Proton Definition and 813 Threads

  1. K

    Work performed on a proton between two charged plates

    Homework Statement A set of parallel conducting plates are separated by .05 m. When the plates are fully charged to a potential difference of 20 V, how much work would have to be performed to move a proton from the negatively charged plate to the positively charged plate? My second question...
  2. L

    Calculate INERTIAL MASS of proton traveling close to speed of light

    Homework Statement A proton is traveling with a speed of v = 2.993x108 m/s. Calculate the value of the inertial mass for this proton. Assume that the speed of light is c = 3.000 x 108 m/s and that the mass of the proton is 1.673 x 10-27 kg. [SIZE="1"]Note: Do your calculations to 4...
  3. L

    Calculate KINETIC ENERGY of proton traveling close to speed of light

    Homework Statement A proton is traveling with a speed of v = 2.990x108 m/s. Calculate the (relativistically correct) value of the kinetic energy for this proton. Assume that the speed of light is c = 3.000 x 108 m/s and that the mass of the proton is 1.673 x 10-27 kg. [SIZE="1"]Note...
  4. P

    Proton in a plate capacitor: how far does it go?

    1. Homework Statement A proton traveling at a speed of 7.22 *106m/s enter the gap between the plates of a 7.86 cm wide parallel plate capacitor. The surface charge densities on the plate are ± 4.98 *10-6 C/m2. How far (in m) has the proton deflected sideways when it reaches the far edge of...
  5. J

    Membranes, proton pump/ cotransport

    Homework Statement Why do diarrhea patients receive a solution containing a high concentration of glucose and salt?
  6. M

    Proton passes parallel conducting plates

    A proton is shown to pass between two parallel conducting plates across which a steady potential difference is maintained. Its path curves upwards. An alpha particle enters at the same point with the same velocity as the proton. Add its path to the diagram. Why is it like this. The path is...
  7. S

    How Does the Fermi Energy of Bare Protons Influence Chemical Reactions?

    As I know chemical potential of two reacting substances strongly depends on difference in Fermi energy between them. Fermi energy is inversely proportional to the mass of particles. Does that mean that Fermi energy of bare proton will be 2000 time smaller than that of electron? Usually...
  8. T

    Calculate the kinematic threshold energy of a proton

    Homework Statement Given the reactions: p + 9 Be --> 10B + "gamma" p + 9 Be --> 9B + 1n p + 9 Be --> 9Be + 1p p + 9 Be --> 8Be + 2H p + 9 Be --> 7Be + 3H p + 9 Be --> 6Li + 4He Calculate: a) Q-value b) kinematic threshold energy of the proton...
  9. M

    How Is Energy Distributed in the N-14 and Alpha Particle Reaction?

    N-14 + alpha --> O-17 + proton N-14 + alpha particle --> O-17 + high energy proton alpha particle used was 7.70MeV. Q1. Calculate the energy to be shared in the interaction. Q2. Explain why the proton cannot take all of the available energy. The following date is given for...
  10. M

    B meson from proton antiproton collision

    The B+ particle and B- particle are produced by higher energy collisions between protion and anti protons. The B meson has a mass of 5.28 GeV/c^2. The proton has mass 938 MeV/c^2. Calculate the min KE of the proton neccesary for a B+ B- pair to be produced from a proton anti-proton head on...
  11. E

    Has proton decay falsified SO(10) GUT?

    I know that proton decay has falsified SU(5) based around 10e30 years. What proton decay of SO(10)? Are SUSY SU(5) and SUSY SO(10) still viable? If the experiment continues with a null result, what models are next in line to be falsified? Could protons last forever and thus falsfy...
  12. E

    Schwarzschild Proton: Thoughts & Paper Review

    What are everyones thoughts? Just google the paper if you havn't read it yet.
  13. P

    Scattering of a Neutron and Proton

    I have a problem here that has me a bit suck: In scattering between incident neutrons and target protons at rest, show that the angle between the two scattered particles is always 90 degrees. I have set up the conservation of energy and momentum equations and have: Energy: Tn=T'n+Tp...
  14. J

    Finding F(q) for a Uniform Spherical Charge Model of the Proton

    Here is the problem: Use the fact that the form factor, F(q), is the Fourier transform of the normalised charge distribution \rho(r), which in the spherically symmetric case gives F(q) = \int \frac{4\pi \hbar r}{q}\rho(r) sin(qr/\hbar))dr to find an expression for F(q) for a simple...
  15. W

    Calculating Proton Decay in a Swimming Pool

    Homework Statement Grand unification theories predict that the proton has a long but finite lifetime. Current experiments based on detecting the decay of protons in water infer that this lifetime is at least 10^32 years. Assume 10^32 years is, in fact, the mean lifetime of the proton...
  16. R

    Future of the universe without proton decay.

    How will the future of the universe be if proton decay does not occur? Does it mean that the degenerate era will last longer?
  17. J

    What is the velocity of a proton with an energy of 0.12 keV?

    Homework Statement Calculate the veolcity of a proton of energy 0.12 keV proton mass = 1.7 x 10^-27 Homework Equations The Attempt at a Solution I thought... 0.12 keV = 120 eV 120/1.60 x 10^-19 = 7.5 x 10^20 J E = 0.5mv^2 sqrt(2E/m) = v but I'm getting something to x 10^23 so its...
  18. Q

    What is the significance of the proton-deuteron fusion reaction in stars?

