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  2. Number density - Wikipedia

    en.wikipedia.org/wiki/Number_density

    The number density (symbol: n or ρN) is an intensive quantity used to describe the degree of concentration of countable objects (particles, molecules, phonons, cells, galaxies, etc.) in physical space: three-dimensional volumetric number density, two-dimensional areal number density, or one-dimensional linear number density.

  3. List of Roblox games - Wikipedia

    en.wikipedia.org/wiki/List_of_Roblox_games

    MeepCity was the first game on Roblox to pass 1 billion total visits. [61] The game was averaging 100,000 concurrent players in July 2018. [60] The game received criticism throughout 2021 due to the number of online daters inside the game and inappropriate clothing and actions found in the party feature. This caused the game to be placed as ...

  4. Loschmidt constant - Wikipedia

    en.wikipedia.org/wiki/Loschmidt_constant

    The Loschmidt constant or Loschmidt's number (symbol: n0) is the number of particles (atoms or molecules) of an ideal gas per volume (the number density), and usually quoted at standard temperature and pressure. The 2018 CODATA recommended value [1] is 2.686 780 111... × 1025 m−3 at 0 °C and 1 atm. It is named after the Austrian physicist ...

  5. Roblox - Wikipedia

    en.wikipedia.org/wiki/Roblox

    Type. Game creation system, massively multiplayer online game. Roblox (/ ˈroʊblɒks / ROH-bloks) is an online game platform and game creation system developed by Roblox Corporation that allows users to program and play games created by themselves or other users. Created by David Baszucki and Erik Cassel in 2004 and released in 2006, the ...

  6. Natural density - Wikipedia

    en.wikipedia.org/wiki/Natural_density

    A subset A of positive integers has natural density α if the proportion of elements of A among all natural numbers from 1 to n converges to α as n tends to infinity.. More explicitly, if one defines for any natural number n the counting function a(n) as the number of elements of A less than or equal to n, then the natural density of A being α exactly means that [1]

  7. Prandtl number - Wikipedia

    en.wikipedia.org/wiki/Prandtl_number

    The Prandtl number (Pr) or Prandtl group is a dimensionless number, named after the German physicist Ludwig Prandtl, defined as the ratio of momentum diffusivity to thermal diffusivity. [1] The Prandtl number is given as: where: ν {\displaystyle \nu } : momentum diffusivity (kinematic viscosity),

  8. Half-normal distribution - Wikipedia

    en.wikipedia.org/wiki/Half-normal_distribution

    The half-normal distribution is a special case of the generalized gamma distribution with d = 1, p = 2, a =. 2 σ {\displaystyle {\sqrt {2}}\sigma } . If Y has a half-normal distribution, Y -2 has a Lévy distribution. The Rayleigh distribution is a moment-tilted and scaled generalization of the half-normal distribution.

  9. Central limit theorem - Wikipedia

    en.wikipedia.org/wiki/Central_limit_theorem

    The scaled sum of a sequence of i.i.d. random variables with finite positive variance converges in distribution to the normal distribution. In probability theory, the central limit theorem (CLT) states that, under appropriate conditions, the distribution of a normalized version of the sample mean converges to a standard normal distribution.