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.
Rube Goldberg Challenge. Age Range. o 10-15. Materials. The activity kit contains 10 large Ziploc bags that consist of kits that are to be handed out. to teams of approximately 4 students. Each kit should contain all of the following. materials.