Chemical refrigerants are assigned an R number which is determined systematically according to molecular structure.Common refrigerants are frequently referred to as Freon (a registered trademark of DuPont).hemical refrigerants are assigned an R number which is determined systematically according to molecular structure.
Some Rube Goldberg machines. use a complicated series of actions to simply move an object from. one place to another. Any object that is moving, has what is called kinetic energy; giving. an object more speed means giving it more kinetic energy.
Reuben Garrett Lucius Rube Goldberg (July 4, 1883 â December 7, 1970) was an American cartoonist, sculptor, author, engineer, and inventor.e is the inspiration for various international competitions, known as Rube Goldberg Machine Contests, which challenge participants to make a complicated machine to perform a simple task.