Gonitzoggoβ
Life of Pion
If a charged pion that decays in $10^{-8}$second in its own reference frame is to travel $30$ meters in the laboratory before decaying, what should be its speed in $m/s$?
Relativity
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If a charged pion that decays in $10^{-8}$second in its own reference frame is to travel $30$ meters in the laboratory before decaying, what should be its speed in $m/s$?