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  2. Hess's law - Wikipedia

    en.wikipedia.org/wiki/Hess's_law

    The law states that the total enthalpy change during the complete course of a chemical reaction is independent of the sequence of steps taken. [2] [3] Hess's law is now understood as an expression of the fact that the enthalpy of a chemical process is independent of the path taken from the initial to the final state (i.e. enthalpy is a state ...

  3. Thermochemical equation - Wikipedia

    en.wikipedia.org/wiki/Thermochemical_equation

    Hess's law states that the sum of the energy changes of all thermochemical equations included in an overall reaction is equal to the overall energy change. Since Δ H {\displaystyle \Delta H} is a state function and is not dependent on how reactants become products as a result, steps (in the form of several thermochemical equations) can be used ...

  4. De motu corporum in gyrum - Wikipedia

    en.wikipedia.org/wiki/De_motu_corporum_in_gyrum

    Problem 3 again explores the ellipse, but now treats the further case where the center of attraction is at one of its foci. "A body orbits in an ellipse: there is required the law of centripetal force tending to a focus of the ellipse." Here Newton finds the centripetal force to produce motion in this configuration would be inversely ...

  5. Law of attraction - Wikipedia

    en.wikipedia.org/wiki/Law_of_attraction

    Law of attraction may refer to: Electromagnetic attraction; Newton's law of universal gravitation; Law of attraction (New Thought), a New Thought belief;

  6. Newton's law of universal gravitation - Wikipedia

    en.wikipedia.org/wiki/Newton's_law_of_universal...

    In 1687 Newton published his Principia which combined his laws of motion with new mathematical analysis to explain Kepler's empirical results. [7]: 134 His explanation was in the form of a law of universal gravitation: any two bodies are attracted by a force proportional to their mass and inversely proportional to their separation squared.

  7. Intermolecular force - Wikipedia

    en.wikipedia.org/wiki/Intermolecular_force

    The attraction between cationic and anionic sites is a noncovalent, or intermolecular interaction which is usually referred to as ion pairing or salt bridge. [6] It is essentially due to electrostatic forces, although in aqueous medium the association is driven by entropy and often even endothermic.

  8. Play Chess Online for Free - AOL.com

    www.aol.com/games/play/masque-publishing/chess

    Play free chess online against the computer or challenge another player to a multiplayer board game. With rated play, chat, tutorials, and opponents of all levels!

  9. Attractor - Wikipedia

    en.wikipedia.org/wiki/Attractor

    Visual representation of a strange attractor. [1] Another visualization of the same 3D attractor is this video.Code capable of rendering this is available.. In the mathematical field of dynamical systems, an attractor is a set of states toward which a system tends to evolve, [2] for a wide variety of starting conditions of the system.