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A pion initially at rest decays into a muon plus a neutrino which move in opposite...

A pion initially at rest decays into a muon plus a neutrino which move in opposite directions. The pion rest mass is 140 MeV/c2and the muon rest mass is 106 MeV/c2. For the sake of this problem assume that the neutrino is massless and follows the appropriate relations for massless particles. a)What is the speedof the muon? b)What are the energies of the muon and the neutrino?

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