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 - Biography and Background. It can be said that Rube Goldberg was quite the jack-of-all-trades during his lifetime. After all, he was a cartoonist, an engineer, an inventor, a sculptor, and a writer. As a writer, he was credited for having written essays, plays, and even poetry.