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  2. List of unusual units of measurement - Wikipedia

    en.wikipedia.org/wiki/List_of_unusual_units_of...

    In most US cities, a city block is between 1 ⁄ 16 and 1 ⁄ 8 mi (100 and 200 m). In Manhattan, the measurement "block" usually refers to a north–south block, which is 1 ⁄ 20 mi (80 m). Sometimes people living in places (like Manhattan) with a regularly spaced street grid will speak of long blocks and short blocks.

  3. R-value (insulation) - Wikipedia

    en.wikipedia.org/wiki/R-value_(insulation)

    Installed faced fiberglass batt insulation with its R-value visible (R-21) [1]. The R-value (in K⋅m 2 /W) is a measure of how well a two-dimensional barrier, such as a layer of insulation, a window or a complete wall or ceiling, resists the conductive [2] flow of heat, in the context of construction. [3]

  4. Polycarbonate - Wikipedia

    en.wikipedia.org/wiki/Polycarbonate

    extrusion with cylinders into sheets (0.5–20 mm (0.020–0.787 in)) and films (below 1 mm (0.039 in)), which can be used directly or manufactured into other shapes using thermoforming or secondary fabrication techniques, such as bending, drilling, or routing. Due to its chemical properties it is not conducive to laser-cutting.

  5. 12 mm caliber - Wikipedia

    en.wikipedia.org/wiki/12_mm_caliber

    This is a list of firearm cartridges which have bullets in the 12 millimetres (0.47 in) to 12.99 millimetres (0.511 in) caliber range.. Length refers to the cartridge case length.

  6. TNT equivalent - Wikipedia

    en.wikipedia.org/wiki/TNT_equivalent

    The "kiloton (of TNT equivalent)" is a unit of energy equal to 4.184 terajoules (4.184 × 10 12 J). [2] A kiloton of TNT can be visualized as a cube of TNT 8.46 metres (27.8 ft) on a side. The " megaton (of TNT equivalent)" is a unit of energy equal to 4.184 petajoules ( 4.184 × 10 15 J ).

  7. Aspect ratio (image) - Wikipedia

    en.wikipedia.org/wiki/Aspect_ratio_(image)

    The film itself is 35 mm wide (1.38 in), but the area between the perforations is 24.89 mm × 18.67 mm (0.980 in × 0.735 in), leaving the de facto ratio of 1.33:1. [ 3 ] With a space designated for the standard optical soundtrack , and the frame size reduced to maintain an image that is wider than tall; this resulted in the Academy aperture of ...

  8. Spanish peseta - Wikipedia

    en.wikipedia.org/wiki/Spanish_peseta

    The peseta linked its value with the euro coin on 1 January 1999, and hit rock bottom that year when Pts 200 were required to buy US$1. [15] At the time Euro became a material coin, Pts 185.29 were needed to buy US$1, that is, 1.1743 euros.

  9. 10 mm caliber - Wikipedia

    en.wikipedia.org/wiki/10_mm_caliber

    11 mm» This is a list of firearm cartridges which have bullets in the 10 millimetres (0.39 in) to 10.99 millimetres (0.433 in) caliber range. Length refers to the cartridge case length.