If nucleus and atom are considered as perfect spheres with diameters \( 4 \times 10^{-15} \mathr...

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If nucleus and atom are considered as perfect spheres with diameters \( 4 \times 10^{-15} \mathrm{~m} \) and \( 2 \times 10^{-10} \) \( \mathrm{m} \), respectively, then the ratio of the volumes of nucleus and atom should be
(a) \( 2 \times 10^{-5}: 1 \)
(b) \( 8 \times 10^{-15}: 1 \)
(c) \( 1.25 \times 10^{14}: 1 \)
(d) \( 8 \times 10^{15}: 1 \)
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