👉 An elementary fluid is a fundamental substance that exhibits the properties of both liquids and gases, such as compressibility and viscosity, but does not have a definite shape or volume. It can flow and take the shape of its container, much like a gas, but it also has a resistance to deformation, similar to a liquid. This unique behavior arises from the molecular interactions within the fluid; at a microscopic level, elementary fluids consist of individual molecules that can move freely but also experience intermolecular forces that give rise to the fluid's characteristic properties. Examples of elementary fluids include water, air, and many gases.
