• volumetric number density, two-dimensional areal number density, or one-dimensional linear number density. Population density is an example of areal number density...
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  • Density (volumetric mass density or specific mass) is a substance's mass per unit of volume. The symbol most often used for density is ρ (the lower case...
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  • particle number density (or particle number concentration PNC), a quantity of kind volumetric number density obtained by dividing the particle number of a...
    4 KB (446 words) - 21:10, 23 July 2024
  • The area density (also known as areal density, surface density, superficial density, areic density, mass thickness, column density, or density thickness)...
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  • The density of air or atmospheric density, denoted ρ, is the mass per unit volume of Earth's atmosphere. Air density, like air pressure, decreases with...
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  • In materials science, bulk density, also called apparent density, is a material property defined as the mass of the many particles of the material divided...
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  • (dimension) and a pixel density (ppi). Since most digital hardware devices use dots or pixels, the size of the media (in inches) and the number of pixels (or dots)...
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  • chip. The transistor density is the number of transistors that are fabricated per unit area, typically measured in terms of the number of transistors per...
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  • Thumbnail for List of countries and dependencies by population density
    This is a list of countries and dependencies ranked by population density, sorted by inhabitants per square kilometre or square mile. The list includes...
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  • Thumbnail for Probability density function
    In probability theory, a probability density function (PDF), density function, or density of an absolutely continuous random variable, is a function whose...
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  • Thumbnail for Charge density
    is to clarify that the density is for electric charge, not other densities like mass density, number density, probability density, and prevent conflict...
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  • Thumbnail for Population density
    in low population densities are: Increased problems with locating sexual mates Increased inbreeding Population density is the number of people per unit...
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  • Thumbnail for Current density
    electromagnetism, current density is the amount of charge per unit time that flows through a unit area of a chosen cross section. The current density vector is defined...
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  • Particle density (particle count), number of particles per unit volume Area-specific quantity, the quotient of a physical quantity and area Current density, the...
    4 KB (495 words) - 02:52, 16 October 2023
  • Thumbnail for High-density polyethylene
    High-density polyethylene (HDPE) or polyethylene high-density (PEHD) is a thermoplastic polymer produced from the monomer ethylene. It is sometimes called...
    15 KB (1,493 words) - 21:16, 29 August 2024
  • Thumbnail for Linear density
    as the mass in grams per 10,000 meters Density Area density Columnar density Paper density Linear number density Patt, D.H. (1958). "Findings and Recommendations...
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  • Nuclear density is the density of the nucleus of an atom. For heavy nuclei, it is close to the nuclear saturation density n 0 = 0.15 ± 0.01 {\displaystyle...
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  • physiological density or real population density is the number of people per unit area of arable land. A higher physiological density suggests that the...
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  • Absorbance (redirect from Optical density)
    units), its shade number would be 8. Absorptance Tunable Diode Laser Absorption Spectroscopy (TDLAS) Densitometry Neutral density filter Mathematical...
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  • Thumbnail for Bone density
    Bone density, or bone mineral density, is the amount of bone mineral in bone tissue. The concept is of mass of mineral per volume of bone (relating to...
    18 KB (1,936 words) - 16:33, 20 July 2024
  • Thumbnail for Spectral density
    is finite, one may compute the energy spectral density. More commonly used is the power spectral density (PSD, or simply power spectrum), which applies...
    36 KB (5,666 words) - 05:12, 24 September 2024
  • Thumbnail for Kinetic theory of gases
    have uniform number densities, but the upper region has a higher number density than the lower region. In the steady state, the number density at any point...
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  • the city limits of the city. The population density of the cities listed is based on the average number of people living per square kilometer or per...
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  • average number of particles in unit volume or unit area Number density This disambiguation page lists articles associated with the title Particle density. If...
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  • In number theory, natural density, also referred to as asymptotic density or arithmetic density, is one method to measure how "large" a subset of the set...
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  • Thumbnail for Avogadro constant
    estimating the number of particles in a given volume of gas. This value, the number density n0 of particles in an ideal gas, is now called the Loschmidt constant...
    20 KB (2,232 words) - 18:43, 14 October 2024
  • Thumbnail for Cosmic microwave background
    by a factor of 400 to 1;: 5  the number density of photons in the CMB is one billion times (109) the number density of matter in the universe. Without...
    108 KB (13,172 words) - 18:52, 18 September 2024
  • Thumbnail for Fermi gas
    in a Fermi gas in thermal equilibrium, and is characterized by their number density, temperature, and the set of available energy states. The model is named...
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  • Thumbnail for List of states and territories of the United States by population density
    District of Columbia by population density, population size, and land area. It also includes a sortable table of density by states, territories, divisions...
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  • molecular weights are divided by this number to derive their vapour density. For example, acetone has a vapour density of 2 in relation to air. That means...
    3 KB (398 words) - 08:55, 10 August 2024