A liquid is contained in a vertical tube of semicircular cross section. The contact angle is zero. Find the ratio of force of surface tension on the curved part and on the flat part.

A liquid is contained in a vertical tube of semicircular cross section

1.	A liquid is contained in a vertical tube of semicircular cross section. The contact angle is zero. Find the ratio of force of surface tension on the curved part and on the flat part.
Answer» SOLUTION :Force on curved part `(F_(1))=Sxxpir` Force on FLAT part `(F_(2))=Sxx2r` `:.(F_(1))/(F_(2))=pi:2`