👉 A "relative fluid" refers to a substance that exhibits properties of being both liquid and gaseous, but not fully liquid or fully gaseous under normal conditions. It has characteristics of both states, such as the ability to flow like a liquid but also expand and take the shape of its container like a gas. This unique behavior is due to the molecular structure, where molecules are loosely bound together but not as tightly as in a solid or as freely dispersed as in a gas. Examples of substances that can act as relative fluids include water vapor, hydrogen chloride, and ammonia.
