👉 The term "fluid" in this context refers to substances that are neither solid nor gas but instead exist in a liquid state, characterized by their ability to flow and take the shape of their container while maintaining a constant volume. Liquids have a definite volume but not a definite shape, allowing them to fill any space they are placed in. This unique property arises from the intermolecular forces between liquid molecules, which are weaker than those in solids but stronger than those in gases, enabling the molecules to move freely and slide past each other. Examples of fluids include water, oil, and mercury.
