A 60Co source (which has a half-life of 5.2714
y) is labeled 4.00 mCi, but its present activity is found to
be 1.2 × 107 Bq.
R = 1.2 × 107 Bq
a. What is the present activity in mCi?
R=
b. How long ago did it actually have a 4.00 mCi activity in
years?
t=
A 60Co source (which has a half-life of 5.2714 y) is labeled 4.00 mCi, but its present activity is found to be 1.2 × 107
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A 60Co source (which has a half-life of 5.2714 y) is labeled 4.00 mCi, but its present activity is found to be 1.2 × 107
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