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.
Try and make YOUR OWN UNIQUE Rube Goldberg that has each of. the six simple machines listed below and can transfer energy in at. least five different ways: PULLEY: A simple machine that uses grooved wheels and a rope to. raise, lower or move a load.