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  2. Fundamental interaction - Wikipedia

    en.wikipedia.org/wiki/Fundamental_interaction

    The strong interaction, or strong nuclear force, is the most complicated interaction, mainly because of the way it varies with distance. The nuclear force is powerfully attractive between nucleons at distances of about 1 femtometre (fm, or 10 −15 metres), but it rapidly decreases to insignificance at distances beyond about 2.5 fm. At ...

  3. Theory of everything - Wikipedia

    en.wikipedia.org/wiki/Theory_of_everything

    String theory posits that at the beginning of the universe (up to 10 −43 seconds after the Big Bang), the four fundamental forces were once a single fundamental force. According to string theory, every particle in the universe, at its most ultramicroscopic level ( Planck length ), consists of varying combinations of vibrating strings (or ...

  4. Standard Model - Wikipedia

    en.wikipedia.org/wiki/Standard_Model

    The Standard Model of particle physics is the theory describing three of the four known fundamental forces (electromagnetic, weak and strong interactions – excluding gravity) in the universe and classifying all known elementary particles.

  5. Elementary particle - Wikipedia

    en.wikipedia.org/wiki/Elementary_particle

    String theory predicts 1- to 10-branes (a 1-brane being a string and a 10-brane being a 10-dimensional object) that prevent tears in the "fabric" of space using the uncertainty principle (e.g., the electron orbiting a hydrogen atom has the probability, albeit small, that it could be anywhere else in the universe at any given moment).

  6. Quizlet - Wikipedia

    en.wikipedia.org/wiki/Quizlet

    Quizlet's primary products include digital flash cards, matching games, practice electronic assessments, and live quizzes. In 2017, 1 in 2 high school students used Quizlet. [ 4 ] As of December 2021, Quizlet has over 500 million user-generated flashcard sets and more than 60 million active users.

  7. Unified field theory - Wikipedia

    en.wikipedia.org/wiki/Unified_field_theory

    In physics, a unified field theory (UFT) is a type of field theory that allows all fundamental forces and elementary particles to be written in terms of a single type of field. According to modern discoveries in physics, forces are not transmitted directly between interacting objects but instead are described and interpreted by intermediary ...

  8. List of particles - Wikipedia

    en.wikipedia.org/wiki/List_of_particles

    Quarks are the fundamental constituents of hadrons and interact via the strong force. Quarks are the only known carriers of fractional charge , but because they combine in groups of three quarks (baryons) or in pairs of one quark and one antiquark (mesons), only integer charge is observed in nature.

  9. Free body diagram - Wikipedia

    en.wikipedia.org/wiki/Free_body_diagram

    In physics and engineering, a free body diagram (FBD; also called a force diagram) [1] is a graphical illustration used to visualize the applied forces, moments, and resulting reactions on a free body in a given condition. It depicts a body or connected bodies with all the applied forces and moments, and reactions, which act on the body(ies).

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