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Particle track detectors are used to measure the speed of particles if the lifetime of the...

Particle track detectors are used to measure the speed of particles if the lifetime of the particle is known. Particle X has a lifetime of 256.2 ps. These particles are created in an experiment inside the detector by a given reaction. The particles leave 20.1 cm long tracks on average before they decay into other particles not observable by the detector.

What is the average speed of the particles in terms of the speed of light?

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Solo lioo! Speed ol potic Po P 256 2 ps B ecause ot tima dicdion obsee le lime : obtained speech; SPeec hdistan 0 20 012 CL

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