👉 In physics, a capillary tube is a type of fluid or solid that behaves like a liquid at room temperature. It's characterized by its ability to expand and contract under pressure, similar to how water in a cup expands when you pour it into a container. Capillarity is the process by which liquids or gases flow through tiny openings between two layers of solid particles. This phenomenon can be observed on a surface or inside a liquid, such as a capillary tube. The movement of liquid or
