An electron, whose mass is 0.511MeV/c is travelling in the x-direction with speed 0.4c. Please give...

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An electron, whose mass is 0.511MeV/c² is travelling in the x-direction with speed 0.4c. Please give all your answers in MeV, MeV/c etc... (a) What is the energy-momentum four vector of the electron, (E/c,pxPy»Pz)? (b) This electron is observed from a spaceship moving at speed v = 0.6c in the same direction as the electron. What is the energy-momentum four vector of the electron as viewed in the frame of reference of the ship (please use Lorentz Transformations). (c) What is the electron's speed in the ship's frame of reference, from the addition of velocities formula? (d) Using the speed you got from part (c), check that your answer in part (b) was correct. An electron, whose mass is 0.511MeV/c² is travelling in the x-direction with speed 0.4c. Please give all your answers in MeV, MeV/c etc... (a) What is the energy-momentum four vector of the electron, (E/c,pxPy»Pz)? (b) This electron is observed from a spaceship moving at speed v = 0.6c in the same direction as the electron. What is the energy-momentum four vector of the electron as viewed in the frame of reference of the ship (please use Lorentz Transformations). (c) What is the electron's speed in the ship's frame of reference, from the addition of velocities formula? (d) Using the speed you got from part (c), check that your answer in part (b) was correct.