If \( r_{1} \) and \( r_{2} \) are the radii of the atomic nuclei of mass numbers 64 and 125 res....
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If \( r_{1} \) and \( r_{2} \) are the radii of the atomic nuclei of mass
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numbers 64 and 125 respectively, then the ratio
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\( \left(r_{1} / r_{2}\right) \)
(1) \( \frac{4}{125} \)
(2) \( \sqrt{\frac{64}{125}} \)
(3) \( \frac{5}{4} \)
(4) \( \frac{4}{5} \)
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