Fluid PartideandIts Mainly Physical Charadters 81-2 Fluid Particle and Continuous Medium Hypothesis 1. The physical properties of fluid liquid fluid g ras Fluid and solid are different forms of material. They all have the following basic attributes of material 1. Composed of a great deal of molecules 2. Molecules do random movements continuously 3. The molecule force exists between molecules 77 Fluid and solid are different forms of material. They all have the following basic attributes of material : §1-2 Fluid Particle and Continuous Medium Hypothesis 1. The physical properties of fluid 1.Composed of a great deal of molecules. 2.Molecules do random movements continuously . 3.The molecule force exists between molecules. fluid liquid gas   