A Muon Has a Mean Lifetime of Only 2

question 34

Multiple Choice

A muon has a mean lifetime of only 2.200 µs in its own rest frame.If it moves with a speed of v = 0.9994 c in a certain reference frame,what is its mean lifetime in that frame?

• A)0.042 µs
• B)2.2 µs
• C)9.99 µs
• D)63.5 µs
• E)4200 µs

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