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A particle lives for a little time before breaking apart into other particles. Assume it is moving at a speed of 0.984c, and an observer who is stationary in a laboratory measures the particle's life time to be 3.00 x 10-8 s.
(a) Find the life time according to a hypothetical man who is riding along with the particle?
s
(b) According to this hypothetical man, find how far does the laboratory move before the particle breaks apart?
m
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