👉 A classic fluid, often referring to water or oil, is a substance that flows easily under the influence of gravity and pressure, exhibiting properties of both liquids and gases. Unlike solids, which maintain a fixed shape, fluids adapt to their container's form, and unlike gases, they conform to the volume of any space they occupy. This unique behavior stems from the intermolecular forces between fluid molecules, which are weaker than those in solids but stronger than those in gases, allowing them to move past one another. As a result, fluids can be easily poured, splashed, or spread, and they can also exhibit surface tension, enabling them to form droplets and climb surfaces. This dual nature of fluids is fundamental in understanding many natural phenomena, from the movement of ocean waves to the circulation of blood in our bodies.
