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  2. Bulk density - Wikipedia

    en.wikipedia.org/wiki/Bulk_density

    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 by the bulk volume. Bulk volume is defined as the total volume the particles occupy, including particle's own volume, inter-particle void volume, and the particles' internal pore volume.

  3. Specific surface area - Wikipedia

    en.wikipedia.org/wiki/Specific_surface_area

    Ceramic Raschig rings.....and plastic Białecki rings of increased SSA. Values obtained for specific surface area depend on the method of measurement. In adsorption based methods, the size of the adsorbate molecule (the probe molecule), the exposed crystallographic planes at the surface and measurement temperature all affect the obtained specific surface area. [4]

  4. Gassmann's equation - Wikipedia

    en.wikipedia.org/wiki/Gassmann's_equation

    Gassmann's equations are a set of two equations describing the isotropic elastic constants of an ensemble consisting of an isotropic, homogeneous porous medium with a fully connected pore space, saturated by a compressible fluid at pressure equilibrium.

  5. Porosity - Wikipedia

    en.wikipedia.org/wiki/Porosity

    Porosity of surface soil typically decreases as particle size increases. This is due to soil aggregate formation in finer textured surface soils when subject to soil biological processes. Aggregation involves particulate adhesion and higher resistance to compaction. Typical bulk density of sandy soil is between 1.5 and 1.7 g/cm 3. This ...

  6. Particle-size distribution - Wikipedia

    en.wikipedia.org/wiki/Particle-size_distribution

    This technique has been used for decades in the air pollution control industry (data used for design of control devices). This technique determines particle size as a function of settling velocity in an air stream (as opposed to water, or some other liquid). Disadvantages: a bulk sample (about ten grams) must be obtained. It is a fairly time ...

  7. Specific weight - Wikipedia

    en.wikipedia.org/wiki/Specific_weight

    The specific weight, also known as the unit weight (symbol γ, the Greek letter gamma), is a volume-specific quantity defined as the weight W divided by the volume V of a material: = / Equivalently, it may also be formulated as the product of density, ρ, and gravity acceleration, g: = Its unit of measurement in the International System of Units (SI) is newton per cubic metre (N/m 3), with ...

  8. Particle mass density - Wikipedia

    en.wikipedia.org/wiki/Particle_mass_density

    The particle mass density or particle density of a material (such as particulate solid or powder) is the mass density of the particles that make up the powder. Particle density is in contrast to the bulk density, which measures the average density of a large volume of the powder in a specific medium (usually air).

  9. Plasma parameters - Wikipedia

    en.wikipedia.org/wiki/Plasma_parameters

    Temperature is a statistical quantity whose formal definition is = (),, or the change in internal energy with respect to entropy, holding volume and particle number constant. A practical definition comes from the fact that the atoms, molecules, or whatever particles in a system have an average kinetic energy.

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