👉 A fluid, in the context of physics and chemistry, is a substance that takes the shape of its container but not its volume. This characteristic distinguishes fluids from solids and gases. Liquids, the most common type of fluid, have a definite volume but not a definite shape; they flow and can be poured into various containers while maintaining their molecular structure. Gases, another type of fluid, have neither a definite volume nor shape; they expand to fill any container they occupy and take on the shape of their surroundings. Examples of fluids include water, oil, air, and mercury. The behavior of fluids is governed by principles such as Pascal's Law and Bernoulli's Principle, which describe how pressure applied to a fluid is transmitted equally in all directions and how fluid dynamics influence flow rates and pressure differences.
