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The specific strength is a material's (or muscle's) strength (force per unit area at failure) divided by its density. It is also known as the strength-to-weight ratio or strength/weight ratio or strength-to-mass ratio. In fiber or textile applications, tenacity is the usual measure of specific strength. The SI unit for specific strength is Pa ...
As 99.9% pure thorium oxide, price per thorium contained. Free on Board port of entry, duty paid. 91: Pa: Protactinium: 15.37: 1.4×10 −6 [i] (3.878 × 10 10 kg) No reliable price available. In 1959–1961 Great Britain Atomic Energy Authority produced 125 g of 99.9% pure protactinium at a cost of $ 500 000, giving the cost of 4 000 000 USD ...
Kevlar (para-aramid) [2] is a strong, heat-resistant synthetic fiber, related to other aramids such as Nomex and Technora. Developed by Stephanie Kwolek at DuPont in 1965, [ 3 ] [ 2 ] [ 4 ] the high-strength material was first used commercially in the early 1970s as a replacement for steel in racing tires.
The Small Arms Protective Insert (SAPI) is a ceramic ballistic plate used by the United States Armed Forces. It was first used in the Ranger Body Armor and Interceptor Body Armor, both are ballistic vests. It is now also used in the Improved Outer Tactical Vest as well as the Modular Tactical Vest, in addition to commercially available "plate ...
This model is 3.28 kg (7.2 lb). The Laminated Varmint features a Grey Laminated stock and is only available in .223 Remington, it weighs 3.62 kg (8.0 lb). [2] The last styling of the Varmint model is known as the Kevlar model. The primary difference is the stock is made of a Kevlar composite manufactured by H-S Precision.
The Advanced Combat Helmet (ACH) is the United States Army 's current combat helmet, used since the early 2000s. It was developed by the United States Army Soldier Systems Center, [2] the U.S. Army Special Operations Command, [3] and the U.S. Army Research Laboratory [4] to be the next generation of protective combat helmets for use by the ...
First issued in 1983 to replace the M1 helmet. Former kevlar helmet used by the United States Army, Marine Corps, Navy. Used by the USAF, but is being phased out by the ACH [46] US Air Force. [47] Adopted by the Mexican Armed Forces in the 1990s to replace the M1 helmet. Replaced the M1 helmet of the Argentine army and modified with padded ...
Aramid. Spools of aramid yarn destined for body armor. Fiberglass-aramid hybrid cloth. Aramid fibers, short for aromatic polyamide, are a class of heat-resistant and strong synthetic fibers. They are used in aerospace and military applications, for ballistic-rated body armor fabric and ballistic composites, in marine cordage, marine hull ...