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A beam of radioactive particles is measured as it shoots through the laboratory. It is found that, on the average, each particle “lives” for a time of 2.0 x 10^(—8) s; after that time, the particle changes to a new form. When at rest in the laboratory, the same particles “live” 0.75 x 10^(—8) s on the average. How fast are the particles in the beam moving? |
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