question_answer

A liquid is coming out from a vertical tube. The relation between the weight of the drop W, surface tension of the liquid T and radius of the tube r is given by, if the angle of contact is zero

A)             \[W=\pi {{r}^{2}}T\]

B)                      \[W=2\pi rT\]

C)             \[W=2{{r}^{2}}\pi T\]        

D)             \[W=\frac{3}{4}\pi {{r}^{3}}T\]