👉 Specified fluids, also known as colloids, are a unique class of substances that exhibit properties between those of true solutions and suspensions. They consist of particles ranging in size from 1 nanometer to 1000 nanometers, which are larger than molecules but smaller than colloidal particles typically found in suspensions. These particles are dispersed throughout the medium without settling out, giving specified fluids their characteristic stability and unique physical properties. Examples include milk (where fat globules are dispersed in water), blood (containing red blood cells in plasma), and paint (with pigment particles suspended in a liquid medium). The size of these particles contributes to the fluid's viscosity, surface tension, and other physical behaviors that distinguish specified fluids from other types of matter.
