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 47
Q

Calculate the mass of a sample of pure 1940K{^{40}_{19}\textrm{K}} with an initial decay rate of 2.4×105 s12.4 \times 10^5 \textrm{ s}^{-1}. The half-life of 1940K{^{40}_{19}\textrm{K}} is 1.248×109 yr1.248 \times 10^9 \textrm{ yr}.

A
0.91 g0.91 \textrm{ g}
Giancoli 7th Edition, Chapter 30, Problem 47 solution video poster
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