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  2. 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. [5]

  3. 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 ...

  4. 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).

  5. Fundamental unit (number theory) - Wikipedia

    en.wikipedia.org/wiki/Fundamental_unit_(number...

    When the unit group has rank ≥ 1, a basis of it modulo its torsion is called a fundamental system of units. [1] Some authors use the term fundamental unit to mean any element of a fundamental system of units, not restricting to the case of rank 1 (e.g. Neukirch 1999 , p. 42).

  6. Force - Wikipedia

    en.wikipedia.org/wiki/Force

    The SI unit of force is the newton (symbol N), which is the force required to accelerate a one kilogram mass at a rate of one meter per second squared, or kg·m·s −2.The corresponding CGS unit is the dyne, the force required to accelerate a one gram mass by one centimeter per second squared, or g·cm·s −2. A newton is thus equal to ...

  7. Dirichlet's unit theorem - Wikipedia

    en.wikipedia.org/wiki/Dirichlet's_unit_theorem

    Note that if K is Galois over then either r 1 = 0 or r 2 = 0.. Other ways of determining r 1 and r 2 are . use the primitive element theorem to write = (), and then r 1 is the number of conjugates of α that are real, 2r 2 the number that are complex; in other words, if f is the minimal polynomial of α over , then r 1 is the number of real roots and 2r 2 is the number of non-real complex ...

  8. Course Hero - Wikipedia

    en.wikipedia.org/wiki/Course_Hero

    Course Hero was founded by Andrew Grauer at Cornell University in 2006 for college students to share lectures, class notes, exams and assignments. [ 4 ] In November 2014, the company raised $15 million in Series A Funding, with investors that included GSV Capital and IDG Capital.

  9. Programmed learning - Wikipedia

    en.wikipedia.org/wiki/Programmed_learning

    [1] The learning material is in a kind of textbook or teaching machine or computer. The medium presents the material in a logical and tested sequence. The text is in small steps or larger chunks. After each step, learners are given a question to test their comprehension. Then immediately the correct answer is shown.