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Elementary Particles Average Lifetime

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Part 1

An elementary particle called a pion has an average lifetime of 2.60E-8 s when at rest. If a pion moves with a speed of 0.940 c relative to Earth, calculate the average lifetime of the pion as measured by an observer on Earth.

Part 2

Calculate the average distance traveled by the pion as measured by the same observer.

Part 3

How far would the pion have traveled relative to Earth if relativistic time dilation did not occur?

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The expert examines elementary particles for average lifetimes.

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