Protons Definition and 343 Threads

Hello guys, can you help me on this question: What accounts most for the spin of protons? I think the quarks only contribute a few percentage for the spin, but I'm wondering if there are new discoveries about the main cause of proton spin thx!

Homework Statement A proton is confined in a uranium nucleus of radius 7.41 fm. Determine the proton's minimum kinetic energy K less than or equal to delta K according to the uncertainty principle if the proton is well approximated by a Gaussian wave packet confined by the nuclear diameter...

Near Earth, the density of protons in the solar wind (a stream of particles from the Sun) is 8.90 cm-3 and their speed is about 490 km/s. (a) Find the current density of these protons.(b) If Earth's magnetic field did not deflect the protons, what total current would Earth receive?For part a I...

Someone once said that a positive hydrogen ion in a solution is not just a proton. When queried he replied by explaining that a positive hydrogen ion in solution will have a relatively high charge density because of the small ionic radius. I can't see any difference: a proton and a positive...

Homework Statement A point charge q = -0.80 nC is fixed at the origin. Where must a proton be placed in order for the electric force acting on the proton to be exactly opposite to its weight? (Let the y-axis be vertical and the x-axis be horizontal.) Homework Equations F=(kq1 q2)/r^2...

Is it possible to remove a proton from an atom and then as a result will the element of the atom will change? Would anything else need to be remove to keep an equal balance in an atom, ex. neutron or electrons? How much radiation would be created by removing a proton.Is more rediation...

1. A capacitor where C=1X10^-5 F and R= 1X10^6, there's 1000 electrons on the plate at t=0. How would I find the number of protons after 2 seconds? 2. half life= .7Tm, mean life=RC [b]3. I put the R and C values into get the mean life and got an answer of 7 seconds, and than to...

[COLOR="Lime"]:zzz: :confused: :confused: I would like to know if you can create a false but almost irrisitable ground in which electons have an attraction like a magnet. For example if it were to lightning outside I would like to create a charge in which the electricty thinks my path chosen is...

Protons + Neutrons + Electrons =? This question has been boggling my mind for some time, hopefully some of you can shed some light on the subject. What would happen if one were to shoot a beam of Protons, a beam of neutrons, and a beam of electrons next to each other? I've made a little diagram...

thanks hootenanny:wink: im not sure if my teacher had set this question wrongly or not? because I am finding it hard to answer. the question goes: TWO statement below are INCORRECT. which are these 2 statements? A.) the nucleus of an atom contains only neutrons and protons. B.)The...

Hi everyone, I have a problem regarding this question. An electron is and it is being attracted to 2 stationary protons. The 2 protons are at a vertical distance of 6x apart and the electron passes through the centre of the line joining the 2 protons (3x below the top proton and 3x above the...

Hi Guys, I was just wondering if you could help me, I seem to be having some problems getting to the correct answer (possibly because of my calculations). If two protons collide head on, both with energy 2keV... show that the closest approach is 7.2 x 10exp-11 cm. Now I know that when the...

Hi, I'm new to this forum, so I'm sorry if I've posted this in he wrong catergory. Anyway, I'm studying AS physics at the moment and my teacher was giving the class some lessons about the strong nuclear force and electrostatic repulsion of nucleons making the nucleus stable. To get to the...

Imagine a sphere of radius a filled with negative charge of uniform denisty, the total charge being equivalen to that of two electrons. Imbed in this jelly of negative charge two protons and assume that in spite of their presence the negative charge distribution remains uniform. Where must the...

Protons are projected with an initial speed of v0 = 9550 m/s into a region in which a uniform electric field E = 720N/C [down] is present. The protons are to hit a target that lies a horizontal distance of 1.27mm from the point at which the protons are launched. a) find the two projection...

for the following question: a proton with the total energy E=3E0please calculat the proton's (a) kinetic energy (b) velocity (c) momentum (d)mass my problem: 1) can someone double check my work? (a)Ek=2EE0 (c) p=[8^(0.5)]EE0/c (d) I've tried (mc^2)^2 + Ek^2...

I have read about "Thompson Cross section for free electrons" My problem is there must be the other cross sections photons are scattered by free electrons. photons must be scattered by aka protons and as well by alpha particles. Is there any defined cross sctions for the other particles as...

The question is how far apart must two protons be for the magnitude of the electrostatic force acting on either one of them to be equal to the force acting on a proton at Earth's surface due to gravity? I calculated the force acting on a proton at the Earth's surface, very small of course...

