Proton Definition and 836 Threads

Hello, So I'm reading about isospin in Griffith's Introduction to Elementary Particles, but the concept seems rather fishy, and I'm not quite sure what to make out of it. For example, if p and n (proton and neutron) are seen as different states of the same system, then what does...

Homework Statement Diagram shows the separations of a proton, electron, and α particle (charge +2e). What is the force (magnitude and direction) on the proton? Homework Equations Addition of vectors, Coulomb's law The Attempt at a Solution I keep getting 82 degrees but the answer...

Homework Statement The mass of a proton when at rest is m. According to an observer using the detector frame, the speed of the anticlockwise moving bunch, A, is such that va^2/c^2=24/25 Show that the total relativistic energy of a proton in bunch A, as observed in the detector frame, is...

Hi All Whenever there is a solar activity two things are mentioned, SPE, CME and X-ray. Does anyone know the difference between SPE and CME? I couldn't find a descriptive or convincing answer on these two. What particles are associated with CME, is X-ray a part of CME? And what effects could...

Need help with this question. What are the wavelengths of the two photons produced when a proton and antiproton at rest annihilate? Any help is appreciated, thank you :)

Homework Statement In a certain particle accelerator, a current of 300μA is carried by a 4.00-MeV proton beam that has a radius of 1.30 mm. The mass of a proton is 1.67 x 10-27kg. If the beam hits a target, how many protons hit the target in 3s? Homework Equations The only equation that...

Homework Statement The mass of a proton is 1836 times the mass of an electron. A) A proton is traveling at speed . At what speed (in terms of ) would an electron have the same kinetic energy as the proton? B) An electron has kinetic energy K . If a proton has the same speed as the...

Can anyone tell me, in detail, about Neutron - Proton interaction. Newbie here, so please use easy words(i know enough about quarks and gluons as well as strong interaction forces)

Does anyone have any suggestions whether proton or electron or other is shooting outward from the Sun during the Geomagnetic Storms? Thanks in advance for any suggestions

Hello, I'm taking a particle physics class and we're using Griffiths' book "Introduction to Elementary Particles". I was reading in it but two statements in it (on the same page, for reference p33 in the second edition) struck me as weird, and as I would greatly appreciate if anyone could...

Homework Statement Consider the Hydrogen atom in a magnetic field of 2T. If the atom is in its ground state (orbital angular momentum L=0): (a) Write down the magnetic moments of the proton and the spinning electron. [1]Homework Equations I am aware that the magnetic moment μ =...

What do you guys think of the Ion Proton 1 developed by a chemical engineer named Jonathan Rothberg? It can supposedly sequence most of a human genome for around $1000 compared to the past where had it costed millions. I don't recall quite clearly, but I think researchers at IBM are...

Homework Statement A proton (mass= 1.67×10-27 kg, charge= 1.6×10-19 C) traveling with speed 1×106 m/s enters a region of space containing a uniform magnetic field of 1.2 T. The magnetic field is coming out of the screen. What is the time t required for the proton to re-emerge into the...

Homework Statement (background info) The source of the sun's energy is a sequence of nuclear reactions that occur in its core. The first of these reactions involves the collision of two protons, which fuse together to form a heavier nucleus and release energy. For this process, called nuclear...

Dear friend, I am getting confused in this question;what i learned till now is that number of proton+number of neutron=atomic mass. But while searching the net i got this equation atomic mass = mass a x fract a + mass b x fract b. can anyone tell me which is the correct (not approximate)...

Dear Forum Users, I am looking for a database of proton fluxes. I have found already the SOHO database: http://umtof.umd.edu/pm/ but I need also the database for energy range of 1keV to 100 keV range. Does someone could send me some hints where to search? nykon

A proton, mass 1.67 x 10^-27 kg , is projected horizontally midway between two parallel plates that are separated by 0.8 cm , with an electrical field with magnitude 7.2 x 10^5 N/C between the plates. If the plates are 4.70cm long, find the minimum speed of the proton that just misses the lower...

