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  2. Fountas and Pinnell reading levels - Wikipedia

    en.wikipedia.org/wiki/Fountas_and_Pinnell...

    A meta-analysis of 21 studies found that the F&P Text Level Gradient system did not lead to effective reading fluency interventions. [ 8 ] Matthew Burns, a reading researcher at the University of Florida, has studied assessments within the F&P Text Level Gradient system and found that they result in 54% total accuracy and correctly identify low ...

  3. Particle-size distribution - Wikipedia

    en.wikipedia.org/wiki/Particle-size_distribution

    In granulometry, the particle-size distribution (PSD) of a powder, or granular material, or particles dispersed in fluid, is a list of values or a mathematical function that defines the relative amount, typically by mass, of particles present according to size. [1]

  4. p-chart - Wikipedia

    en.wikipedia.org/wiki/P-chart

    The p-chart only accommodates "pass"/"fail"-type inspection as determined by one or more go-no go gauges or tests, effectively applying the specifications to the data before they are plotted on the chart. Other types of control charts display the magnitude of the quality characteristic under study, making troubleshooting possible directly from ...

  5. Planck units - Wikipedia

    en.wikipedia.org/wiki/Planck_units

    Table 2 offers a sample of derived Planck units, some of which are seldom used. As with the base units, their use is mostly confined to theoretical physics because most of them are too large or too small for empirical or practical use and there are large uncertainties in their values.

  6. Pressure - Wikipedia

    en.wikipedia.org/wiki/Pressure

    The effects of an external pressure of 700 bar on an aluminum cylinder with 5 mm (0.197 in) wall thickness. As an example of varying pressures, a finger can be pressed against a wall without making any lasting impression; however, the same finger pushing a thumbtack can easily damage the wall. Although the force applied to the surface is the ...

  7. Piping and instrumentation diagram - Wikipedia

    en.wikipedia.org/wiki/Piping_and_instrumentation...

    The drawing template shown below, actual size 225.mm by 111 mm, is typical of those used to draw P&IDs. Piping and instrumentation diagram manual drawing template (1980s). Symbol key:

  8. Triphenylphosphine - Wikipedia

    en.wikipedia.org/wiki/Triphenylphosphine

    Triphenylphosphine (IUPAC name: triphenylphosphane) is a common organophosphorus compound with the formula P(C 6 H 5) 3 and often abbreviated to P Ph 3 or Ph 3 P. It is versatile compound that is widely used as a reagent in organic synthesis and as a ligand for transition metal complexes, including ones that serve as catalysts in organometallic chemistry.

  9. Maxwell–Boltzmann distribution - Wikipedia

    en.wikipedia.org/wiki/Maxwell–Boltzmann...

    For a system containing a large number of identical non-interacting, non-relativistic classical particles in thermodynamic equilibrium, the fraction of the particles within an infinitesimal element of the three-dimensional velocity space d 3 v, centered on a velocity vector of magnitude , is given by = [] / ⁡ , where: