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  2. Coulomb's law - Wikipedia

    en.wikipedia.org/wiki/Coulomb's_law

    Coulomb's inverse-square law, or simply Coulomb's law, is an experimental law [1] of physics that calculates the amount of force between two electrically charged particles at rest. This electric force is conventionally called the electrostatic force or Coulomb force . [ 2 ]

  3. Relativistic electromagnetism - Wikipedia

    en.wikipedia.org/wiki/Relativistic_electromagnetism

    Rosser's book Classical Electromagnetism via Relativity was popular, [9] as was Anthony French's treatment in his textbook [10] which illustrated diagrammatically the proper charge density. One author proclaimed, "Maxwell — Out of Newton, Coulomb, and Einstein".

  4. Classical electromagnetism and special relativity - Wikipedia

    en.wikipedia.org/wiki/Classical_electromagnetism...

    The theory of special relativity plays an important role in the modern theory of classical electromagnetism.It gives formulas for how electromagnetic objects, in particular the electric and magnetic fields, are altered under a Lorentz transformation from one inertial frame of reference to another.

  5. Electric potential energy - Wikipedia

    en.wikipedia.org/wiki/Electric_potential_energy

    When talking about electrostatic potential energy, time-invariant electric fields are always assumed so, in this case, the electric field is conservative and Coulomb's law can be used. Using Coulomb's law, it is known that the electrostatic force F and the electric field E created by a discrete point charge Q are radially directed from Q.

  6. Action at a distance - Wikipedia

    en.wikipedia.org/wiki/Action_at_a_distance

    Coulomb's law and Newton's law of universal gravitation are based on action at a distance. Historically, action at a distance was the earliest scientific model for gravity and electricity and it continues to be useful in many practical cases. In the 19th and 20th centuries, field models arose to explain these phenomena with more precision.

  7. Charles-Augustin de Coulomb - Wikipedia

    en.wikipedia.org/wiki/Charles-Augustin_de_Coulomb

    Shear resistance law: Coulomb formulated the shear resistance of soils as = + ⁡, where represents cohesion, is normal stress, and is the angle of internal friction. Active and passive earth pressure : He introduced the concepts of active and passive earth pressure limits, which describe the conditions under which soil exerts pressure on a ...

  8. List of electromagnetism equations - Wikipedia

    en.wikipedia.org/wiki/List_of_electromagnetism...

    Continuous charge distribution. The volume charge density ρ is the amount of charge per unit volume (cube), surface charge density σ is amount per unit surface area (circle) with outward unit normal n̂, d is the dipole moment between two point charges, the volume density of these is the polarization density P.

  9. A Question and Answer Guide to Astronomy - Wikipedia

    en.wikipedia.org/wiki/A_Question_and_Answer...

    A Question and Answer Guide to Astronomy is a book about astronomy and cosmology, and is intended for a general audience. The book was written by Pierre-Yves Bely, Carol Christian, and Jean-Rene Roy, and published in English by Cambridge University Press in 2010. It was originally written in French. [1]