1. The problem statement, all variables and given/known data An Omega- particle has rest energy 1672 MeV and mean lifetime 8.2X10-11 s. It is created and decays in a particle track detector and leaves a track 24mm long. What is the total energy of the Omega- particle? 2. Relevant equations E=E0/Sqrt(1-v^2/c^2) E0=1672 MeV Lorrentz Equations 3. The attempt at a solution I took the distance and divided by time and found the V would be .967c. Once that was used to then find E. The answer was off. The correct answer was 2330 MeV. I don't know how they got that. My answer was 7678 MeV.