    Homework Statement One of the thermonuclear or fusion reactions that takes place inside a star such as our Sun is the production of helium-3 (3He, with two protons and one neutron) and a gamma ray (high-energy photon, denoted by the lowercase Greek letter gamma, ) in a collision between a...
  19. W

    Proton mobility vs. conductance in ice

    Greetings, I'm trying to understand how protons might move through solid water ice. More specifically this concerns how deuterium/hydrogen ratios are used to date ice core samples drilled into glaciers. On one hand I am told that, once it is deposited from the atmosphere in the form of...
  20. C

    Calculating v/c of a proton and electron

    Homework Statement Calculate the speed parameter v/c of a particle with a momentum of 12.5 MeV/c if the paricle is proton Homework Equations E_{}2 = m_{}2c_{}4 + p_{}2c_{}2 [b]3. The Attempt at a Solution Btw, the numbers above are powers. Ok, so i followed what my...
  21. T

    Proton and magnetic field question to see if i got the answers right?

    hey i just need to know if these answers are right i think i got it hopefully A proton of mass 1.67 x 10-27 kg is fired with a velocity of 1000 ms-1, into a uniform magnetic field of 2.00 T where the velocity and magnetic field are at right angles. (a) What is the magnitude and...
  22. A

    Proton Bombardment Work and Energy

    Homework Statement A proton with mass 1.67 x 10^-27 kg is propelled at an initial speed of 3.00x10^5 m/s directly toward a uranium nucleus 5.00 away. The proton is repelled by the uranium nucleus with a force of magnitude F=α/x^2, where x is the separation between the two objects and α =...
  23. C

    A Proton is Accelerated Through What Voltage?

    A metal target sphere of 30 cm diameter suspended out in space is given a charge of +1.00 nC. Through what voltage must a distant proton be accelerated from rest (by some sort of space weapon) if it is to arrive at the sphere at a speed of 8.2*10^4 m/s? (Neglect any gravitational effects.)...
  24. scupydog

    Heavy Hydrogen: Proton, Muon/Tauon - Stability?

    A hydrogen atom is consists of a proton (uud quarks) and an electron. Is there a heavier atom of hydrogen that consists of a type of proton (ccs or ttb quarks) and a muon or tauon respectively? Are these
  25. C

    Voltage Needed for a Proton to Arrive at Sphere at A Certain Speed

    A metal target sphere of 30 cm diameter suspended out in space is given a charge of +1.00 nC. Through what voltage must a distant proton be accelerated from rest (by some sort of space weapon) if it is to arrive at the sphere at a speed of 8.2*10^4 m/s? (Neglect any gravitational effects.) V=...
  26. S

    Do electron attract proton, or proton attract electron?

    I know they are strongly attract each other, but which one will attract first? is it depend on the mass of proton and electron? if yes, then it would be electron attract to the proton, am I right?
  27. M

    Where should the proton be placed to balance F?

    Homework Statement A point charge q = -0.5nC is fixed at the origin. Where must a proton be placed in order for the electrical force acting on it to be exactly opposite its weight? Homework Equations F= k(q1)(q2) ------------ r^2 The Attempt at a Solution Trying to...
  28. P

    How can I find the velocity of a proton?

    Homework Statement A charged particle (either an electron or a proton) is moving rightward between two parallel charged plates separated by distance d = 2.20 mm. The charge on the left has a potential of -70V and the charge on the right has a potential of -50V. The particle is slowing from...
  29. T

    Uniform electric field and a proton

    Homework Statement A proton moves at 4.50x10^5 m/s in the horizontal direction. It enters a uniform vertical electric field with a magnitude of 9.60x10^3 N/C. Ignoring any gravitational effects, find a) the time interval required for the proton to travel 5.00 cm horizontally b) its vertical...
  30. Z

    An electron with known speed and distance from a proton moving away?

    Homework Statement Suppose that an electron is set down 10e-10 m away from a proton that is "pinned down" so that the proton cannot move. The electron has a velocity V0= 1.6e6 m/s pointing away from the proton, along the line between the proton and the electron. What is the force on this...
  31. M

    Proton is shot away from inf. charged plane

    Homework Statement The surface charge density on an infinite charged plane is -2.6*10^-6 C/m^2. A proton is shot straight away from the plane at 2.2*10^6 m/s. How far does the proton travel before reaching its turning point? Homework Equations Im very unsure of what equations to use, the...
  32. E

    How Do You Calculate Proton Velocity and Acceleration in an Electric Field?

    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...
  33. S

    What is the Source of the Positive Charge of a Proton?

    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...
  34. P

    What Structural Configuration Explains 10 Identical Hydrogens in C8H18O?

    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...
  35. C

    How much energy a photon has to have the momentum of a 10MeV proton

    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?
  36. F

    Calculating Electric Potential of a Proton in Hydrogen Atom

    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...
  37. C

    Interesting paper - The Schwarzschild Proton

    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...
  38. N

    Current / Magnetism Questions: Proton near magnetic field of moving electrons

    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...
  39. M

    How Many Revolutions Does a Proton Make in a Cyclotron?

    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 =...
  40. K

    Need help on how to find distance between electron and proton

    [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...
  41. T

    Existence of the proton necessitate the existence of the electron?

    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.
  42. M

    Proton speed needed to circle the earth

    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...
  43. M

    What speed would a proton need to orbit in an exact circle ?

    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...
  44. S

    Average force opposing a proton

    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...
  45. F

    Finding Revolutions per Second of Electron & Proton in Magnetic Field

    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...
  46. S

    Relativity proton beam relative velocity problem

    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...
  47. A

    How Does Ion Conduction Work in PEMFC and Proton Conductors?

    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...
  48. L

    Explanation of the mass and charge of the proton

    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?
  49. S

    Magentism: Solving Proton Homework Statement

    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...
  50. H

    Find the mean lifetime of the proton

    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...
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