A pion lives 26 ns in its rest frame, but an observer in a laboratory in which the particle moves at a speed of 2.7 × 10⁸m/s says the particle lived A) 11 ns. B) 15 ns. C) 43 ns. D) 60 ns. E) 79 ns.

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The Answer of A pion lives 26 ns in its rest frame, but an observer in a laboratory in which the particle moves at a speed of 2.7 × 10⁸m/s says the particle lived A) 11 ns. B) 15 ns. C) 43 ns. D) 60 ns. E) 79 ns.

A Pion Lives 26 Ns in Its Rest Frame, but an Observer