👉 A fluid, in the context of physics and engineering, is a substance that can flow or change shape without breaking apart into distinct parts. This property is characteristic of liquids, which have a definite volume but take the shape of their container. Unlike gases, fluids maintain a constant density and can flow smoothly, allowing them to fill any space they are placed in. Examples of fluids include water, oil, and air. The fluidity of these substances enables them to move and adapt to their environment, making them essential for various natural processes and human applications, such as in hydraulic systems and biological functions.
