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  2. Sigma hole interactions - Wikipedia

    en.wikipedia.org/wiki/Sigma_Hole_interactions

    In chemistry, sigma hole interactions (or σ-hole interactions) are a family of intermolecular forces that can occur between several classes of molecules and arise from an energetically stabilizing interaction between a positively-charged site, termed a sigma hole, and a negatively-charged site, typically a lone pair, on different atoms that are not covalently bonded to each other. [1]

  3. Anfinsen's dogma - Wikipedia

    en.wikipedia.org/wiki/Anfinsen's_dogma

    Anfinsen's dogma, also known as the thermodynamic hypothesis, is a postulate in molecular biology. It states that, at least for a small globular protein in its standard physiological environment, the native structure is determined only by the protein's amino acid sequence . [ 1 ]

  4. AP Chemistry - Wikipedia

    en.wikipedia.org/wiki/AP_Chemistry

    The 2014 AP Chemistry exam was the first administration of a redesigned test as a result of a redesigning of the AP Chemistry course. The exam format is now different from the previous years, with 60 multiple choice questions (now with only four answer choices per question), 3 long free response questions, and 4 short free response questions.

  5. Scientific method - Wikipedia

    en.wikipedia.org/wiki/Scientific_method

    A hypothesis is a conjecture based on knowledge obtained while seeking answers to the question. Hypotheses can be very specific or broad but must be falsifiable , implying that it is possible to identify a possible outcome of an experiment or observation that conflicts with predictions deduced from the hypothesis; otherwise, the hypothesis ...

  6. Central limit theorem for directional statistics - Wikipedia

    en.wikipedia.org/wiki/Central_limit_theorem_for...

    Directional statistics is the subdiscipline of statistics that deals with directions (unit vectors in R n), axes (lines through the origin in R n) or rotations in R n. The means and variances of directional quantities are all finite, so that the central limit theorem may be applied to the particular case of directional statistics.

  7. Falsifiability - Wikipedia

    en.wikipedia.org/wiki/Falsifiability

    The answer of Lakatos and many others to that question is that it should. [ BF ] [ BG ] In contradistinction, for Popper, the creative and informal part is guided by methodological rules, which naturally say to favour theories that are corroborated over those that are falsified, [ BH ] but this methodology can hardly be made rigorous.

  8. Directional derivative - Wikipedia

    en.wikipedia.org/wiki/Directional_derivative

    In multivariable calculus, the directional derivative measures the rate at which a function changes in a particular direction at a given point. [citation needed]The directional derivative of a multivariable differentiable (scalar) function along a given vector v at a given point x intuitively represents the instantaneous rate of change of the function, moving through x with a direction ...

  9. Avogadro's law - Wikipedia

    en.wikipedia.org/wiki/Avogadro's_Law

    Avogadro's law (sometimes referred to as Avogadro's hypothesis or Avogadro's principle) or Avogadro-Ampère's hypothesis is an experimental gas law relating the volume of a gas to the amount of substance of gas present. [1] The law is a specific case of the ideal gas law. A modern statement is:

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