The half-life of Cs-137 is 30.2 years. On a certain day, the activity of a Cs-137 sample is 100.6 Ci. What is its activity 20.5 years later? And how long does it take for the sample to reduce its activity to 4.5 Ci?
The half-life of Cs-137 is 30.2 years. On a certain day, the activity of a Cs-137 sample is100.6 Ci. What is its activity 20.5 years later? And how long does it take for the sample toreduce its activity to 4.5 Ci?