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26. A radioactive material initially is observed to have anactivity of 1 000 decays/sec. If three hours later it is observedto have an activity of 125 decays/sec, what is its half-life?
a. 1/2 hour b. 1 hour c. 3 hours d. 8 hours

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Elin Hessel
Elin HesselLv2
10 Aug 2019

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

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