If an electron at rest is initially located at distance r from the proton is shifted to infinity what is the energy of electron proton system in the final state?

Dear forum users, I have a quite simple question. I have got a flux of protons measured in 1/(cm^2 s sr), I would like to have it in 1/(cm^2 s). nykon

In this link the proton charge radius is calculated based on an experiment involving a muon and a proton http://www.sps.ch/en/artikel/progresses/muonic_hydrogen_and_the_proton_radius_puzzle_20/ It talks about "In summary, we have measured the muonic hydrogen transition at a frequency of...

http://en.wikipedia.org/wiki/Timeline_of_the_far_future

I was reading about Earnest Lawrence and a question dawned onto me; Let's say you bombarded a metal, let's say iron or copper, with high energy protons coming from a cyclotron. The protons going from the "dees" into an accelerating vacuum tube with the specimen at the end. Would the proton beam...

Homework Statement The electron is traveling at a speed of β=.9999999, γ=1957, with mass mc^2=.51099 MeV. The Proton is traveling at a speed of β=.9, γ=2.29, with mass mc^2=938.27 MeV. They are heading in opposite directions, directly towards each other on the x-axis Find the reference...

Homework Statement An electron is accelerated through a potential of 10^9V to the right. A proton is heading to the left towards the electron at .9c. Find E,K,p for the electron and proton from the rest frame, and from each others frames. Homework Equations The Attempt at a...

Homework Statement The electric field strength is 47100 N/C inside a parallel-plate capacitor with 8.60 mm spacing. A proton is released from rest at the positive plate. What is the speed of the proton (in m/s) when it reaches the negative plate? Homework Equations Vf=√(-2U/m) I think...

Homework Statement A moving proton has 6.4x10^-16 J of kinetic energy. The proton is accelerated by a potential difference of 5000 V between parallel plates. http://members.shaw.ca/barry-barclay/Self-Tests/test09/elecst17.gif The proton emerges from the parallel plates with what...

A proton is traveling horizontally to the right at 4.20×106 m/s. Find (a)the magnitude and (b) direction (counterclockwise from the left direction) of the weakest electric field that can bring the proton uniformly to rest over a distance of 3.40 cm. Part C: How much time does it take the...

This concept may have been discussed before, but I couldn't really find any that asked the same question. Through multiple sources, I have discovered that, in the LHC, we have the ability to propel protons to 99.99999% the speed of light (relative to a stationary object), and make them collide...

Homework Statement When a beam if high-energy protons collides with protons at rest in the laboratory, pions are produced by the reaction p + p --> p + p + ∏. Compute the threshold energy of the protons in the beam for this reaction to occur. Homework Equations (mc^2)^2 = E^2 - (pc)^2...

Homework Statement I need help with a problem I was just given an equation (F =q VxB )at the end of class and expected to solve a problem but I am not sure what to do. A proton is moving at speed 5x106m/s in the magnetic field of magnitude 6x10-2 T indicated in the diagram. a) find the...

Hello there, I was just reading some articles on Wikipedia.org and found an article on proton decay. I will quote a part of it: How would that be visualized? I've got a basic understanding of particle physics, but these concepts seem rather advanced, yet, I insist on wanting to understand...

Homework Statement Calculate the kinetic energy required to accelerate a proton from a rest position to 0.9999c. The mass of the proton is 1.67x10-27 Find the ratio of kinetic energy to the energy of a proton at rest Homework Equations Erest = mc2 Ek = mc2/√(1-v2/c2) The Attempt at a...

hi everyone, I have a question concerning the magnets physics more precisely about the Kickers/Dipoles. For my work, I need to design an optical system capable of deflecting a proton beam (4 GeV) switching between to 2 angles (+ 118 mard and -118 mrad) in a raw. Can a pulsed magnet...

