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The major diameter is given by 6p 1.2, [4]: 12 rounded to two significant figures in mm and the hex head size (across the flats) is 1.75 times the major diameter. BA sizes are specified by the following British Standards :
As modern studies show, the actual length of a kernel of barley varies from as short as 0.16–0.28 in (4–7 mm) to as long as 0.47–0.59 in (12–15 mm) depending on the cultivar. [ 5 ] [ 6 ] Older sources claimed the average length of a grain of barley was 0.345 in (8.8 mm), while that of a grain of " big " was 0.3245 in (8.24 mm).
A "3 + 1 ⁄ 2-inch" floppy disk's standard dimension is 90 mm, or 3.54 inches, and is advertised to hold "1.44 megabytes" although its capacity is 1,474,560 bytes (1.47456 MB). A " 3 ⁄ 4 -inch pipe" in the Nominal Pipe Size system has no dimensions that are exactly 0.75 inches.
For instance the same angle of 0.1 mrad will subtend 10 mm at 100 meters, 20 mm at 200 meters, etc., or similarly 0.39 inches at 100 m, 0.78 inches at 200 m, etc. Subtensions in mrad based optics are particularly useful together with target sizes and shooting distances in metric units. The most common scope adjustment increment in mrad based ...
There is also an EIA standard for 0.141-inch miniature phone jacks. The 2.5 mm or sub-miniature sizes were similarly popularized on small portable electronics. They often appeared next to a 3.5 mm microphone jack for a remote control on-off switch on early portable tape recorders; the microphone provided with such machines had the on-off switch ...
The Vickers .5 inch machine gun (officially "Gun, Machine, Vickers, .5-in") also known as the Vickers .50 was a large-calibre British automatic weapon. The gun was commonly used as a close-in anti-aircraft weapon on Royal Navy and Allied ships, typically in a four-gun mounting (UK) or two-gun mounting (Dutch), as well as tanks and other armoured fighting vehicles.
The physical group size equivalent to m minutes of arc can be calculated as follows: group size = tan( m / 60 ) × distance. In the example previously given, for 1 minute of arc, and substituting 3,600 inches for 100 yards, 3,600 tan( 1 / 60 ) ≈ 1.047 inches. In metric units 1 MOA at 100 metres ≈ 2.908 centimetres.
Many of these plugs are derived from the "double banana" plug, which consists simply of two banana plugs spaced 3 ⁄ 4 inch (19 mm) apart (measured from center to center of each individual plug). The 3 ⁄ 4 inch spacing originated on General Radio test equipment during the 1920s, and their type 274-M dual-plug is a notable example from that ...