modern physics: Relativity, Physics

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A student finds that a particle whose life is micro-sec (µ- sec) moves with a velocity of 2.7 x 108 m/sec.
i) What will be its lifetime as measured by another observer in the laboratory?
ii) What will be the distance traversed by it before disintegration?
iii) What will be the distance traveled if relativity is not considered?

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