Proton Definition and 813 Threads

Homework Statement A proton moves perpendicularly to a magnetic field that has a magnitude of 6.48x10-2T. A magnetic force of 7.16x10-14N is acting on it. If the proton moves a total distance of 0.500m in the magnetic field, how long does it take for the proton to move across the magnetic...

proton mass 938MeV/c^2. Consider an elastic collision between two protons. IN the centre of mass frame the kinetic energy of each proton is equal to its rest energy. calculate the speed of the protons in the CM frame. clearly they will be equal and opposite velocities so the two speeds...

Homework Statement A proton moves through a uniform magnetic field given by =(6.97-9.54+35.0) mT. At time t1, the proton has a velocity given by =vx+vy+(1.58 km/s) and the magnetic force on the proton is FB=(4.72 X 10-17N)+(3.45 X 10-17N). (a) At that instant, what is vx? (b) At that...

Homework Statement A photon and alpha particle are accelerated from rest through the same potential difference. After acceleration what is the ratio kinetic energy of alpha particle / kinetic energy of proton? Homework Equations I guess I have to use eV = 1/2mv^2 The Attempt at a...

What force and acceleration would a proton experience if it has a velocity of 2. 106 m/s perpendicular to a magnetic field of 2.0 T? force: ________ N acceleration: _______ m/s2 Homework Equations F = ma Frictional force = uk(n) Acceleration=force divided by mass.

I thought that the hydrogen nucleus is just a single proton. So why does this page mention "electorns, protons, hydrogen nuclii", etc? http://blogs.discovermagazine.com/badastronomy/2009/04/07/hot-light-from-a-cold-comet/

Homework Statement Knowing that the wave function of the hydrogen atom is proportional to e-r/a0, estimate how t depends on the proton proton separation d. I need just to make a drawing of the integrand and make a reasonal approximation using my intuition (no numerical methods allowed to...

Do they just destroy each other?

when an electron moves closer to the electric field source, does the potential energy get higher or lower? if it is being accelerated from the infinity, then at the infinity it should have the lowest kinetic energy? then when it is closer to the source of the field, it should have the...

Homework Statement At a particular instant a proton is traveling in the +z direction, with speed 4105 m/s. At the location of the proton there is a magnetic field of magnitude 0.25 T in the +x direction, due to current running in a nearby coil. what is the direction and magnitude of force on...

Homework Statement a) State the law of conservation of linear momentum. b) A proton of mass 1.6*10-27kg traveling with a velocity of 3*107ms-1 collides with a nucleus of an oxygen atom of mass 2.56*10-26kg (which may be assumed to be at rest initially) and rebounds in a direction at 90 degrees...

Homework Statement a 5.0 mm-diameter proton beam carries a total current of 1.5mA. the current density in the proton beam, which increases with distance from the center, is given by j=j(edge)(r/R), where R is the radius of the beam and j(edge) is the current density at the edge. a) how many...

Homework Statement Find the maximum accuracy that can be found to a proton's position without changing it's (not-realativistic) kinetic energy by more that 1 keV I think this involves Heisenberg's uncertainty principle \Delta x\Delta p=hbar/2 but I am not sure at all. Now to find the...

Protons and neutrons have a diameter of around 10^{-15}m. Despite this small size, physicists were able first to probe inside these particles in the 1970s, by scattering high energy electrons off them. i). explain briefly why it is important that the electrons have high energy. Since...

[SIZE="5"]SOLVED Homework Statement A proton is fired horizontally with a speed of 1.1 106 m/s through the parallel-plate capacitor shown in Figure P34.37. The capacitor's electric field is = (1.3 105 V/m, down) and the distance between the plates is 31 millimeter. (Image Attached)...

[b]1. A proton has a mass 1.7x10^-27 kg and its speed is v=.969c. When an electric force acts on the proton and does 5.8x10^-9 J of work on the particle, what are the following values? A) Particle energy B) Particle Rest Energy C) Particle Momentum D) Particle Beta [b]2. Particle...

Hi everybody When fast neutrons hit isolated protons (eg. hydrogen cores in paraffin) the neutrons kinetic energy is transferred to the proton (as they have aproximatly the same mass), which is detectable by a geiger counter, while the neutron is stoped. Thats how far I got after several...

