👉 The term "fluid" in the context of a fluid is a substance that takes the shape of its container and flows easily, unlike solids which have a fixed shape and structure. Examples include water, air, and oils. This characteristic of fluidity allows them to move and adapt to changes in their environment, such as filling a cup or spreading across a surface. Fluids can also exhibit properties like viscosity, which describes their resistance to flow, and surface tension, which is the cohesive force between fluid molecules. These properties make fluids essential in various natural processes and human applications, from the movement of water in rivers to the functioning of engines in machines.
