law of attraction and repulsion between electrostatic charges
Coulomb's law
title: Charles-Augustin de Coulomb text: Charles-Augustin de Coulomb Charles-Augustin de Coulomb (; ; 14 June 1736 – 23 August 1806) was a French military engineer and physicist. He is best known for developing what is now known as Coulomb's law, the description of the electrostatic force of attraction and repulsion, but also did important work on friction. The SI unit of electric charge, the coulomb, was named in his honour in 1908. Charles-Augustin de Coulomb was born in Angoulême, Angoumois county, France, to Henry Coulomb, an inspector of the royal demesne originally from Montpellier, and Catherine Bajet. He was baptised at the parish church of title: Charles-Augustin de Coulomb text: He thought that the attraction and repulsion were due to different kinds of fluids. Charles-Augustin de Coulomb Charles-Augustin de Coulomb (; ; 14 June 1736 – 23 August 1806) was a French military engineer and physicist. He is best known for developing what is now known as Coulomb's law, the description of the electrostatic force of attraction and repulsion, but also did important work on friction. The SI unit of electric charge, the coulomb, was named in his honour in 1908. Charles-Augustin de Coulomb was born in Angoulême, Angoumois county, France, to Henry Coulomb, an inspector of the royal demesne title: Electrochemistry text: each other whilst unlike charges attract. Du Fay announced that electricity consisted of two fluids: ""vitreous"" (from the Latin for ""glass""), or positive, electricity; and ""resinous,"" or negative, electricity. This was the "two-fluid theory" of electricity, which was to be opposed by Benjamin Franklin's "one-fluid theory" later in the century. In 1785, Charles-Augustin de Coulomb developed the law of electrostatic attraction as an outgrowth of his attempt to investigate the law of electrical repulsions as stated by Joseph Priestley in England. In the late 18th century the Italian physician and anatomist Luigi Galvani marked the birth of electrochemistry by establishing title: Coulomb's law text: Coulomb's law Coulomb's law, or Coulomb's inverse-square law, is a law of physics for quantifying the amount of force with which stationary electrically charged particles repel or attract each other. In its scalar form, the law is: where "k" is Coulomb's constant ("k" ≈ ), "q" and "q" are the signed magnitudes of the charges, and the scalar "r" is the distance between the charges. The force of the interaction between the charges is attractive if the charges have opposite signs (i.e., "F" is negative) and repulsive if like-signed (i.e., "F" is positive). The law was first published in 1785 title: Electrostatics text: of the surfaces has a high resistance to electrical flow. This is because the charges that transfer are trapped there for a time long enough for their effects to be observed. These charges then remain on the object until they either bleed off to ground or are quickly neutralized by a discharge: e.g., the familiar phenomenon of a static 'shock' is caused by the neutralization of charge built up in the body from contact with insulated surfaces. Coulomb's law states that: 'The magnitude of the electrostatic force of attraction or repulsion between two point charges is directly proportional to the