mµc2= 207mec2= 105.8 MeV, Eq. 37-52 yields ()21(105.8MeV)(3.136 1)226MeV.Kmcγ=−=−=(c) We write mc= 105.8 MeV/cand apply Eq. 37-41: pmvmccc====γγβµµ3136 10580 9478314...bgbgbgMeV /MeV /which can also be expressed in SI units (p= 1.7 ×10–19kg·m/s). 56. (a) The proper lifetime ∆t0is 2.20 s, and the lifetime measured by clocks in the laboratory (through which the muon is moving at high speed) is
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