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A pi-meson has an average lifetime in its own frame of reference of 2.6 x 10-8 seconds. (This is the proper lifetime.) If the meson moves with a...

A pi-meson has an average lifetime in its own frame of reference of 2.6 x 10-8seconds.(This is the proper lifetime.) If the meson moves with a speed of 0.95 c, what is its meanlifetime as measured by an outside observer, and the average distance it travels beforedecaying?

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