Physics

Hi! My name is ufuk ı am 11 so ı am not someone knows how quantum physics work. Actually, ı am here to just find a physics game/simulator ı can mess with electricity and try to make a working engine etc.

I was looking up formulas for inductance of a coil with an air core and i found this one. L=(r^2*n^2)/(9r+10l), where L is inductance, r is radius of coils, n is number of coils and l is length of coil... what is length of coil? is it total conductor in the coil? also, i need to calculate resonance of an LC circuit. i got the formula R=1/2pi(LC)^1/2... does current or voltage affect resonance? does resistance?

hi guys hope i`m posting this in the right place. I`ve been reading stuff on the fusor by Farnsworth/Hirsch and I`m not convinced that it is capable of fusion as some of the texts suggest. I`m just wondering if anyone has produced a fusor that actually produced helium as a by product. The second part of my question is could it be converted to produce power and if so how much and is that more then the amount put in? now this is a question from an amatuer so could we keep the wording simple as if it gets too full ofjargon i`mgonna loose you. cheers guys

I want to find out what the minimum distortion (or curving) of space should be to prevent light from escaping that distortion. http://physics.stackexchange.com/questions/8477/why-cant-light-escape-from-a-classical-black-hole I am not aware of any way of measuring the "amount" of distortion a mass imposes on space. Can anyone shed some light? If so, would you be able to tell me the minimum amount of distortion needed to capture photons such as in the case of an event horizon.

A block and tackle system of pulleys is used to raise a load of 500N through a height of 20m.the work done against friction is 2000J. what is the displacement of the effort and the mechanical advantage of the system?

This isn't meant to endorse such a project, just speculate on whether or not it's possible. Suppose Earth disposed of all its nuclear weapons by firing them at Mars or at craters on the moon. The thermal radiation would presumably be at least partly absorbed. Would there be a layer of molten rock that would then solidify in a semi-spherical shape perpendicular to these planets' gravity, sort of like the almost-flat manner in which ponds freeze over, or would it just sublimate directly into gas? If the former, would this be functionally equivalent to a convex mirror? Would we then have a "virtual image" of the sun at night that would be smaller than…

hi, this may be a dumb question, but I'm wondering (read carefully every details) : Can we use a very strong electric field to separate electrons from nucleus of some hydrogen or helium gas (a macroscopic quantity, not just some particles, it's not a particle accelerator), then accelerate the nucleus' at high speeds using electric fields, then making them collide in large quantities... (and maybe uses the electrons at the other side to go back with nucleus at the end) and then use the fusion energy obtained to power the whole machine ? thanks

I'm just now learning about the experiments done in Europe right now. I was wondering if anybody could comment something about it, explain something, or really anything would help. I am currently researching it for a physics assignment, but personally I have become too involved to stop learning about it. Any comments would help...thanks -Matt

is it possible to describe magnetic fields as a form of energy and that certain materials like bismuth are able to repel the energy. let me explain i have seen an experiment were a magnet was floating between 2 bismuth slugs that were separated by a conductor so that there was enough space to place a magnet between then. the magnet then floated, i would describe this as the energy produced by the magnet is repelled by the bismuth, both the north polarity and south polarity energy fields. other materials that are magnetic can absorb 1 of the polar energies.

Does anyone else find it amazing that a single, ten gram bullet fired at a target on a shooting range delivers approximately 605.52 joules of energy to it's target? Do you find it amazing that a single gram of matter can convert into 299792458 joules of energy (given 100% conversion)? If you think so, or have more amazing Physics-Facts please do share below!

this is a video i made. url deleted

Anybody knows an interdisciplinary computer simulatior of science phenomenons ? that involve physics, biology and chemistry at same time, thanks!

can anyone pls explain me the working of an inverter....the battries in the inverter gives very high voltage but from inverter me get very less voltage supplies...how is it so???

Now when the spring recoils, it loses its elastic potential energy to the dart. If it loses its energy how does it come back to its original shape. I'm thinking it is the elastic potential energy that is used to make the coil come back to its orginal shape. Also let's say a spring was compressed and I took my hand away. Now it recoiled back to its shape. The spring didn't transfer any of its added elastic potential energy, to any other object. So does the spring has more energy now. When I compress a spring I'm thinking I'm adding extra potential energy. Am I adding extra energy or, changing the allready existing energy in the spring to elastic potential energy. …

My father who is a mechanical engineer seems to think that something cannot come from nothing but I think that he is wrong because my father evidently never heard of virtual particles and quantum field theory. Another thing my father believes is that mathematics doesn't really exist in nature but again I think he is wrong on that one because the evidence shows that mathematical relations and functions are an integral part of physics and that physics cannot really be done without the mathematics. So in other words mathematics is part of reality but my father who is not a physicist does not seem to grasp that.

Does dark matter surround a galaxy in a sphere shape ? Does this sphere have a constant density ? Or a changing one, like less and less dark matter towards the outer rim of the sphere ?

Taking a breather from my thought-experimenting with deep sea stuff. A little background - in Apollo the inertial guidance system was instrumented through what's called the Flight Director Attitude Indicator (FDAI) or 8ball. The FDAI shows your pitch, yaw and with a ring around it, your roll. But you can think of the roll as the axis on which the pitch and yaw translate. Over time the inertial guidance system would deviate and need to be corrected using the optics. Now it is possible to find the deviation over time by simply observing the new roll axis of the FDAI as it shifts off the poles that were at 90 deg yaw. But I haven't been able to confi…

Hello, this is my first post here, I'm not very passionate about physics, I'm a programmer but I have a little dilemma related to physics. I was talking with someone about nanotechnology and I said that we can create nanorobots in this way(theoretically): We create a "robot creator machine" that can also create a smaller version of it self. The smaller version of the "robot creator machine" will create a smaller version of itself and so on. We keep it up to a point we have a nanometric "robot creator machine". Then the robots the nanometric "robot creator machine" creates will also be nano. The person automatically refused the idea saying that this isn't poss…

Found this article http://www.bbc.com/news/science-environment-28543990 There is also this article with heaps of math http://www.nature.com/ncomms/2014/140729/ncomms5492/full/ncomms5492.html About Schrodinger's cat Glimpsing this Cheshire Cat requires what quantum physicists call "weak measurement," whereby you interact with a system so gently that you avoid collapsing it from a quantum state to a classical one. Now according to Schrodinger's cat any measurement should collapse the quantum state.

Is it possible to have a mercury plasma cooled down to the point it becomes a superconductor?

What Moiré Excitons in Van der Waals Heterostructures mean in physics?

Why doesn't the moon fall on earth? What causes an orbit?

Electroactive polymes.A type of material that reacts upon an electric current goes through So, planning on doing an EAP refreshable board for the school science fair.the purpose is to help the blind. How much does it cost,because most people who are visually impaired are the poor (WHO data) I would be grateful if anyone has any theory on creating a book reader for the blind

The speed of light within a medium declines as far as I am told only within a medium, but is the same always with every pinball machine trajectory, but does it come out of the medium in a delayed manner? I mean like light that moves through a perfect diamond? I am asking this because I read that some very rubbery materials absorb alot of energy from a photon while it is cascading through it. Is light a "pulse shaped particle" when it interferes with a diamond and gets scattered around? And is it otherwise a sinus wave moving through a vacuum? In latter case, moving faster? If light can not be fine-tuned and is always the same whatever the situation, does this mean th…

http://www.suntimes.com/lifestyles/health/2299276,CST-NWS-muons21.article