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.
History of the Rube Goldberg machine contest. Rube Goldberg Machine Contests bring Goldberg's cartoons to life in a way that pulls students away from traditional ways of looking at problems and sends them spinning into the intuitive, chaotic realm of imagination.istory of the Rube Goldberg machine contest. Rube Goldberg Machine Contests bring Goldberg's cartoons to life in a way that pulls students away from traditional ways of looking at problems and sends them spinning into the intuitive, chaotic realm of imagination.