1. There is an electric field with two plates, one positive one negative, having a distance of 4.5x10-3 metres apart producing a charge of 200N/C. How long would it take a free moving proton to travel from the positive plate to the negatively charged plate? 2. ? 3. I solved for voltage...

A proton (m=1.67x10^-27 kg) that has a speed of 5.0x10^6 m/s passes through a metal film of thickness 0.010mm and emerges with a speed of 2.0x10^6 m/s. How large an average force opposed its motion through the film?? can anybody give me a clue on where i can start?

In Antimatter production in a labratory, does anyone know the principle element used to generate antimatter such as anti-protons?

Homework Statement A proton (mass m = 1.67x10^-27 kg) is being accelerated along a straight line at 2.0x10^15 m/s^2 in a machine. The proton has an initial speed of 2.4x10^7 m/s and travels 2.5 cm. (a) What is its speed? (b) What is the increase in its kinetic energy? The Attempt at a...

As I understand it, it can be calculated that 1 minute after the big bang, when protons and neutrons freeze out and are no longer being created, that for every neutron that exists there are 7 protons. Does anyone know what equation is used to calculate this and if it is not a equation that is...

Homework Statement No real problem statement, just a question. I was reading through my textbook and found this statement: "A positive charge slows down as it moves into a region of higher, more positive potential." I spend some time thinking about it and I can't figure out why... does...

I was told that if there is a wavefunction containing a proton and a neutron that it must be anti-symmetric under exchange of a proton and a neutron. I am having trouble understanding this. The short handwavy explanation is that they are indistinguishable via the color force. What bothers...

Homework Statement Determine the speed of a proton whose kinetic energy is 500 MeV. The mass of a proton is 938.27 MeV/c2. Homework Equations K = (1/2)mv2?? The Attempt at a Solution The correct answer is supposed to be 0.758c, where c is the speed of light. Of course, I plugged...

Homework Statement A magnetic field of 0.1 T forces a proton beam of 1.5 mA to move in a circle of radius 0.1 m. The plane of the circle is perpendicular to the magnetic field. Of the following, which is the best estimate of the work W done by the magnetic field on the protons during one...

"Stopping the Proton" Homework Statement An infinitely long line of charge has a linear charge density of 8.00×10−12 C/m. A proton is at distance 14.0 cm from the line and is moving directly toward the line with speed 1500 m/s. I just want a better understanding of this statement: "An...

Homework Statement Given: in its own reference frame a proton takes 5 minutes to cross the Milky Way (10^5 meters). (a) What is the approximate energy of the proton? (b) About how long would the proton take to cross the galaxy as measured by an observer in the galaxy's reference frame...

Homework Statement A proton traveling at a speed 1.0*106 m/s of enters the gap between the plates of a 2.0-cm-wide parallel-plate capacitor. The surface charge densities on the plates are 1*10^-6 C/m2. How far has the proton been deflected sideways when it reaches the far edge of the...

Homework Statement If a proton is considered a uniform ball of charge of radius 1.0x10-15m, what is the electric field just beyond its surface? Homework Equations Gauss's law? The Attempt at a Solution I followed a problem in the book that found an equation for the...

Homework Statement A proton is fired from far away towards the nucleus of a mercury atom. Mercury is element number 80, and the diameter of the nucleus is 14.0 fm. If the proton is fired at a speed of 32100000 m/s, what is its closest approach to the surface of the nucleus (in fm)? Assume that...

Homework Statement "The plate separation of a charged capacitor is 0.0800 m. A proton and an electron are released from rest at the midpoint between the plates. Ignore the attraction between the two particles, and determine how far the proton has traveled by the time the electron strikes the...

Is this reaction possible , i mean bombarding a 1H target with an electron to form a neutron that's all what i want to know

Traveling at an initial speed of 1.5x10^6m/s, a proton enters a region of constant magnetic field of magnitude 1.5T. If the proton's initial velocity vector makes an angle of 30 deg with the magnetic field, what is the proton's speed 4s after entering the magnetic field? Not sure what...

