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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 millimeters; 1 cm – 0.39 inches; 1 cm – edge of a square of area 1 cm 2
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
The Type 96 was most effective when used at ranges of 1,000 meters or less. The Japanese military estimated that it required an average of 1,500 rounds to shoot down an aircraft at a height of 1,000 meters and a range of 2,000 meters, and that fire beyond that range was completely ineffective.
The gauss is the unit of magnetic flux density B in the system of Gaussian units and is equal to Mx/cm 2 or g/Bi/s 2, while the oersted is the unit of H-field. One tesla (T) corresponds to 10 4 gauss, and one ampere (A) per metre corresponds to 4π × 10 −3 oersted .
Finally, the intermediate, or "short shell," weighed half as much as the high-explosive shell and was fitted with a ballistic tip for range and accuracy. Shells for the 42 cm guns were generally 1.5 m (4.9 ft) long, weighed between 400 and 1,160 kg (880 and 2,560 lb), and were propelled via primer loaded into the gun with a brass casing.
This lowered initial velocity from 605 to 538 m/s, but increased the punch of the gun. [8] To put these results into perspective, a comparison was made between the old 15 cm Ring Kanonen and the new long Mantel Ring Kanonen. E.g. the projectile of the 15 cm L/35 had a total vis viva of 752 meter ton while that of the RK L/25 had 440. As one of ...
The femtometre (American spelling femtometer), symbol fm, [1] [2] (derived from the Danish and Norwegian word femten 'fifteen', Ancient Greek: μέτρον, romanized: metron, lit.
Portrait of Anders Ångström [15]. In 1868, Swedish physicist Anders Jonas Ångström created a chart of the spectrum of sunlight, in which he expressed the wavelengths of electromagnetic radiation in the electromagnetic spectrum in multiples of one ten-millionth of a millimetre (or 10 −7 mm.) [16] [17] Ångström's chart and table of wavelengths in the solar spectrum became widely used in ...