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34. Using Eq. 4314 and Eq. 4317 (and the fact that mass is proportional to the number of atoms), the
amount decayed is

∆
m

=
m

t
f
=16
.
0h
−
m

t
i
=14
.
=
m
0
(1
−
e
−
t
i
ln 2
/T
1
/
2
)
−
m
0
(1
−
e
−
t
f
ln 2
/T
1
/
2
)
=
m
0
(
e
−
t
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 Fall '08
 SPRUNGER
 Physics, Mass

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