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Carbon-II decays to boron-II according t...

Carbon-II decays to boron-II according to the following formula.
`._(6)^(11)Crarr ._(5)^(11)B+e^(+)+v_(e )+0.96 MeV`
Assume that positrons `(e^(+))` produced in the decay combine with free electrons in the atmosphere and annihilate each other almost immediately. Also assume that the neutrinos `(v_(e ))` are massless and do not interact with the environment. At t = 0 we have `1 mu g` of `._(6)^(12)C` . If the half-life of the decay process is `t_(0)`, the net energy produced between time t = 0 and `t=2t_(0)` will be nearly -

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