Introduction to Physics

A clean capillary tube of uniform bore is fixed vertically with its lower end dipping into water taken in a beaker. A needle N is…

Illustrations of capillarity: (i) A blotting paper absorbs ink by capillary action. The pores in the blotting paper act as capillaries. (ii) The oil in…

The property of surface tension gives rise to an interesting phenomenon called capillarity. When a capillary tube is dipped in water, the water rises up…

A soap bubble has two liquid surfaces in contact with air, one inside the bubble and the other outside the bubble. In balance, the air…

Consider a liquid drop of radius r, and surface tension T. The molecules on the surface of the drop experience a resultant force acting inwards…

When the free surface of a liquid comes in contact with a solid, it becomes curved at the point of contact. The angle between the…

The potential energy per unit area of the surface film is called surface energy. Consider a metal frame ABCD in which AB is movable. The…

Surface tension is the property of the free surface of a liquid at rest to behave like a stretched membrane in order to acquire minimum…

Molecular range is the maximum distance up to which a molecule can exert the force of attraction on another molecule. It is of the order…

The force between two molecules of a substance is called intermolecular force. This intermolecular force is basically electric in nature. When the distance between two…