Homework Statement In an elastic collision between a proton and a helium nucleus at rest, the proton was scattered through an angle of 45 degrees. What proportion of its initial energy did it lose? what was the recoil angle of the helium nucleus? Homework Equations...

Where EXACTLY is the "Mass" of an Atom? Proton? Quark? Hadron? Gluon?? Just look at the simplest Hydrogen atom -- one Proton. The question is *where* exactly is the mass of this thing? Or *what* makes up the mass of this thing? Is it just Quarks? So where is the *mass* of those things? Where is...

Why doesn’t the Electron crash into the proton?? We know in an H atom the e- is attracted to the + charge of the proton. And it wants to get down to the "0 level" orbit. But what makes that level zero – or why does e- stop going down? Is there another force that counteracts the force of charge...

Here is a beta decay related question: Masses are from Particle Data Group (http://pdg.lbl.gov/2008/listings/contents_listings.html) Neutron has udd quarks. Mass is approximately 2.5, 5, 5 MeV. Total 12.5 MeV Products are: 1. Proton. uud quarks. Mass approx 2.5, 2.5, 5 MeV 2. Electron...

need help, I'm reading that W bosons are 80 GeV, but they are components of protons of ~1 GEV. Makes no sense. Is the 80 GeV the mass/energy of the particle if it is outside the proton? If so what is the mass/energy as a transfer particle within the proton. If you subtract the mass...

Hello! I have a very interesting question, whose answer I have not yet been able to find out. Now, according to The Standard Model there are three generations of matter, therefore three generations of quarks also. Generations of Quarks: 1st: up (u) & down (d) 2nd: charming (c) &...

Homework Statement An electron moves to the right with a speed of 0.90c relative to the laboratory frame. A proton moves to the left with a speed of 0.70c relative to the electron. Find the speed of the proton relative to the laboratory frame. Homework Equations Vx'=[Vx-V]/[1+(v2/c2)*Vx]...

Homework Statement A beam of protons with v=1.8x10^8 are deflected 90 degrees by a constant magnetic field. The trajectory of the beam has a circular arc with a radius of 4m. I am asked to find the magnitude of the constant magnetic field. Homework Equations I know that r=mv/eB. When...

Homework Statement http://session.masteringphysics.com/problemAsset/1020825/7/jfk.Figure.21.P56.jpg A proton's speed as it passes point A is 4.40×10^4 m/s. It follows the trajectory shown in the figure. What is the proton's speed at point B? Homework Equations Knowing this would be...

Hey I was just wondering anyone knew the mechanisim (specific if you got it) by which they create the antiprotons for say use at the LHC. Cheers -G

1. The distance between the electron and proton in a hydrogen atom is 5.3 x10^-11m. Find the speed of the electron as it orbits the proton. 2. I know how to work this thing out, I'm just having trouble getting started, my free body diagram for the electron (assuming the electron is on the...

What is wrong with this inductive proof that all protrons have the same mass? 1. if you have one protron then it obviously has mass A 2. Assume that it is true for a set of n protrons, i.e. that any set of n protrons has the mass n*A. 3. Now look at a set of n+1 protrons, remove one then it...

Homework Statement Find the radius of the circular path described by a proton moving at 15 in a plane perpendicular to a 400- magnetic field. Homework Equations I used the Eqn: r=mv/qB So (1.67e-27)(15ooom/s)/(1.60e-19)(400) and I go 6.265e-2 m but the answer is in mm so I...

Hello there! I'm new to the forums. It seems like a lot of very knowledgeable people are here. I have my first question. How can the question below be solved? Thank you for your help.How much work is needed to assemble an atomic nucleus containing three protons (such as Be) if we model it as...

Homework Statement The plate separation of a charged capacitor is 0.0800 m. A proton and an electron are released from rest at the midpoint between the plates. Ignore the attraction between the two particles, and determine how far the proton has traveled by the time the electron strikes the...

After some learning on atomic physics, I came with the following question. Proton mass is 1.67262158 × 10E-27 kilograms, and its velocity is proportional to its energy. So then, in E=mc^2, you only plug the m, and you will always get the same value. I don't quite understand that a proton...