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Find the half-life of U^(288), if one gr...

Find the half-life of `U^(288)`, if one gram of it emits `1.23 times 10^(4) alpha-` particles `s^(-1)`.
[1 year `=3.155 times 10^(9)s`].

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The correct Answer is:
`4.516 times 10^(9)yr`
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