A Pion Is an Unstable Particle That Has a Mean

question 91

Multiple Choice

A pion is an unstable particle that has a mean lifetime of 2.55 × 10^-8 s.This is the time interval between its creation in a nuclear process and its extinction into decay products,as measured in a frame of reference at rest with respect to the pion.An average pion is traveling at 0.230c relative to Earth.How far does it travel in its lifetime,relative to Earth?

• A)2.07 m
• B)1.81 m
• C)2.23 m
• D)3.22 m
• E)3.50 m

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