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. Rube Goldberg (formally Reuben Garrett Lucius Goldberg) was an American cartoonist, engineer and inventor of the 20th century known for his political cartoons and manufacturing complicated devices to perform simple tasks. Goldberg was born in 1883 in San Francisco, California to Jewish parents, the third of seven children.