So I understand that when you deporotonate a carboxylic acid, you get a RCOO-. This causes a delocalisation in the two oxygen atoms. I read somewhere that because of this delocalisation, it makes it less attractive to Hydrogen ions (protons). This makes the carboxylic acid more stable and...

An electron and a proton can not form a neutron because they are short about 800KeV of energy. If we place an electron 200 fermi from a proton there is a strong electrostatic attraction. As the electron moves towards the proton electrostatic potential energy is converted to kinetic energy of the...

In every textbook there are pictures of protons with spheres. This implies that there is some hard case and that that hard case is made of something. is this picture misleading? protons are made of quarks but i think only three of them. if quarks are not spherical with a casing then what is...

Suppose we could isolate a single proton and a single electron, and have them near each other without the high kinetic energies like in particle colliders. imagine holding them in a perfect vacuum without gravity, a mm or so apart lol. Then we let them go. What would they do? They're...

Homework Statement What is the force of attraction between a proton and an electron in a hydrogen atom, if they are 5.00 x 10^-11m apart? Homework Equations F=kQ1Q2/r^2 The Attempt at a Solution I really don't know where to go from here since i don't know the charge of the proton...

Universal mass <<<< than a proton? Of all the models and theories that are being tossed about as fact, the one that I have the most trouble with is that: prior to the Big Bang, ALL mass...the Dark Energy, Dark Matter, and the mere 5% that comprises all the visible structures...stars...

Relativity question, photon and proton... Homework Statement Proton of gamma factor 10^12 and a photon set off from one side of our galaxy to the other take the distance to be 9.3x10^20m. What is the time interval that the photon precedes the proton?Homework Equations \gamma =...

Hello, When neutrons hit materials, it can cause them to degrade and crack. The way this is measured is in displacements per atom. The equation for this effect is the following: Displacements per atom = neutron flux * time * materials cross section (@ that neutron energy) Cracks...

I can't figure out how aromatic substituents effect aromatic rings. I can think of it in a couple ways: Is the group ortho or meta directing? When we learned about aromatic electrophilic substitution, we obviously learned about these groups. When an aromatic proton is lost, it will be...

Homework Statement So this was a little acid-base reaction that ended up showing up on my quiz. I'm just not sure how to pick out the hydrogen in the group that is the most acidic. I wrote it as being the hydrogen that was attached to the carbon with the double bond. Could anyone explain...

Homework Statement An electrically charged wire on the z axis exerts a force on a proton, which moves on the x axis. The initial conditions for the proton position and velocity are: x(0) = x0 and v(0) = 0. The force on the proton is Fx(x) = C /x where C = 3.2×10−15 Nm. (A) Determine the...

Homework Statement An electrically charged wire on the z axis exerts a force on a proton, which moves on the x axis. The initial conditions for the proton position and velocity are: x(0) = x0 and v(0) = 0. The force on the proton is Fx(x) = C /x where C = 3.2×10−15 Nm. (A) Determine...

hi i have a question about nuclear spin if the number of protons and neutrons is even, then my chemistry book says, that the nuclear spin is always zero. i guess that the reason is, that there are always 2 protons and 2 neutrons in one state with opposite spin and therefore the overall...

Instead of electrical current could there ever be a situation where protons or positrons are made to flow as a current?

Homework Statement As shown in the figure below, a proton moves in the +x direction with speed v and is immersed in both, a uniform magnetic field, B, oriented in the -z direction, and a uniform electric field, E (not shown in the diagram). What electric field orientation is required in...

I just derived a little formula of protons moving in a magnetic field. With the symetry etc I have I get this: p = qrB Now I want to calculate the angular as a function like this: p = constant * B Where p is Gev/C, r is in meters. I don't know what numbers or better what form B and q should...

Homework Statement A proton with a speed of 1.23x104 m/s is moving from ∞ directly towards another proton. Assuming that the second proton is fixed in place, find the position where the moving proton stops momentarily before turning around. Homework Equations Potential Energy - U/q = V...