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.
Noun. 1. polymer-a naturally occurring or synthetic compound consisting of large molecules made up of a linked series of repeated simple monomers. chemical compound, compound - (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight.olÂ·yÂ·mer. Any of various chemical compounds made of smaller, identical molecules (called monomers) linked together. Some polymers, like cellulose, occur naturally, while others, like nylon, are artificial.