if someone could explain the following in layman's terms, assuming it can be done in such a way... 1) How exactly is antimatter produced? It's done in particle accelerators, I know, but since, presumably, all there is to work with is matter, I find it hard to see how antimatter can be got out of it. 2) Having established that antimatter can be produced in some way, and given that, for example, a positron and an electron will annihilate each other in a burst of gamma rays, apparently the energy resulting from such annihilation can be used to create these particles again - but c…

I think these questions are linked, but I don’t really know how to find the answers. 1) Does time exist outside of a gravity well? I was listening to Science Friday and remembered these questions. I believe that time only exists if there is a mass acting on the observer even if that mass is the observer. 2 If you are in a space station that is spinning to give artificial gravity, then will spinning the space station always cause artificial gravity? My guess is that in order to have the acceleration, the space craft has to be in a gravity well. The corollary question is, does a change in the gravity well affect the perceived gravity inside the space station…

Assuming time travel was feasable, the production of a time machine could open a whole box of casual paradoxes. For example, the girl who traveled back in time to kill her mother. If the mother dies while she was a young girl, her daughter would never travel back in time to kill her. How do we make sense of this? Or consider the time traveler who leaps ahead and learns of a new mathematical theorem in a leading journal. Suppose he returns to his own time and publishes the article in a journal. The article is the same one he read in the future. Where did the information come from? The information seemingly came into existence from nowhere. Are there laws of physics…

I have a question. 1.We all know that electron is negative and the nucl is positive and that they attract to each other. My question is why the electron ORBITS the nucl? What are the fources influencing that behavior of the electron? Thank you

alrighty, so I have a new project on confineing a plasma using microwave radiation, and well after searching through several pages of google results and the like I can't find any existing research on it. Has anyone ever heard of research along these lines?

I've read that strange matter (or quark matter, or the degenerate matter supposedly found at the center of neutron stars) could potentially be stable beyond the conditions in which it was formed, unlike neutronium, which is only maintained by intense gravity. So, I'm wondering, how likely is this? I've also heard that it could have "cannibalistic" properties, in that it would potentially convert all normal matter it came into contact with into more strange matter. How likely is this? Is there even any way to tell? Out of interest, how dense would strange matter be (obviously very, but numerically)? How quickly would it be able to cannibalise ordinary matter? Could thi…

I was discussing with a few friends the idea of photons in general relativity...essentially that light is a geodesic. However, it got me thinking to loop quantum gravity that would deal with a photon rather than light itself...wouldn't the photon definitionally take up space? Obviously it does, but how much space? Further, isn't light energy? And as Einstein pointed out, energy has mass. So wouldn't it distort spacetime only slightly that has no real significance in everyday life? But none of my texts answer these questions...and google isn't answering either. So my question is twofold: 1. What is the volume of a photon? 2. What is the density of energy for ph…

In Beta negative decay, a neutron changes into a proton and elctron and the electron is emmitted with a neutrino. Where does the neutrino come from ? Wouldn't that make the element a cation (+ve)? In Beta positive decay, a proton converts into a neutron, releasing a positron and an anti-neutrino. Is the reverse possible ? As in will a high energy positron colliding (or by any other method) with a neutron form a proton again ?

Im going to buy a digital geiger counter after i buy a laptop, but i have a few questions. The geiger counter: http://unitednuclear.com/geigers4sale.htm Is a digital pocker counter. Im wondering, if it only picks up beta, gamma, and x-rays, then will i be able to find things emmiting alpha? By this i mean, alot of low level background (like metal contamination, thoron lantern mantles, smoke detectors, and im sure tons of others stuff) is alpha. Im worried that the things emmiting this alpha, will be invisible from my detector. What i mean is that, from some things ive heard, whenever theres alpha radiation, theres alittle beta/gama being released as well. I hope thi…

Hi all, I'm new to this SFN forum and thought i would ask a few 'simple' questions. 1) I was told that an Atoms would be the size compared to a Molecule - as in the Earth being made solidly of grapes: IE, Each grape on scale is an Atom. This seemed a little to small, what are your opinions? 2) Whilst water (pure), does not conduct electricity and Petrol does not ignite (Only the fumes). Someone brought this to my attention - Electricity does not flow. I have read a bit about this and besides (the change of the 'flow' of direction from Neg to Pos in the science books of old- it now seems to be Pos to Neg - welcome to Entropy!), but there are quite a few arti…

Theoretical Physics in the end is simply a set of numbers (mass, impulse, energy etc.) related to another set through a series of mathematical operations. Has it ever been tried to just set all the physical properties in an n-dimensional space where each dimension is a property and just follow the path of the point and points in this space as they interact ? For example a particle may have n properties (x,y,z,t,mass,spin,energy,mass,impulse, size of particle, etc.) so you set each dimension of the space to correspond to each property, so aside from the typical 4 dimensions of space-time you would have other dimensions corresponding to the energy, another to the mass, anot…

Is there a diagram any of you are aware of that displays the duality of matter, in other words, the ability for matter to be a particle and a wave at the same time? TIA

hey, my names Avont, im in 10th grade, and iwas just wondering, they say all this talk about the big bang theory and it was started from an explosion from a single point in space.. how did that point get there? just a point come out of nowhere i just don't get it, someone had to place that point there, or something happened and why can't darkmatter emit any light, so if you shined a flashlight on darkmatter, what would happen

i know alot of people think star trek is all science fiction, but i think some of the technology they have can be made in 20-30 years. or mabye even now, the military has bein expermenting with anti-matter since the 30s. who knows what they have now.

I see constantly written that the gauge group of the SM is SU(3)XSU(2)XU(1), but what operation is that represented by X? Given that all the 3 terms are Lie groups, I think that is possible that is Group Direct Product?

Ran across this link that might create debate: http://www.newscientist.com/article.ns?id=dn7616. My gut feeling that it is true, but teachers I know say that a world view may show otherwise. Anyway an interesting link.

They say they HAVE done it this time. Not once, many times. Using Pyroelectric crystal ! Check out this link :- http://www.christiansciencemonitor.com/2005/0606/p25s01-stss.html

I've been hunting around for courses in physics. However, my local Uni fails to offer evening classes on the subject, and due to financial constraints I'm unable to afford those 'distance learning' courses which are available, so I'm basically tied to being self taught, until next year...but I'm eager to start now. What I need is recommendations on a number of books that can guide me from basic equations on classical mechanics (I'm talking high school / A level) through to relativity and maybe quantum mechanics (if I feel I can tackle it.) I ideally need the books to follow on from the last...I realise it's a long haul being self taught, and I realise proper education…

Can a superconductor be used as a electromagnetic shield against magnetic field? Where can I find some information regarding this?

Does anybody know of any good reading material on the electromagnetic field theory? Internet, books, articles, anything?