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Nucleus X has A = 125 and nucleus Y has A = 8. What is the ratio of radius X to radius Y?
A125 : 8
B5 : 2
C25 : 4
D5 : 4
Answer & Solution
Correct answer: B. 5 : 2
Radii scale as the cube root of A, so the ratio is the cube root of 125/8, which is 5/2.
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