Can someone show me how to figure out the mass of 1ml. of protons? I have been out of school for 20yrs. and have no clue as to how to do this.[

This might be a dumb question, but in all my years of chemistry and physics studies I have never gotten an explanation of where electrons and protons get their charges from. I don't know if this is the right forum, maybe one of the physics forums might be better? Maybe a physical chemist can...

And this phenomenon also occurs in neutrons?

Their spin quantum numbers are 1/2 and -1/2. How to explain these in terms of quarks?

Anybody who know something about the temperature dependency of the proton Larmor frequency say for protons in pure water? I am sure people with experience in NMR spectroscopy know. Any good articles/references? I am not asking about: -temperature dep of the proton density beeing...

A plasma consists of both ions and uncharged particles of gases. Is it possible for the uncharged particles to fuse or only atoms whose protons have been stripped off can fuse?

http://www.symmetrymag.org/cms/?pid=1000063&printable=1 describes detection of cosmic rays with unbelievable energies: This is a proton with 20 joules of energy - about the same energy as a well driven golf ball in mid-flight. The thought occurred to me that (if we can figure out where these...

I have tried everything to solve this problem, and I just cannot come to a conclusion. If anyone finds it comes easy to them, help will be greatly appreciated. :) Here goes: A straight stream of protons passes a given point in space at a rate of 1.5x10^9 protons/s. What magnetic field do...

Do proton's decay? and if so, what do they turn into? and can they decay when they are in a nucleus? I read a theory on how the universe will end up being a sea of electrons, and what protons become when they decay.

:blushing: I am getting confused. electrons, protons, which finger goes where in the left hand rule... agh! lol, I am muddling myself all up. i understand the rule (well i hope i do by now as that means the rest of my homework is wrong) but the last question of my h/w is almost killing me...

Okay ppl, I have a question, I'd just like you to check that my working here is correct. Q: A space probe of mass m=490kg is driven by an ion propulsion motor that involves the use of positive ions, each of mass m=2.18*10^-25 kg and having a charge of magnitude e=1.6*10^-19 C. These ions...

Do protons also exist as "proton waves" similar to the "electron waves"? Akira Tonomura has written a book called "The Quantum World Unveiled by Electron Waves" published in 1998 by World Scientific. In his book, he explains that in 1955 G. Moellenstedt and H. Dueker of Tuebingen University in...

Can protons emit-absorb "virtual" photons? Does a free single proton behave like a free electron in the sense that it emits and absorbs "vitrual" photons as it interacts with another free or bound proton? Are there any special conditions under which protons emit and absorb "virtual" photons?

Neutrons and protons consist of quarks right? my question is ;has anyone theory as to how are they aranged inside of protons/neutrons?. one orbits another or whatever?

PART 1. Magnetic Field of Electron The electron and the proton both have Magnetic Moments. By definition (Penguin Dict. of Physics, 1991) the term Magnetic Moment means: 1. SYMBOL, m,: "A property possessed by a permanent magnet or current-carrying coil, used as a measure of the...

Protons electrons... What prevents electrons and protons from being stuck togeather? how do they just keep flying around the protons and nutrons?

Despite studying chemistry I've never actually been given this information, any explanations/theories that could possibly explain why?

If opposites attract, why don't electrons crash into the nucleus. I've been told its because the electon is spinning so fast, it orbits, but I know this can't be so because then at absolute zero, the electron should then crash inward or even at a higher temperature. Or is it the "weak nuclear"...

A stream of protons passes a given point in space at a rate of 10 E9 protons/second. What mafnetic fiel do they produce 2.0 m from the beam? i think i would use I= 1.6 E-19x10 E 9 and then B=(permativity of free space x I)/(2pir) using 2.0 as r? am i totally off or close?

A stream of protons passes a given point in space at a rate of 10 E9 protons/second. What magnetic field do they produce 2.0 m from the beam? Kind of know where to start, but not exactly. the current would be 10 E9 multiplied by 1.6 E-19 i think. and then i think i would use B=(permativity...

Hey there guys... I got a question for are you whiz's... Let's say you place an electron and proton a certain distance from each other and allow them to accelerate towards each other. Just before the collision, which is moving faster?

dear reader, the electrons are negative and protons are positive was proved by jj thompson. he proved it using the discharge tube. the cathode rays which started from the cathode(-) to the anode(+) was said to be negative because of its attraction to the anode. is there any other...

dear reader, Does anyone know about Quark. i know that quarks make the nutrons and protons. But i still don't understand it clearly. Benzun

in a magnetic field, i know that electrons and protons are deflected in opposite direction. electrons are deflected more greater because electron are lighter than proton. but, why are they deflected? i understand why it will be deflected if they are in electric field. but why they are...

Do protons decay or are they completely stable? If they do then what is their half-life?