Relativistic energy Definition and 58 Threads

  1. W

    Relativistic Energy: Calculating Time Difference for Neutrinos from Supernova

    Hey I have a problem concerning relativistic energy One neutrino has an energy of 10 MeV and a rest mass of 10 eV/c^2. Another neutrino has an energy of 30 MeV and a rest mass of 10 eV/c^2. Calculate the difference in time that the two particles arrive at Earth if they are emitted from a...
  2. G

    Relativistic Energy and four momentum

    A particle of initial kinetic energy T[SIZE="1"]0 and rest energy E[SIZE="1"]0 strikes a like particle at rest. The initial particle is scattered at an agle theta to its original direction. Show that the final kinetic energy T is T = T[SIZE="1"]0cos2(theta)/(1+...
  3. B

    How Do Particle Physicists Measure the Relativistic Energy of Tardyons?

    how do we measure the relativistic energy of a tardyon?
  4. S

    Relativistic Energy- well a basic algebraic simplification

    a little rough on this simplification, is this correct? solving for "u" E = mc^2 / (root)(1-u^2/c^2) (root)(1-u^2/c^2) = mc^2/E 1 - u^2/c^2 = (mc^2/E)^2 1 = (mc^2/E)^2 + u^2/c^2 c^2 = (mc^2/E)^2 (c^2) + u^2 -> (sq root everything) u = c - mc^3/E pretty bad i don't...
  5. Z

    Relativistic energy and matter

    all speed are relative to the observer, but if we have 2 planets with inteligent beings and for one of them all the objects in the universe seem to move just a bit slower than the other planet, wouldn't it then be less matter and energy in thge universe for those biengs? and with finite amount...
  6. H

    Relativistic Energy: Explained

    can anyone explain to me wha relativistic is?
  7. A

    Question about relativistic energy

    A pion at rest (m_pi = 273m_e) decays to a muon (mass = 207m_e and an antineutrino (mass = 0). Find the kinetic energy of the muon and the energy of the antineutrino in electron volts. How am I supposed to start this problem? ANy help would be great...thx!
  8. M

    Derivation of relativistic energy

    I am now currently using an introductory modern physics textbook but they did not give me the derivation for relativistic KE for a moving object which is \gamma mc^2 . Is the derivation too difficult to be put in the introductory text?? Anyway, what is its derivation? Thanks alot.
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