👉 A fluid, often referred to as a liquid, is a substance that takes the shape of its container while maintaining a constant volume. Unlike gases, which expand to fill any space, fluids maintain a consistent density and resist compression. This property means that fluids can flow from areas of higher pressure to areas of lower pressure, a phenomenon described by Pascal's principle. Common examples of fluids include water, oil, and blood, all of which exhibit these characteristics. The behavior of fluids is governed by principles such as viscosity and surface tension, making them essential in various scientific and engineering applications.
