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.
Something for nothing (1940). A Rube Goldberg machine is a contraption, invention, device or apparatus that is deliberately over-engineered to perform a simple task in a complicated fashion, usually including a chain reaction. The expression is named after American cartoonist and inventor Rube Goldberg (1883â1970).or example, news headlines include Is Rep. Bill Thomas the Rube Goldberg of Legislative Reform? and Retirement 'insurance' as a Rube Goldberg machine.