👉 In physics, a fluid is a substance that takes the shape of its container while still maintaining a constant volume, unlike solids which have a fixed shape and volume. Fluids can flow and move under the influence of external forces, such as gravity or pressure differences, due to their molecular structure allowing them to slide past one another. This property distinguishes fluids from gases, which are compressible and do not maintain a fixed shape. Examples of fluids include liquids like water and oils, and gases like air, each exhibiting unique behaviors based on their density and molecular interactions.
