mission impossible now complete
on my last attempt i got it right
ln (R_1/R_2)= lambda*deltat
ln (8305/3070)= lambda*5days
0.995180181= lambda*5days
0.995180181*1/5 = 0.19903636 = lambda
lambda*T= ln 2= 0.6931
0.6931/0.19903636= T
T_1/2= 3.482283978
= 3.48 days
:)
lol ok i worked it out now
i didn't need to do the c^2 part because it canceled out
so i just needed to go
0.001038 x 931.5
which gave me the right answer of
0.967MeV
hi
i'm new so i hope i am writing this in the correct part of the forums
this is the question i have been given:
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What is the energy Q released when ^{131}_{\ 53}{\rm I}decays and ^{131}_{\ 54}{\rm Xe} is formed? The atomic mass of ^{131}_{\ 53}{\rm I} is 130.906118 \rm u and the...