This book is intended for being used as a textbook or reference book at the level of first-year graduation-level Physics or engineering. The objective is to provide a set of comprehensive materials that would help the student to grasp the concepts. The prerequisite for this book is pre-university Mathematics and Physics.
Liquid state emerges when net potential energy of a system just exceeds the kinetic energy. The intermolecular force existing in water illustrates the first kind, and the force between water molecule and glass molecule is adhesive.
For a small liquid drop, the surface tension is predominant and the effect of gravity is negligible. But in case of a large drop, the gravity becomes influential because of the weight of the liquid drop itself.