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Flashcards

particles

Mohamed Essa Physics A level English 49 cards

particles

Cards in this deck (49)

  1. 1In the atom which force keeps the electrons in the atom?there is an electrostatic force of attraction between the electron and the nucleus
  2. 2define isotopes?atoms which have the same number of protons and different number of neutrons in the nucleus
  3. 3label a nuclide notationlabel a nuclide notation
  4. 4formula for specific chargecharge / mass
    unit is Ckg^-1
  5. 5which particle has the largest specific charge?electron
  6. 6what keeps the protons and neutrons in the nucleus?The strong nuclear force because it overcomes the electrostatic force of repulsion between the protons in the nucleus and keeps the protons and neutrons together.
  7. 7what the diameter of a small nucleus?1 Fm
  8. 8tell me about the strong nuclear force?* if the separations of the nucleons are less than 0.5 Fm the strong nuclear force acts repulsive
    * if its range is no more than from 0.5 to 3-4 Fm the strong nuclear force becomes attractive
  9. 9particles relative massProton 1
    Neutron 1
    Electron 0.0005
  10. 10the range for electromagnetic repulsive forceits range is infinite
  11. 11graph of the strong nuclear force and electromagnetic forcegraph of the strong nuclear force and electromagnetic force
  12. 12alpha radiation decay equationalpha radiation decay equation
  13. 13beta minus decay equationbeta minus decay equation
  14. 14Two objects that produce neutrinosthe sun emits neutrinos and beta plus decay
  15. 15what is gamma radiationits an electromagnetic radiation emitted by an unstable nucleus. it is uncharged and its emitted by a nucleus with too much energy.
  16. 16formula for wavelengthformula for wavelength
  17. 17define a photoneach photon is a wave packet of electromagnetic radiation. the energy of a photon is E= h x f
  18. 18Formula for photon energyFormula for photon energy
  19. 19formula for power of the beampower of the beam= n x h xf
  20. 20define anti matterantiparticles that each have the same rest mass, if charged have equal and opposite charge to its corresponding particle.
  21. 21beta plus decay equationbeta plus decay equation
  22. 22when does beta minus decay take place?when a neutron changes into proton in an unstable nucleus with a neutron rich nucleus
  23. 23when does beta plus decay take place?when a proton changes into a neutron in an unstable necleus that is proton rich.
  24. 24when does annihilation occur?annihilation occurs when a particle and a corresponding antiparticle meet and their mass is converted into 2 gamma photons. the momentum before is 0 and the momentum after is 0 ( this is why the 2 gamma photons are produced
  25. 25can anti-atom be formedyes mate
  26. 26for annihilation what is the formula for the minimum energy of each photon produced?rest mass = h x f min
  27. 27how does pair production occur?when a gamma photon creates a particle and its corresponding antiparticle and vanishes in the process.
  28. 28For pair production what is the formula for the minimum energy of a photon needed ?2 rest mass = h x f min
  29. 29what is the exchange particle of the weak nuclear force?w bosons which are charged, have a non- zero rest mass and have a short range.
  30. 30explain electron capturea proton in proton-rich nuclei turns into a neutron as a result of interacting through the weak interaction with an inner shell electron from outside the nucleus. a neutrino is emitted
    proton + electron -> neutron + ve
    exchange particle is a +w boson to the right
  31. 31which w boson decays into which beta decay?* the - w boson decays into beta minus decay
    *the + w boson decays into the beta plus decay
  32. 32how can we find new particlesusing accelerators that collide protons head-on with each other at high speed.
  33. 33what can a kaon decay into?a pion and other particles.
    they interact through the strong interaction
    they decay via the weak interaction.
  34. 34what can pions decay into* + pion decays into a anti-muon and an neutrion
    * - pion decays into a muon and anti- muon
    * 0 pion decays into high energy photons
  35. 35what does muon decay into* - muon decays into and electron and antineutrino
    * + muon decays into a positron and a neutrino
  36. 36which interactions does a kaon decay viathe weak interaction
  37. 37what are hadronsThe interact through strong interaction and through the electromagnetic interaction if charged.
    apart from proton which is stable hadrons tend to decay through the weak force.
  38. 38leptonsdon't interact through strong interactions.
    interact via electromagnetic if charged.
  39. 39proton quark compostionuud
  40. 40neutron compositionudd
  41. 41what is sigma particlea baryon that contains a strange quark
  42. 42what are baryonsare protons and other hadrons that decay into protons.
    have 3 quarks or 3 anti quarks
  43. 43measonsare hadrons that dont include a proton in their decay. have a quark and anti quark
  44. 44formula for rest energy of the products= total energy before - the KE of the products
  45. 45what is electron-proton collisionwhen an electron collides at high speed with a proton.
    proton + electron -> neutron + Ve
    exchange particle -w boson to the left
  46. 46what is electromagnetic repulsionwhen two particles of equal charge e close to each other they repel.
  47. 47specific charge of an ionelectron removed charge / mass of the atom
  48. 48strong interaction exchange particleis a gluon
  49. 49in what interaction is strangeness conserved and not conservedits conserved in the strong interaction
    not conserved in the weak interaction.,

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A level Physics (Particles) Flashcards on particles, created by Mohamed Essa on 03/04/2017.
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Mohamed Essa
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