Question
Physics Question on Radioactivity
A radioactive isotope phosphorous-32 has an initial activity 10μCi and has half life of 14 days. What is the activity of the source after 42 days?
A
1.25μCi
B
2.5μCi
C
5μCi
D
0.625μCi
Answer
1.25μCi
Explanation
Solution
The correct option is (A): 1.25μCi