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Physics
Physics
Problem
A
200
g
200\,\text{g}
200
g
sample of a radioactive isotope reduces to
12.5
g
12.5\,\text{g}
12.5
g
in
30
h
30\,\text{h}
30
h
. Determine its decay constant in
h
−
1
\text{h}^{-1}
h
−
1
, correct to three significant figures.
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