Can anyone explain
point 44 of the attached pdf document on surface tension.
(Here's the link in case attachment doesn't work:
http://www.sakshieducation.com/EAMCE...0_198-208_.pdf
How is the surface tension direction found out?
{i know it tangential but in which direction along the tangent?}
Also
why is surface tension for Solid-Air Surface considered when balancing forces on liquid?
Any help will be appreciated
Thank you.