Electronvolt is equal to . It is a common unit of energy within physics, widely used in solid state, atomic, nuclear, and particle physics. It is commonly used with the metric prefixes milli-, kilo-, mega-, giga-, tera-, peta- or exa- (meV, keV, MeV, GeV, TeV, PeV and EeV respectively). In some older documents, and in the name Bevatron, the symbol BeV is used, which stands for billion (10) electronvolts; it is equivalent to the GeV. An electronvolt is the amount of energy gained (or lost) by the charge of a single electron moving across an electric potential difference of one volt.
Peta, Greece Peta, Greece Peta () is a town and a former municipality in the Arta regional unit, Epirus, Greece. Since the 2011 local government reform it is part of the municipality Nikolaos Skoufas, of which it is the seat and a municipal unit. The municipal unit has an area of 105.571 km. In 2011 its population was 1,563 for the town, 4,105 for the community and 4,781 for the municipal unit. Peta is located north of Amfilochia, northeast of Arta, south-southeast of Ioannina and east of Preveza. The Arachthos River and its reservoir lies to the northwest. The municipal unit Peta