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Question 8 Please show all work and necessary formulas. D Question 8 15 pts A physics professor purchased a 137Cs source in September 1990, which

Question 8 Please show all work and necessary formulas.

D Question 8 15 pts A physics professor purchased a 137Cs source in September 1990, which had an activity of 2.00 x 105 disintegrations per second at that time. What is the activity of that source today? (The half-life of 137Cs is 30.2 years.) Show your work Upload Choose a File

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