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A sample of a particular radioisotope is placed near a
Chapter 35, Problem 33TAS(choose chapter or problem)
A sample of a particular radioisotope is placed near a Geiger counter, which is observed to register 160 counts per minute. Eight hours later, the detector counts at a rate of 10 counts per minute. What is the half-life of the material?
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QUESTION:
A sample of a particular radioisotope is placed near a Geiger counter, which is observed to register 160 counts per minute. Eight hours later, the detector counts at a rate of 10 counts per minute. What is the half-life of the material?
ANSWER:Step 1 of 3
The initial activity of the radioactive sample is 160 counts/min
Number of counts detected by Geiger counter in an hour is
Final activity of the radioactive sample is 10 counts /min. convert units of activity from counts/min to counts /hr