The noise that the plane makes is sometimes so loud that you cannot hear any other noise. Sound is a type of energy. Sounds are produced when an object vibrates. When this happens, the air around the object also vibrates. These vibrations in the air travel as sound waves. A jet engine makes a great deal of sound energy. The engine sounds loud when it is close, but you can sometimes hear the noise when the plane is even several miles away from you.
Definition of Polymer. A large molecule consisting of chains or rings of linked monomer units, usually characterized by high melting and boiling points.
Polymers refer to. compounds of high molecular weight derived form the addition of many smaller molecules or by. the condensation of many small molecules along with the elimination of water, alcohol, or the. like. The word polymer comes from Greek where poly means many and the word meros means. unit, hence many units. Coatings are based on polymers such as epoxies, polyesters, vinyl esters, polyurethanes, polyureas, and others.