Battery Reference Libraries

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2010-11-15 17:25:25

A flyswatter, usually consisting of a small rectangular sheet of flexible material, is a handheld device for smashing flies and other insects. The material is vented, thus reducing wind drag making it move faster in order to hit the target. The beginning flyswatters were just a striking surface attached to the end of a long stick. Dr. Samuel Crumbine was trying to raise awareness of the fly...

2010-11-15 16:34:28

Lee De Forest invented the Audion, a forerunner of the triode, which is an amplifying vacuum tube. The grid controls the filament which sends the current from the filament. The Audion can detect radio signals by applying a small amount of power to the grid that can control a larger current from the filament plate. However, De Forest's Audion is distinct from the true vacuum triode since it is...

Volta Alessandro Antonio Anastasio
2009-04-28 16:42:15

Count Alessandro Antonio Anastasio Volta was born on February 18, 1745 in Como, Duchy of Milan. At age 39, Volta became a professor at the Royal School in Como in the physics department. A year later, in 1775, Volta invented a device called the electrophorus which generates static electric charges. He marketed his creation so well, that he is often given credit as its inventor. However, a...

2005-05-26 09:33:48

Lithium is the chemical element with symbol Li and atomic number 3. In the periodic table, it is located in group 1, among the alkali metals. Lithium in its pure form is a soft, silver white metal, that tarnishes and oxidizes very rapidly in air and water. It is the lightest solid element and is primarily used in heat transfer alloys, in batteries and serves as a component in some drugs known...

Word of the Day
  • A hairdresser.
The word 'friseur' comes from French friseur, from friser ("to curl, frizz").