Physics

Why do ripples formed in water after throwing stone are circular not of the size or shape of stone ?

1) Why can hitting a heavy metal target with high-speed electrons produce X-rays? 2) Alpha particles have a larger mass and lower speed. Thus, they are more likely to knock electrons out of air molecules. Why? Is it about momentum? I thought particles with high speed can knock electrons out of air molecules easily. 3) Can we completely block gamma radiation? My teacher said that we can't. A piece of lead of 25mm can only reduce the strength by 2 times. If you add one more lead, then the strength will be reduced by 4 times. This goes on and on and then eventually the strength is still not zero. Is he incorrect? I think we can come up the number of leads that are us…

Hello everybody I have a question concerning the formulas of energy and its unit [math]E=\frac{m\cdot v^2}{2}[/math] [math]1 J=\frac{1 kg\cdot 1 m^2}{2\cdot 1 s^2}[/math] and [math]E=m\cdot g\cdot h[/math] [math]1 J=1 kg\cdot\frac{1 m}{1 s^2}\cdot 1 m=\frac{1 kg\cdot 1 m^2}{1 s^2}[/math] And because [math]E_k=E_p[/math] (e.g. a mass falling from a height its potential energy will be converted to kinetic energy when on its lowest point): [math]J=\frac{kg\cdot m^2}{s^2}=\frac{kg\cdot m^2}{2\cdot s^2}[/math] [math]\Leftrightarrow \frac{1}{2}=1[/math] What is wrong with my reasoning? Thanks! Function

Does anybody know how to find the constants a and b of the constraint equation of the frequency of the radial oscillations of carbon nanotubes with their diameter? Thanks in advance.

Albert Eienstein said that E=MC2 which means that Energy weighs the same as mass x light squared. When you look up a google search it says that energy does not weigh anything and further the synonym for "weigh" = ignore and neglect. Let me put my attention and focus on my equation Energy x acceleration=Force. At first glance people would say that it is impossible to weigh energy. So I did a little research. First, I went to a car show. There were many mean cars with souped up engines and one that had forced air into the intake. The man showing the the car had it calculated that 10,000PSI was being forced into the intake. PSI is pressure per square inch. Since pressure can…

How is neon manmade? Im doing a project, can anyone help me and revise the document? 20131020-Neon Research Project (2).doc

I have a question that I've been pondering for a while and I can find the answer to. Why do flakes of cereal in a bowl with milk, bubles on water, etc. stick to eachother? What is this called? Why does it happen? Thanks in advance. Peace Out, herpguy

When you force a material to vibrate at its resonate frequency, what's the path of movement it vibrates at? example :: Tuning fork - strike the fork against any surface. Does it always vibrate on a single axis or radial arc? reason :: I would like to create an experiment where I can force vibration to occur only on one axis; continually moving back and forth. This action, coupled with a magnetic coil, might generate enough electricity to power a small device. Also, if an object keeps vibrating at its resonate frequency, will it eventually degrade?

Thanks for answering my question, please i need help. Distinguish between potential difference and electromotive force and electric potential

how does a lens form an image

I need a pun or catch phrase on the either Neihls Bhor or Ernest Rutherford. The pun/catchphrase must me about the scientists experiments and/or their discoveries. Neilhs Bhor discovered that there were orbitals around the nucleus which electrons rise and descend from depending on their energy levels. Ernest Rutherford disproved the scientists before him, who believed in the raisin bun theory, with his famous gold foil experiment. Thank You (in advance) P.S. I`m not a 100 percent sure this is the right place for this question, but if you could spare a few minutes and answer, it would be AWESOME! Thanks again

Because one 3 dimensional view can be observed at a time or at once.

I didn't see an actual Philosophy of Science forum so I'm posting this here in hopes of getting some responses from more "hardcore" science folks. Back in my physics days in college I read all sorts of complex math with terms like Riemann manifolds, gauge invariance, tensors, etc. I was never anywhere near smart enough to understand these. Regardless, I had this notion that if only I *was* smart enough, I'd be able to talk the language of the universe. Most of my hero's are scientists, and I've always revered them partially because they did speak this wonderful language. Then years later, well after leaving college and going on to other things, I was reading abo…

Please excuse my ignorance if I seem to ask very basic questions but I am looking to gain a better understanding of things I do not know but know I need. In the pursuit of energy what would happen if a Hydrogen Atom was pressurized causing the electron to orbit closer to the nucleus. Thank you in advance for your time.

