explain various physical properties of water on which ascend of xylem sac depends

3 physical properties of water affecting the ascent of xylem sap in xylem are:

• Cohesion − Mutual attraction between water molecules

• Adhesion − Attraction of water molecules to polar surface (xylem cell wall surfaces)

• Surface tension − Attraction of water to each other in liquid phase to a greater extent than to water in gaseous phase