A) 1 : 9
B) 9 : 1
C) 3 : 1
D) 1 : 3
Correct Answer: D
Solution :
\[\frac{{{P}_{1}}}{{{P}_{2}}}=\sqrt{\frac{{{m}_{1}}}{{{m}_{2}}}}\]\[=\sqrt{\frac{1}{9}}=\frac{1}{3}\]
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