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  2. Bulgars - Wikipedia

    en.wikipedia.org/wiki/Bulgars

    The Bulgars, at least the Danubian Bulgars, had a well-developed clan and military administrative system of "inner" and "outer" tribes, [112] governed by the ruling clan. [113] They had many titles, and according to Steven Runciman the distinction between titles which represented offices and mere ornamental dignities was somewhat vague. [ 114 ]

  3. Orders of magnitude (force) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(force)

    Maximum force of a molecular motor [8] 10 −11 10 −10 ~160 pN Force to break a typical noncovalent bond [8] 10 −9 nanonewton (nN) ~1.6 nN Force to break a typical covalent bond [8] 10 −8 ~82nN Force on an electron in a hydrogen atom [1] 10 −7 ~200nN Force between two 1 meter long conductors, 1 meter apart by an outdated definition of ...

  4. List of body armor performance standards - Wikipedia

    en.wikipedia.org/wiki/List_of_body_armor...

    The VPAM scale as of 2009 runs from 1 to 14, with 1-5 being soft armor, and 6-14 being hard armor. [1] Tested armor must withstand three hits, spaced 120 mm (4.7 inches) apart, of the designated test threat with no more than 25 mm (0.98 inches) of back-face deformation in order to pass.

  5. Hardnesses of the elements (data page) - Wikipedia

    en.wikipedia.org/wiki/Hardnesses_of_the_elements...

    This page was last edited on 16 November 2024, at 12:16 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.

  6. Sermesianoi - Wikipedia

    en.wikipedia.org/wiki/Sermesianoi

    The Sermesianoi or, alternatively, Keramisians were a group of 70,000 Bulgars, Pannonian Avars and Byzantine Christians from Syrmia. They fled in Byzantine region of Macedonia , following a successful revolt against the Avar Khaganate led by the Bulgar noble Kuber , around the year 680.

  7. List of metric units - Wikipedia

    en.wikipedia.org/wiki/List_of_metric_units

    The statohm is a unit of electric resistance equal to 1 statV/statA, corresponding to ~ 898.755 1787 GΩ. The statsiemens or statmho is a unit of electric conductance equal to 1 statA/statV, corresponding to ~ 1.112 646 pS. [6] The stathenry is a unit of electric inductance equal to 1 statV·s/statA, corresponding to ~ 898.755 1787 GH. [7] [6] [a]

  8. Orders of magnitude (energy) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(energy)

    Total mass-energy of 1 microgram of matter (25 kWh) 10 8 1×10 8 J: Kinetic energy of a 55 tonne aircraft at typical landing speed (59 m/s or 115 knots) [citation needed] 1.1×10 8 J: ≈ 1 therm, depending on the temperature [59] 1.1×10 8 J: ≈ 1 Tour de France, or ~90 hours [127] ridden at 5 W/kg [128] by a 65 kg rider [129] 7.3×10 8 J

  9. Seismic magnitude scales - Wikipedia

    en.wikipedia.org/wiki/Seismic_magnitude_scales

    Early USGS/NEIC practice was to measure mb on the first second (just the first few P waves [32]), but since 1978 they measure the first twenty seconds. [33] The modern practice is to measure short-period mb scale at less than three seconds, while the broadband mB BB scale is measured at periods of up to 30 seconds. [34]