Sustainable Energy
Sustainable Energy
2nd Edition
ISBN: 9781337551663
Author: DUNLAP, Richard A.
Publisher: Cengage,
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Chapter 5, Problem 3P

A sample of 137Cs (half-life = 30.1 years) decays at a rate of 1010 decays per second. How long will it take the decay rate to decrease to 107 decays per second?

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