Introduction to electromagnetism is a quantity used to determine how a particle will behave in an electric field. There are three possible "types" of charge: positive, negative, and neutral. However, the distinction between positive and negative is by convention only. Electric charge is quantized in units of the elementary charge, formula_1, where a proton has a charge of formula_2 and an electron has a charge of formula_3. The SI unit of charge is the coulomb. The elementary charge formula_1 was first measured by Robert Millikan in his oil drop experiment in which the electric force on the particle is set to exactly counter
How to Dismantle an Atomic Bomb announced that if those tracks were leaked online, they would release the album immediately via the iTunes Store. Several months later, the finished album was leaked online, but the band did not release it earlier, despite previous comments. In late 2004, "Mercy", an unreleased track taken from the "How to Dismantle an Atomic Bomb" sessions, surfaced on the Internet through a fan who had been given a copy of the album containing the extra track. The track is of less than standard audio quality, but managed to become a favorite on fan websites. It was cut from the final release,