Another way that prototypes are classified is by the fidelity of the prototype, or the degree to which the prototype represents the appearance and interaction of the system.[ 4 ] A low-fidelity prototype is one that is quickly constructed to depict concepts, design alternatives, and screen layouts.
A solution is a homogeneous mixture of one or more solutes dissolved in a solvent. 1  solvent: the substance in which a solute dissolves to produce a homogeneous mixture. 2  solute: the substance that dissolves in a solvent to produce a homogeneous mixture.
A solution is a homogeneous mixture of two or more substances. One of these substances is called the solvent; it is usually the component that is present in greater quantity. The other substances in the solution are known as solutes; they are said to be dissolved in the solvent. For example, when a small amount of sodium chloride, NaCl, is dissolved in a large quantity of water, we refer to water as the solvent and sodium chloride as the solute.