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  2. Orders of magnitude (length) - Wikipedia

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

    To help compare different orders of magnitude, this section lists lengths between 10 centimeters and 100 centimeters (10 −1 meter and 1 meter). Conversions 10 centimeters (abbreviated to 10 cm) is equal to:

  3. Milliradian - Wikipedia

    en.wikipedia.org/wiki/Milliradian

    In firearm optics, where 0.1 mrad per click is the most common mrad based adjustment value, another common rule of thumb is that an adjustment of ⁠ 1 / 10 ⁠ mrad changes the impact as many centimeters as there are hundreds of meters. In other words, 1 cm at 100 meters, 2.25 cm at 225 meters, 0.5 cm at 50 meters, etc. See the table below

  4. Shaku (unit) - Wikipedia

    en.wikipedia.org/wiki/Shaku_(unit)

    The shaku had been standardized as 30.3 cm (11.93 in) since 1891. [5] This means that there are about 3.3 shaku (10 ⁄ 33) to one meter. [6] [7]This definition was established by Meiji government law; until then, even though the unit was given the same name, its length varied depending on the era.

  5. Hawaiian scale - Wikipedia

    en.wikipedia.org/wiki/Hawaiian_scale

    Thus, a "3-foot" wave is roughly six feet high (in actuality a height of ~1.8 m), i.e., head-high to a 6-foot (~180 cm) person; a "2-foot" wave is roughly four feet high (height of ~1.2 m), i.e., chest-high to such a person; and a "6- to 8-foot" wave would be 2 to approaching 3 times head-high to such a person (height of ~3.5 to 5 m). As wave ...

  6. Aortic valve area calculation - Wikipedia

    en.wikipedia.org/wiki/Aortic_valve_area_calculation

    From these, it is easy to calculate the area (in cm 2) of the aortic valve by simply dividing the LV stroke volume (in cm 3) by the AV VTI (in cm) measured on the spectral Doppler display using continuous-wave Doppler. [citation needed] Stroke volume = 0.785(π/4) x Diameter 2 x VTI of LVOT Cross sectional area of LVOT = 0.785(π/4) x LVOT ...

  7. French catheter scale - Wikipedia

    en.wikipedia.org/wiki/French_catheter_scale

    The French scale, also known as the French gauge or Charrière system, is a widely used measurement system for the size of catheters.It is commonly abbreviated as Fr but may also be abbreviated as Fg, FR or F, and less frequently as CH or Ch (referencing its inventor, Charrière).

  8. Grade (slope) - Wikipedia

    en.wikipedia.org/wiki/Grade_(slope)

    d = run Δh = rise l = slope length α = angle of inclination. The grade (US) or gradient (UK) (also called stepth, slope, incline, mainfall, pitch or rise) of a physical feature, landform or constructed line is either the elevation angle of that surface to the horizontal or its tangent.

  9. Chain (unit) - Wikipedia

    en.wikipedia.org/wiki/Chain_(unit)

    The UK statute chain is 22 yards, which is 66 feet (20.1168 m). This unit is a statute measure in the United Kingdom, defined in the Weights and Measures Act 1985. [6] One link is a hundredth part of a chain, which is 7.92 inches (20.1168 cm).