8.1 Internal Structure and Density

Describe the properties of a fluid.

• Distinguishing properties of solids, liquids, and gases stem from the varying interactions between atoms and molecules.
• A fluid is a substance that has no fixed shape.
• Fluids can be characterized by their density. Density is defined as a ratio of mass to volume. Relevant equation:
• An ideal fluid is incompressible and has no viscosity. TOPIC 8.1 Internal Structure and Density