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A Beam of Unstable Neutral Pions Is Observed to Travel ×\times

Question 55

Multiple Choice

A beam of unstable neutral pions is observed to travel on average 8 m before they decay.If their proper lifetime is 0.8 ×\times 10-8 s,then calculate how fast the beam is traveling.


A) 0.96c
B) 0.92c
C) 0.29c
D) 0.98c
E) 3.5c

Correct Answer:

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