Physics, 25.03.2020 16:07 lorrainelopez
A researcher measures 200 counts per minute coming from a radioactive source at noon. At 3:00pm, she finds that this has dropped to 25 counts per minute. What percentage of the original source will remain at 6:00pm?
A) 3.125%
B) 4.5%
C) 5.8%
D) 6.25%
Answers: 1
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A researcher measures 200 counts per minute coming from a radioactive source at noon. At 3:00pm, she...
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