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`._(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 ?A. `5.8xx10^(4)` WB. `3.2xx10^(3)` WC. `8.4xx10^(2)` WD. `1.6xx10^(4)` W |
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Answer» Correct Answer - B `(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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