Proton Definition and 836 Threads

Homework Statement Homework Equations Ki + Ui = Kf + Uf The Attempt at a Solution I need to find the velocity of the proton when it's 2.3mm's to the right of where it is now. I need to find the acceleration of the proton. I believe that I should use F=ma to do this. The only...

Electrons have no known substructure, right? ...And they have a negative charge. Protons have known substructures...and protons have a positive charge. From whence does the positive charge of a proton arise, if not from the charges of a proton's substructures per se (in the way an ion has...

I am attempting to identify an organic "mystery compound." Having run both IR and mass spectrometry, I conjecture that the compound has a molecular mass of ~130 amu and possesses at least one -OH group. C8H18O fits this profile nicely, but no isomers of which I can conceive are commensurate...

How much energy must a photon have if it is to have the same momentum of a 10-MeV proton? I am not sure how to go about starting this one. Can someone help me out?

Homework Statement Find the electric potential a distance of .5 x 10^-10 m from the proton of a hydrogen atom Homework Equations V= kQ/r The Attempt at a Solution I know how to answer the question, because I know which equation to use. What I do not understand is, where the...

I would have thought this standard crackpottery, but evidently it won "Best New Paper" from the University of Liege in Belgium! What do you all think? http://www.theresonanceproject.org/pdf/schwarzschild_proton_a4.pdf I can't find anything about the "quantum vacuum density" he talks...

Homework Statement Ok guys, this problem has a few steps to it, and id appreciate any help I can get. Ok, so beam of electrons moving left, positive particles with same but opposite charge moving right, both moving at 1x10^8 m/s. Then there is a proton moving left on top of the beam nearby...

Homework Statement A 66.0-cm-diameter cyclotron uses a 530 V oscillating potential difference between the dees. How many revolutions does the proton make before leaving the cyclotron? Homework Equations f = (q*B)/(2*pi*m) The Attempt at a Solution I find the cyclotron frequency: f =...

[b]1. According to the "Solar model" of a single ionized Helium atom has one electron revolving in a circular orbit around a stationary nucleus made of two protons and two newtrons. The diameter of this atom is .95*10^-10m. Use Coulomb's law and calculate the speed of the electron (m/s) in its...

Does the existence of the proton neccessitate the existence of the electron? I think it is strange that the number of electrons is exactly equal to the number of protons at every event level of the universe.

Homework Statement Assume that Earth’s magnetic field is every- where perpendicular to the path of a proton and that Earth’s magnetic field has an inten- sity of 4.19 × 10−8 T. What speed would a proton need to achieve in order to circle Earth 1550.0 km above the magnetic equator...

Homework Statement Assume the Earth’s magnetic dipole moment is aligned with the Earth’s rotational axis, and the Earth’s magnetic field is cylindrically symmetric (like an ideal bar magnetic). What speed would a proton need to orbit in an exact circle around the Earth at a height of 476...

Homework Statement A proton with mass 1.67 X 10-27 kg that has a speed of 5.0 x10[6] m/s passes through a metal film of thickness .010 mm and emerges with a speed of 2.0 x 10[6]m/s. How large an average force opposed its motion through the film? Homework Equations I'm thinking Newtons...

Homework Statement An electron of speed v enters a region of magnetic field B directed normally to its velocity and is deflected into a circular path. Find an expression for the number of revolutions per second the electron will make. If the electron is replaced by a proton, how does your...

hi guys I am new to this forum so this is my first post would appriciete some help with this problem Homework Statement in a colliding beam experiment, in a laboratory frame equal and opposite velocity proton beams collide. the relative velocity of the beams is 2.99 x 10^8 m/s, calculate...

I'm having some trouble grasping what it means for something to conduct ions. A material is ion-conducting, transporting hydrogen ions (protons, essentially), but electronically insultating? For something to conduct current, it is ultimately nothing more than a flow of charge and, I recall...

How can quantum mechanics propose an explanation of the mass and charge of the proton using particles with partial charges and guessed at mass but ignore the mass and charge of the electron?

Homework Statement A proton of mass m, and charge q is in a box that contains an electric field E, and the box is located in Earth's magnetic field BEarth. The proton moves with an initial velocity v vertically upward from the surface of Earth. Assume gravity is negligible. a. Indicate...

Homework Statement Three proton decays per cubic kilometer of water per year are detected by an array of photomultipliers immersed in the sea. Find the mean lifetime of the proton. Homework Equations t = 1 / lambda The Attempt at a Solution How is it possible to work this out...

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...

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) The...

[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...

Homework Statement You have a summer intern position at a laboratory that uses high speed proton beam. The protons exit the machine at a speed of 2.0*10^6 m/s [...] You decide to slow the protons to an acceptable speed (2.0*10^5 m/s), then let them hit a target. you take two metal plates...

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...