Explanation Write the expression to obtain the value of the decay constant. λ = ln 2 T 1 / 2 Here, λ is the decay constant and T 1 / 2 is the half life of the sample. Assume that the age of the fossils is much smaller than the half life. Write the expression to obtain the age of the fossils. Δ t = ( N Sr N Rb ) 1 λ Here, Δ t is the age of fossils, λ is the decay constant, N Sr / N Rb is the ratio of S 38 87 r to R 37 87 b . Substitute ln 2 T 1 / 2 for λ in the above equation. Δ t = ( N Sr N Rb ) 1 ( ln 2 T 1 / 2 ) = ( N Sr N Rb ) ( T 1 / 2 ln 2 ) Conclusion: Substitute 0

Physics for Scientists and Engineers with Modern Physics

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ISBN: 9780131495081

Author: Douglas C. Giancoli

Publisher: Addison-Wesley

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Chapter 41, Problem 56P

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The age of the fossils.

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Chapter 41, Problem 55P

Chapter 41, Problem 57P

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Physics for Scientists and Engineers with Modern Physics

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