Physics

Ok, I'm new to this forum and I have a problem I need help with. Please keep in mind that I'm not very experienced in Physics, so I thought I would ask the experts. A while back I bought a used chipper-shredder with a Tecumseh 8HP gas engine that was bad, it broke a piston and had a hole in the side of the engine. Anyhow, on the original 8hp engine it had a side shaft that turned a 4"diameter pulley. I have replaced the 8hp engine with a 6.5hp engine. I'm hoping to try to put a pulley wheel on the new 6.5 hp engine that will get me close to the same power that the 8hp engine had. Do I go with a larger diameter pulley wheel or a smaller diameter pulley wheel? My…

I've got myself turned around apparently. I thought voltage was the potential difference between oppositely charged poles - that voltage is a measure of the difference in charge carriers. I'm envisioning ionized clouds of opposite charge and I thought that the amount of voltage between the two would depend on the amount of the difference in charge between the two - that the amount of voltage would depend on the number of charge carriers. But somewhere in that bit up there I'm apparently off. Because you can have high voltage with only a small amount of charge carriers, or a small voltage with a high quantity of charge carriers. I'm not getting that at all and i…

Hello All, This is patent pending new Method of Nuclear Fusion (attached file) What do you think about this? Joseph Invention_Eng_Joseph Chikvashvili.doc

Hi everyone, I am a beginner in the field of laser science and I have been reading a few things about techniques like velocity mapping and charged particle imaging. I understand most of it, but there are certain terms/words that needs clarification. I am going to point them out and explain what I understand from then if any of you can explain if i am correct then please say so and if i am not, please correct me. Ok so first: " In the case of neutral atoms, radicals or molecules, a quantum-state-specific resonance enhanced multi-photon ionisation (REMPI) scheme is generally used to produce positively charged species with unchanged velocities; the recoil of a very …

Hi everyone, I'm trying to gather some ideas of subjects for an oral presentation in my Optical Properties of Materials class: I'd love to find something pleasant or at least nice to develop (like I heard "how a cameleon changes color?"^^), not too theoretical if possible... Do you have some ideas which could help me? Thanks you a lot R.L.

It takes @2000 electrons to equal the mass of one proton, according to a quick google search. The electrons, however, have 2000 times more electrostatic force than the proton; although the amount of force could be argued to vary, I think, according to the volume of the 2000 electrons. So if you began with some arbitrarily large volume for the 2000 electrons and began compressing them, their expansive force would increase in somewhat the same way a spring's potential energy increases as it is compressed. What I wonder is at what volume would the expansive potential of the 2000 electrons equal the amount of energy contained in the mass of a proton according to E=MC^2? …

How much energy is produced when an average human being paddles a bicycle normally? plz help me!

Actually I came across this quite some time back but never really understood why won't it work. Wiki it if you need a memory jog~ anyway quote from wiki and from another site,http://www.elmer.unibas.ch/bm/index.html. I'm not entirely convinced yet though~ I thought thermo's second law don't work on extremely small scales.. can anyone explain the problem wih this motor?

If i were to stand jupiter now with a telescope would i see life on earth 30 years ago? and if so : 1. if someone at that time was using a telescope and aiming at my exact position, could he see me looking at him? Also, if i was travelling faster than the speed of light and i looked back could i see the past by nanoseconds (etc), could i interact with the past through this method?

1. Can rotation of pedals by an averageperson produce enough energy to rotate a fan of diameter of 1 m at such a speedthat it can help to accelerate an air vehicle having a weigh of about 100 Kg? Please help me....and provide me the answer of this question as much as you can.

1. in AC corona discharge tubes (such as in ozone generator tubes), are all the molecules positively ionized? (out of the ones that are ionised of course, i know some aren't) or some negative and some positive? 2. if nitrogen is used in such a tube, will the ions only be N2+/-1 or will some be +/-2 etc? will any of them completely split into atomic nitrogen? 3. if nitrogen is used in such a tube, will the nitrogen ions stay in an ionised state and come out the other end still ionised or will they somehow combine (like oxygen forming ozone) or 'deionise' (for want of a better word) one another? i think that is all. please refer to which questions you are ans…

I wish the media would use their fact checkers. Sure the situation in Japan is breathtakingly horrific, but saying ridiculous things about radiation makes it seem orders of magnitude worse. For example, it was reported that the Navy was moving their ships due to radiation concerns. That's much more terrifying than it sounds at face value if you know anything about radiation. Even without shielding, radiation drops incredibly quickly with distance. [math]D_2=D_1\frac{x_1}{x_2}[/math] Where D2 is the dose(amount of radiation you'd receive) you're trying to find at location x2 and D1 is the dose you know at location x1. To see how dramatically the radiation decre…

