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The 120 film format is a roll film which is nominally between 60.7 mm and 61.7 mm wide. Most modern films made today are roughly 61 mm (2.4 inches) wide. The film is held in an open spool originally made of wood with metal flanges, later with all-metal, and finally with all-plastic. The length of the film is nominally between 820 millimetres ...
The international roughness index (IRI) is the roughness index most commonly obtained from measured longitudinal road profiles. It is calculated using a quarter-car vehicle math model, whose response is accumulated to yield a roughness index with units of slope (in/mi, m/km, etc.). [1][2] Although a universal term, IRI is calculated per ...
The actual size of the drive bays differ from their name (e.g., 3 1 ⁄ 2" drive bays are actually 4 inches (101.6 mm) wide, because 3 1 ⁄ 2" refers to the historical platter diameter inside the drive). The newer 2 1 ⁄ 2 inch and 1.8 inch drive bays are specified in
1 / 36 yd or 1 / 12 ft. Metric (SI) units. 25.4 mm. A fire hydrant marked as 3-inch. The inch (symbol: in or ″) is a unit of length in the British Imperial and the United States customary systems of measurement. It is equal to 1 36 yard or 1 12 of a foot. Derived from the Roman uncia ("twelfth"), the word inch is ...
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 ...
The centimetre (SI symbol: cm) is a unit of length in the metric system equal to 10−2 metres ( 1 100 m = 0.01 m). To help compare different orders of magnitude, this section lists lengths between 10 −2 m and 10 −1 m (1 cm and 1 dm). 1 cm – 10 millimetres. 1 cm – 0.39 inches. 1 cm – edge of a square of area 1 cm 2.
2.256 mm 88.81 thou 1 ⁄ 12 of a pouce. This corresponds to the line, a traditional English unit. pouce: 1 ⁄ 12: 27.07 mm 1.066 in 1 ⁄ 12 of a pied du roi. This corresponds to the inch, a traditional English unit. pied du roi: 1 32.48 cm 1.066 ft Commonly abbreviated to pied, this corresponds to the foot, a traditional English unit.
To help compare different orders of magnitude this page lists lengths between 10 −3 and 10 −2 m (1 mm and 1 cm). 1.0 mm — 1 / 1000 of a metre; 1.0 mm — 0.039 37 inches or 5 ⁄ 127 (exactly) 1.0 mm — side of square of area 1 mm 2; 1.0 mm — diameter of a pinhead; 1.5 mm — length of average flea