👉 A fluid, in the context of physics and chemistry, is a substance that takes the shape of its container without changing its chemical composition. Initially, this means it can flow and change its volume while maintaining its identity as a single substance. Think of water or oil—when poured, they flow and adapt to the shape of any container they're placed in, yet they remain fundamentally the same material. This property is crucial for understanding various natural phenomena and industrial applications, from cooking to manufacturing processes.
