._(29)^(64) Cu can decay by beta^(-) or beta^(+) emmision, or electron capture. It is known that ._(29)^(64) Cu has a half life of 12.8 hrs with 40% probability of beta^(-) decay 20% probability of beta^(+) decay and 40% probability of electron capture. The mass of ._(29)^(64) Cu is 63.92977amu whil e ._(30)^(64) Zn is 63.92914 amu and ._(28)^(64) Ni is 63.92796 amu. If initially there was 10^(22) atoms of._(29)^(64) Cu, what is the initial rate at which energy is being produced due to beta^(+) decay ?

._(29)^(64) Cu can decay by beta^(-) or beta^(+) emmision, or electron

1.	._(29)^(64) Cu can decay by beta^(-) or beta^(+) emmision, or electron capture. It is known that ._(29)^(64) Cu has a half life of 12.8 hrs with 40% probability of beta^(-) decay 20% probability of beta^(+) decay and 40% probability of electron capture. The mass of ._(29)^(64) Cu is 63.92977amu whil e ._(30)^(64) Zn is 63.92914 amu and ._(28)^(64) Ni is 63.92796 amu. If initially there was 10^(22) atoms of._(29)^(64) Cu, what is the initial rate at which energy is being produced due to beta^(+) decay ?
Answer» `5.8xx10^(4)` W `3.2xx10^(3)` W `8.4xx10^(2)` W `1.6xx10^(4)` W Solution :`(dQ)/(dt)=(dN)/(dt)XXQ=(0.666xx10^(6)xx1.6xx10^(-19)xx0.2xxl n 2xx10^(22))/(12.8xx3600)` `=3.2xx10^(3)` W

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