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After being created in a high-energy particle accelerator, a pi meson at rest has an average...

After being created in a high-energy particle accelerator, a pi meson at rest has an average lifetime of 2.60 10-8 s. Traveling at a speed very close to the speed of light, a pi meson travels a distance of 148 m before decaying. How fast is it moving? (Enter your answer to four significant figures.)

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