question_answer

One spherical ball of radius R, density d                 released in liquid of density\[\frac{d}{2}\]attains a terminal velocity \[\upsilon \]. Another ball of radius 2R   and density 1.5d released in the same liquid, which attain the terminal velocity?

A)  8\[\upsilon \]                                   

B)  2\[\upsilon \]

C)  1.5\[\upsilon \]               

D)  6\[\upsilon \]