Chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) are fully or partly halogenated paraffin hydrocarbons that contain only carbon (C), hydrogen (H), chlorine (Cl), and fluorine (F), produced as volatile derivatives of methane, ethane, and propane. They are also commonly known by the DuPont brand name Freon.
invented by Charles Babbage
Charles Babbage, considered the “father of the computer”, begins…
invented by Joseph Henry
A relay is an electrically operated switch. It consists of a set of input…
invented by richard trevithick
A steam locomotive is a rail vehicle that provides the force to move itself and…
invented by Paul Vieille
Poudre B was the first practical smokeless gunpowder created in 1884. It was…
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