Liquids can interact with flat surfaces just as they can with capillary tubes; the cohesive forces within the liquid can be stronger or weaker than the adhesive forces between liquid and surface:

(a) In which of these diagrams, i or ii, do the adhesive forces between surface and liquid exceed the cohesive forces within the liquid? 

(b) Which of these diagrams, i or ii, represents what happens when water is on a nonpolar surface?

(c) Which of these diagrams, i or ii, represents what happens when water is on a polar surface?

Transcribed Image Text:

(i) (ii)