A drop of liquid of density \( \rho \) is floating half-immersed in a liquid of density \( d \)....

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A drop of liquid of density \( \rho \) is floating half-immersed in a liquid of density \( d \). If \( \rho \) is the surface tension the diameter of the drop of the liquid is
(1) \( \sqrt{\frac{\sigma}{g(2 \rho-d)}} \)
(2) \( \sqrt{\frac{2 \sigma}{g(2 \rho-d)}} \)
(3) \( \sqrt{\frac{6 \sigma}{g(2 \rho-d)}} \)
(4) \( \sqrt{\frac{12 \sigma}{g(2 \rho-d)}} \)
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