An unstable particle called a positive pion (pronounced "pie-on") decays in an average time of 2.6 X 10^-8 s.?
an unstable particle called a positive pion (pronounced "pie-on") decays in an average time of 2.6 X 10^-8 s. on average, how long will a positive pion last if it is traveling at 95 % of the speed of light?
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