Giancoli 7th Edition textbook cover
Giancoli's Physics: Principles with Applications, 7th Edition
30
Nuclear Physics and Radioactivity
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30-1: Nuclear Properties
30-2: Binding Energy
30-3 to 30-7: Radioactive Decay
30-8 to 30-11: Half-Life, Decay Rates, Decay Series, Dating

Question by Giancoli, Douglas C., Physics: Principles with Applications, 7th Ed., ©2014, Reprinted by permission of Pearson Education Inc., New York.
Problem 39
Q

A radioactive material produces 1120 decays per minute at one time, and 3.6 h later produces 140 decays per minute. What is its half-life?

A
1.2 hr1.2 \textrm{ hr}
Giancoli 7th Edition, Chapter 30, Problem 39 solution video poster
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