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  2. Rothschild family - Wikipedia

    en.wikipedia.org/wiki/Rothschild_family

    The Rothschild family (/ ˈ r ɒ θ (s) tʃ aɪ l d / ROTH(S)-chylde German: [ˈʁoːt.ʃɪlt]) is a wealthy Ashkenazi Jewish noble banking family originally from Frankfurt.The family's documented history starts in 16th century Frankfurt; its name is derived from the family house, Rothschild, built by Isaak Elchanan Bacharach in Frankfurt in 1567.

  3. Systems theory - Wikipedia

    en.wikipedia.org/wiki/Systems_theory

    Systems theory is the transdisciplinary [1] study of systems, i.e. cohesive groups of interrelated, interdependent components that can be natural or artificial.Every system has causal boundaries, is influenced by its context, defined by its structure, function and role, and expressed through its relations with other systems.

  4. Academic grading in the United States - Wikipedia

    en.wikipedia.org/wiki/Academic_grading_in_the...

    For example, daily homework may be counted as 50% of the final grade, chapter quizzes may count for 20%, the comprehensive final exam may count for 20%, [1] and a major project may count for the remaining 10%. Each are created to evaluate the students' understanding of the material and of their complex understanding of the course material.

  5. Electric charge - Wikipedia

    en.wikipedia.org/wiki/Electric_charge

    He came to the conclusion that electric charge was a relation between two or more bodies, because he could not charge one body without having an opposite charge in another body. [45] In 1838, Faraday also put forth a theoretical explanation of electric force, while expressing neutrality about whether it originates from one, two, or no fluids. [46]

  6. Electric field - Wikipedia

    en.wikipedia.org/wiki/Electric_field

    The electric field of such a uniformly moving point charge is hence given by: [25] = (⁡) /, where is the charge of the point source, is the position vector from the point source to the point in space, is the ratio of observed speed of the charge particle to the speed of light and is the angle between and the observed velocity of the charged ...

  7. Electric dipole moment - Wikipedia

    en.wikipedia.org/wiki/Electric_dipole_moment

    Two point charges, one with charge +q and the other one with charge −q separated by a distance d, constitute an electric dipole (a simple case of an electric multipole). For this case, the electric dipole moment has a magnitude p = q d {\displaystyle p=qd} and is directed from the negative charge to the positive one.

  8. Charge density - Wikipedia

    en.wikipedia.org/wiki/Charge_density

    Volume charge density (symbolized by the Greek letter ρ) is the quantity of charge per unit volume, measured in the SI system in coulombs per cubic meter (C⋅m −3), at any point in a volume. [1] [2] [3] Surface charge density (σ) is the quantity of charge per unit area, measured in coulombs per square meter (C⋅m −2), at any point on a ...

  9. List of countries by system of government - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by...

    Bosnia and Herzegovina (two entities and one district that is a condominium of the two entities) Brazil (26 states and the Federal District) Canada (ten provinces and three territories) Comoros ( Anjouan, Grande Comore, and Mohéli) Ethiopia (10 regions and 2 chartered cities) Germany India (28 states and 8 union territories)

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