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.
A polymer is a long-chained molecule that is composed of individual units, called monomers. See related questions below. Let's break down the word: Poly-means many-Mer â¦ means part. So, the word means many parts. Polymers are large molecules that are made of a chain of smaller, repeating molecules. Polymers are found in several objects that we use in day to day life. Examples include fishing line, umbrellas, clothing, and kitchen utensils.