I formulated an equation which describes the radiation emitted by an accelerated charge in a gravitational field as [math]P = \frac{2}{3} \frac{e^2}{(\frac{m^2}{1 - \beta^2})c^3} \frac{1}{\frac{\sqrt{1 - 2\frac{Gm}{\Delta E} \frac{M}{r} + \frac{GQ^2}{c^4 R^2}}}{\sqrt{1 - 2\frac{Gm}{\Delta E} \frac{M}{r} + \frac{GQ^2}{c^4 R^2}}}} (\frac{dP}{dt})^2[/math] [math] = \frac{2}{3} \frac{e^2}{c^3} \frac{a_{g}^{2}}{(\frac{\lambda}{\lambda_0})} [/math] The unique part of this equation is that not only does it describe the energy emitted, but it describes the wavelength emitted [math]\lambda_0[/math] and an observer at [math]R[/math] measures the wavelength as [math]\lambda_…

all you need is a MIRROR. It works on the principle that, when you look at yourself in a mirror, you arent seeing YOU, per se, but the BACK IN TIME you. How? When you look at a mirror, the light rays start off at your eyeball, bounce on the mirror, get reflected back off into your eye, thus creating the mirrorical picture you see. Now. it takes TIME for those light rays to do all that stuff, going off your eyes, travelling headfirst into the glass of the mirror with a bang, then painfully lugging the picture off the mirrors surface into your eye again. all this takes time, init? light travels at 3 million miles per second, which means it takes 0.0008763 seco…

How can space and time be twisted while physically time and space do not exist? Confusing really.

Extended ising model ground state configuration algorithm Is there a general solver (or theoretical algorithm) for ground state configuration of extended ising model, which involves arbitrary lattice, arbitrary number(3,4,5) body interactions and arbitrary Hamiltonia, and arbitrary number of spin(-1,0,1 and so forth) ? Except exact enumeration, what could we do better? Could this problem be translated as an optimization problem? I know such requirement is too stringent. But is there some research or established knowledge that aims to accomplish this?

Hi, I want to do mathematical research (algorithm construction and mathematical analysis) on ising model ground state configuration. From what I know, the state of art research is using graph theory formalism. Could someone give me some advice on how to learn this subject (say, what books or papers to read) to a research level from a basic undergraduate math background? Thanks

I'm working on a video comparing two fictional characters, and who would win. I need to know how much Newton it would take to rip out a humans spine?

It is known that black holes give up radiation. For very large black holes, this will take a very long time. But nevertheless, they do, including smaller black holes. I am not aware though of any metric which describes this. You may actually rewrite the metric in terms of a rest energy for a non-rotating black hole [math](1 - 2\frac{Gm}{E} \frac{M}{r_s} c^2 dt^{2}) - \frac{dt}{1-2\frac{Gm}{E} \frac{M}{r_s}} - r^2 d\Omega^2[/math] You won't recognize this exact expression, but you might be aware it is another way to write the metric. You won't recognize it because I derived it. But what is interesting is that we can discuss the energy of the system in the metr…

comparision between supersymmetry and cpt symmetry

I've been very curious about this since I starting to believe about the origin of universe. What causes the big bang anyway when there was nothing in existence prior to it?

Mysterious island Appears shocking video: http://third-secret.pro-forum.co.uk/h55-new-island-announces-the-arrival-of-the-kingdom-of-god

The hypothetical Hawking radiation means that a set of baryons can be finally transformed, "evaporate" into a massless radiation - that baryons can be destroyed. It requires that this matter was initially compressed into a black hole. If baryons can be destroyed in such extreme conditions, the natural question is: what is the minimal density/heat/pressure required for such baryon number violation? (or while hypothetical baryogensis - creating more baryons than anti-baryons). While neutron star collapses into a black hole, event horizon grows continuously from a point in the center, like it this picture from: http://mathpages.com/rr/s7-02/7-02.htm As radius of event horiz…