How many disintegrations per second will occur in one gram of `._92U^(238)`, if its half life against alpha decay is `1.42xx10^(17)s` ?
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Here, `(dN)/(dt)=?` N=numbers of atoms in one gram `=(6.023xx10^(23))/238` `T=1.42xx10^(17)s` `(dN)/(dt)=lambdaN=0.693/TxxN` `=(0.693xx6.023xx10^(23))/(1.42xx10^(17)xx238)` `=1.23xx10^4s^-1`
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