chemistry (word) wikipedia - EAS

23-32 trong số 4,000 kết quả
  1. Forensic science - Wikipedia

    https://en.wikipedia.org/wiki/Forensic_science

    WebForensic science, also known as criminalistics, is the application of science to criminal and civil laws, mainly—on the criminal side—during criminal investigation, as governed by the legal standards of admissible evidence and criminal procedure.Forensic science is a broad field that includes; DNA analysis, fingerprint analysis, blood stain pattern analysis, …

  2. Mole (unit) - Wikipedia

    https://en.wikipedia.org/wiki/Mole_(unit)

    WebThe mole is widely used in chemistry as a convenient way to express amounts of reactants and products of chemical reactions. For example, the chemical equation 2H 2 + O 2 → 2H 2 O can be interpreted to mean that for each 2 mol dihydrogen ... The name mole is an 1897 translation of the German unit Mol, coined by the chemist Wilhelm Ostwald in 1894 from …

  3. Ninja - Wikipedia

    https://en.wikipedia.org/wiki/Ninja

    WebNinja is the on'yomi (Early Middle Chinese–influenced) reading of the two kanji "忍者". In the native kun'yomi reading, it is pronounced shinobi, a shortened form of shinobi-no-mono (忍びの者).. The word shinobi appears in the written record as far back as the late 8th century in poems in the Man'yōshū. The underlying connotation of shinobi means "to steal away; …

  4. Astatine - Wikipedia

    https://en.wikipedia.org/wiki/Astatine

    WebAstatine is a chemical element with the symbol At and atomic number 85. It is the rarest naturally occurring element in the Earth's crust, occurring only as the decay product of various heavier elements. All of astatine's isotopes are short-lived; the most stable is astatine-210, with a half-life of 8.1 hours. A sample of the pure element has never been …

  5. Hydron (chemistry) - Wikipedia

    https://en.wikipedia.org/wiki/Hydron_(chemistry)

    WebIn chemistry, the hydron, informally called proton, is the cationic form of atomic hydrogen, represented with the symbol H +The general term "hydron", endorsed by the IUPAC, encompasses cations of hydrogen regardless of their isotopic composition: thus it refers collectively to protons (1 H +) for the protium isotope, deuterons (2 H + or D +) for the …

  6. Chemistry Definition & Meaning | Dictionary.com

    https://www.dictionary.com/browse/chemistry

    WebChemistry definition, the science that deals with the composition and properties of substances and various elementary forms of matter. See more.

  7. Graph theory - Wikipedia

    https://en.wikipedia.org/wiki/Graph_theory

    WebIn one restricted but very common sense of the term, a graph is an ordered pair = (,) comprising: , a set of vertices (also called nodes or points); {{,},}, a set of edges (also called links or lines), which are unordered pairs of vertices (that is, an edge is associated with two distinct vertices).To avoid ambiguity, this type of object may be called precisely an …

  8. Persian language - Wikipedia

    https://en.wikipedia.org/wiki/Persian_language

    WebPersian (/ ˈ p ɜːr ʒ ən,-ʃ ən /), also known by its endonym Farsi (فارسی, Fārsī, [fɒːɾˈsiː] ()), is a Western Iranian language belonging to the Iranian branch of the Indo-Iranian subdivision of the Indo-European languages.Persian is a pluricentric language predominantly spoken and used officially within Iran, Afghanistan, and Tajikistan in three mutually intelligible …

  9. -phil- - Wikipedia

    https://en.wikipedia.org/wiki/-phil-

    WebThe Greek root -phil-originates from the Greek word meaning "love". For example, philosophy (along with the Greek root -soph-meaning 'wisdom') is the study of human customs and the significance of life.One of the most common uses of the root -phil-is with philias.. A philia is the love or obsession with a particular thing or subject. The suffix …

  10. Jiffy (time) - Wikipedia

    https://en.wikipedia.org/wiki/Jiffy_(time)

    WebFirst attested in 1780, the word's origin is unclear, though one suggestion is that it was thieves' cant for lightning. ... and often in chemistry, a jiffy is defined as the time taken for light to travel some specified distance. In astrophysics and quantum physics a jiffy is, as defined by Edward R. Harrison, the time it takes for light to travel one fermi, which is …



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