Hi everyone, first time here. I have no qualifications in physics what so ever. I am working on an experiment and would like to know if there is a device that can measure the MASS of AIR that is pumped into a container. Does it exist? What is it called? My whole experiment is based on the assumption that such a device exists (I do not want to use scales). I have searched high and low to no avail... If such a device does NOT exist,I have found out that there are AIR FLOW measuring devices (AFM) in the market. Which means I should be able to calculate the air MASS (kg) from the air FLOW (kg/hr). The device I am trying to build pumps air into 2 (air …

I am wondering if it is possible to convert UV light into the visible spectrum? If so, how can this be done? The reason I ask is because I am intrigued by the hubble telescope pictures that show pictures of the sun in the UV spectrum. Did they convert the UV light into visible light or is it through some other method that they were able to obtain these pictures?

Is it possible to calculate the magnitude of the strong force in newtons?

to calculate the energy released from a deutiriume tritium fusion to creat helium4 with a neutron do take the MeV from deutirium and add it to tritium the substact the MeV from He4 and the total left would be the energy your gaining? ex H2 MeV is 1.2 + H3 MeV is 2.9 =4.1 and He4 MeV is 7.1 so 7.1 - 4.1 = 3 soo 3 is he amount of energy your liberating? is this right or is their a difrent formula? and in this link how does he get difrent binding energy compared to the graphic? thanks james

Alright, hopefully this is the correct place to post this, but the other day i was reading something about how the electron was first discovered, a man named J.J. Thomson did tests on certain gases and passed electrical current thur those gases. well, i have a few questions, and would like more clarifaction on how the procedure works. So, you have a gas sealed inside of a glass tube, and they're sealed at both ends with electrodes. (what is an electrode?) and evidentally the electrodes became one anode and one cathode. when the source of electricity was turned on or whatever, the cathode(negatively charged) produced a glowing beam to the anode (positvely charged) …

It's been well over a year now, sicse I invented the "Weighted Chain Pump". So what's wrong? Why are oil compays not thinking about my idea? I know ill probably be banned for this thread (why im being discriminated against I simply can't understand). Anyways, if you all want your families to carry on living at aleast the current standard of living, then don't dismiss my invention. If you can get a litre of oil for less than 10ml(an honist guess) of fuel then let me know. It's all about getting to deaper petrol out at sea or land. Anyways, your welcome to post your ideas!

Since changes in a gravity field supposedly move at the speed of light, I am wondering if the same is true for changes in a (static) magnetic field (e.g. a bar magnet). First, do such magnetic fields change/ripple under any circumstances and, if so, so the "ripples" move at C. If so, are these "ripples" EM waves or something else? If not, why don't/wouldn't magnetic fields change/ripple in the sense that gravity fields are supposed to be able to?

is it possible to calculate plankes constant from only knowing the frequency of a emited phonton and the speed of transition. if so how thanks

Why is it that light passing through a space does not interact with other forms of light passing through the same space. IE (from feynman: light from you appears to me as color X, but passing through the same space light from person Z to person A. the light waves do not interact with each other.) Yet if we were to put up a small colored lense light interacts so heavily with it.

I don't know if light could ever travel in a recursive loop without some gravitational mass to curve space. I've heard some people say that light can generate gravity in itself, so maybe there's some situation possible in which light could curve into a loop due to its own innate gravity. Either way, the point is that I would like to know whether IF light would travel in a closed loop, would the loop have inertia/mass or could it travel at C as a loop? It seems to me that it would not be possible for such a loop to move at C because as it approached C, one side of the loop would be redshifting while the other would be blueshifting. It seems like particles with mass cou…

I was wondering why we use unit vectors, what's happens if we don't and in the definition of a unit vector, does a magnitude of 1 mean a scalar of 1 (for a that vector) or that the vector itself only represents one/single arrow ?

I am doing a jr high science experiment testing the heat retention of different types of coffee cups..styrofoam, paper, plastic,ceramic, and stainless steel. Is heat retention physics? Thermodynamics? What causes heat retention? I would like to make a really good report on this subject...does this involve intermolecular forces?? any websited to help with my research..I have done 2 trials of my experiment but want to beef up my research and report .. Thanks!!

I've recently come across some equations for velocity and acceleration and they have at the end of them: dx/dt etc. and i was wondering if anyone could explain to me what they mean, because unfortunately i have no calculus knowledge and i have come to understand that its within the language of calculus. To do with derivatives i believe..