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Question: 

A radioactive element undergoes an alpha decay with a lifetime of $12 \; \mu \textrm{s}$. If alpha particles are emitted with 5.5-MeV kinetic energy, find the percent uncertainty $\Delta E/E$ in the particle energy.

Giancoli, Douglas C., Physics: Principles with Applications, 7th Ed., ©2014. Reprinted by permission of Pearson Education Inc., New York.
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Quick Answer: 

$1.0 \times 10^{-17} \%$

Giancoli 7th Edition, Chapter 28, Problem 10

(1:15)

Chapter 28, Problem 10 is solved.

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