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  2. Sharp series - Wikipedia

    en.wikipedia.org/wiki/Sharp_series

    The sharp series limit is the same as the diffuse series limit. In the late 1800s these two were termed supplementary series. In 1896 Arthur Schuster stated his law: "If we subtract the frequency of the fundamental vibration from the convergence frequency of the principal series, we obtain the convergence frequency of the supplementary series". [5]

  3. Quizlet - Wikipedia

    en.wikipedia.org/wiki/Quizlet

    Quizlet is a multi-national American company that provides tools for studying and learning. [1] Quizlet was founded in October 2005 by Andrew Sutherland, who at the time was a 15-year old student, [ 2 ] and released to the public in January 2007. [ 3 ]

  4. SAT Subject Test in Chemistry - Wikipedia

    en.wikipedia.org/wiki/SAT_Subject_Test_in_Chemistry

    The test had 85 multiple choice questions, each consisting of five answer choices, that were to be answered in one hour. Students received 1 point for every correct answer, lost ¼ of a point for each incorrect answer, and received 0 points for questions left blank. This score was then converted to a scaled score of 200-800.

  5. Spectroscopy - Wikipedia

    en.wikipedia.org/wiki/Spectroscopy

    Spectroscopy, primarily in the electromagnetic spectrum, is a fundamental exploratory tool in the fields of astronomy, chemistry, materials science, and physics, allowing the composition, physical structure and electronic structure of matter to be investigated at the atomic, molecular and macro scale, and over astronomical distances.

  6. Perez v. Sharp - Wikipedia

    en.wikipedia.org/wiki/Perez_v._Sharp

    Perez v. Sharp, [1] also known as Perez v. Lippold or Perez v.Moroney, is a 1948 case decided by the Supreme Court of California in which the court held by a 4–3 majority that the state's ban on interracial marriage violated the Fourteenth Amendment to the United States Constitution.

  7. Wikipedia - Wikipedia

    en.wikipedia.org/wiki/Wikipedia

    Several languages of Wikipedia also maintain a reference desk, where volunteers answer questions from the general public. According to a study by Pnina Shachaf in the Journal of Documentation, the quality of the Wikipedia reference desk is comparable to a standard library reference desk, with an accuracy of 55 percent. [250]

  8. Hypodermic needle - Wikipedia

    en.wikipedia.org/wiki/Hypodermic_needle

    It is one of a category of medical tools which enter the skin, called sharps. [1] It is commonly used with a syringe , a hand-operated device with a plunger, to inject substances into the body (e.g., saline solution , solutions containing various drugs or liquid medicines) or extract fluids from the body (e.g., blood).

  9. Linux - Wikipedia

    en.wikipedia.org/wiki/Linux

    The most common free software license, the GNU General Public License (GPL), is a form of copyleft and is used for the Linux kernel and many of the components from the GNU Project. [ 109 ] Linux-based distributions are intended by developers for interoperability with other operating systems and established computing standards.