| 1. | The average time taken to achieve this is the mean lifetime.
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| 2. | The mean lifetime of your batteries is a fixed number.
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| 3. | In a radioactive decay process, this time constant is also the mean lifetime for decaying atoms.
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| 4. | At the equator it has a mean lifetime of 300 years-but lasts longer if buried.
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| 5. | In fact, a free neutron decays this way, with a mean lifetime of about 15 minutes.
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| 6. | Any one of decay constant, mean lifetime, or half-life is sufficient to characterise the decay.
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| 7. | The muon is an unstable subatomic particle with a mean lifetime of, much longer than many other subatomic particles.
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| 8. | The half-life can be written in terms of the decay constant, or the mean lifetime, as:
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| 9. | So, how can it be that electron's " mean lifetime is 4.6?0 26 years "?
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| 10. | The comparison of those amounts allows for the determination of the mean lifetime as well as the half-life of muons.
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