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A n alpha-particle of velocity 1.6xx10^(...

A n `alpha`-particle of velocity `1.6xx10^(7) m s^(-1)` approaches a gold nucleii `(Z=79)`. Calculate the distance of closest approach. Mas of an `alpha`-particle `=6.6xx10^(-27) kg`.

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The correct Answer is:
`4.3xx10^(-14) m`
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