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.
Plastics and polymers Polymers What is a Polymer? A polymer is a molecule that consists of certain type of arrangement of atoms that is repeated over and over. The result is a very large molecule that can consist of 2000 or more of the base compound.olyethylene (PE) Polyethylene is a simple example of a polymer, and is one of the most common and widely used polymers. H H H H H H H H H H H H â â â â â â â â â â â â -C â- C â-C â- Câ- C â- Câ- C â- Câ- C â- Câ-C â- C - â â â â â â â â â â â â H H H H H H H H H H H H Polyethylene.