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Blade
A blade is the sharp, cutting portion of a tool, weapon, or machine, specifically designed to puncture, chop, slice, or scrape surfaces or materials. Blades are typically made from materials that are harder than those they are intended to cut. This includes early examples made from flaked stones like flint or obsidian, evolving through the ages into metal forms like copper, bronze, and iron, and culminating in modern versions made from steel or ceramics. Serving as one of humanity's oldest tools, blades continue to have wide-ranging applications, including in combat, cooking, and various other everyday and specialized tasks. Blades function by concentrating force at the cutting edge. Design variations, such as serrated edges found on bread knives and saws, serve to enhance this force concentration, adapting blades for specific functions and materials. Blades thus hold a significant place both historically and in contemporary society, reflecting an evolution in material technolo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Exsanguination
Exsanguination is the loss of blood from the circulatory system of a vertebrate, usually leading to death. The word comes from the Latin 'sanguis', meaning blood, and the prefix 'ex-', meaning 'out of'. Exsanguination has long been used as a method of animal slaughter. Humane slaughter must ensure the animal is rendered insensible to pain, whether through a captive bolt or other process, prior to the bloodletting. Depending upon the health of the individual, a person usually dies from losing half to two-thirds of their blood; a loss of roughly one-third of the blood volume is Critical condition, considered very serious. Even a single deep cut can warrant Surgical suture, suturing and Inpatient care, hospitalization, especially if Trauma (medicine), trauma, a vein or artery, or another comorbidity is involved. In the past, bloodletting was a common medical procedure or therapy, now rarely used in medicine. Slaughtering of animals Exsanguination is used as a Animal slaughter, s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elastic Modulus
An elastic modulus (also known as modulus of elasticity (MOE)) is a quantity that describes an object's or substance's resistance to being deformed elastically (i.e., non-permanently) when a stress is applied to it. Definition The elastic modulus of an object is defined as the slope of its stress–strain curve in the elastic deformation region: A stiffer material will have a higher elastic modulus. An elastic modulus has the form: :\delta \ \stackrel\ \frac where stress is the force causing the deformation divided by the area to which the force is applied and strain is the ratio of the change in some parameter caused by the deformation to the original value of the parameter. Since strain is a dimensionless quantity, the units of \delta will be the same as the units of stress. Elastic constants and moduli Elastic constants are specific parameters that quantify the stiffness of a material in response to applied stresses and are fundamental in defining the elastic pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kitchen Knife
A kitchen knife is any knife that is intended to be used in food preparation. While much of this work can be accomplished with a few general-purpose knives — notably a large chef's knife and a smaller serrated blade utility knife — there are also many specialized knives that are designed for specific tasks such as a tough cleaver, a small paring knife, and a bread knife. Kitchen knives can be made from several different materials, though the most common is a hardened steel blade with a wooden handle. Historically, knives were made in "knife cities" that are noted for being the best at their production in that country with the pre-emininent, in Europe, being: Sheffield in Yorkshire, North of England; Thiers, Puy-de-Dôme in the Auvergne of France; Solingen in the Northern Rhineland of Germany; and Eskilstuna of Södermanland County in Sweden. Each of these produced knives in a styles particular to the city, with Thiers especially being noted for the French point of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rapier
A rapier () is a type of sword originally used in Spain (known as ' -) and Italy (known as '' spada da lato a striscia''). The name designates a sword with a straight, slender and sharply pointed two-edged long blade wielded in one hand. It was widely popular in Western Europe throughout the 16th and 17th centuries as a symbol of nobility or gentleman status. It is called because it was carried as an accessory to clothing, generally used for fashion and as a weapon for dueling, self-defense and as a military side arm. Its name is of Spanish origin and appears recorded for the first time in the '' Coplas de la panadera'', by Juan de Mena, written approximately between 1445 and 1450: As fencing spread throughout Western Europe, important sources for rapier fencing arose in Spain, known under the term ("dexterity"), in Italy and France. The French small sword or court sword of the 18th century was a direct continuation of this tradition of fencing. Rapier fencing form ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kukri
The kukri () or khukuri (, ) is a type of knife or short sword with a distinct recurve in its blade that originated in the Indian subcontinent. It serves multiple purposes as a melee weapon and also as a regular cutting/chopping tool throughout most of South Asia. The ''kukri'', ''khukri'', and ''kukkri'' spellings are of Indian English origin. The kukri is the national weapon of Nepal, traditionally serving the role of a basic utility knife for the Nepali language, Nepali-speaking Gurkhas, and consequently is a characteristic weapon of the Nepali Army. There are many myths surrounding the kukri since its earliest recorded use in the 7th century—most notably a traditional custom that the blade must draw blood before being sheathed, when its sole purpose is considered as a fighting weapon. In addition to its use in combat, the kukri is also used for a variety of other purposes. It is used by farmers and laborers for cutting crops and clearing brush, and by hunters for skinnin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Falchion
A falchion (; Old French: ''fauchon''; Latin: ''falx'', "sickle") is a one-handed, backsword, single-edged sword of European origin. Falchions are found in different forms from around the 13th century up to and including the 16th century. In some versions, the falchion looks rather like the seax and later the sabre, and in other versions more like a machete with a crossguard. Types The blade designs of falchions varied widely across the continent and over time. They almost always included a single edge with a slight curve on the blade towards the point on the end and most were also affixed with a quilloned crossguard for the hilt in the manner of the contemporary arming swords. Unlike the double-edged swords of Europe, few actual swords of this type have survived to the present day; fewer than a dozen specimens are currently known. A number of weapons similar to the falchion existed in Western Europe, including the Messer (weapon), Messer, hanger (weapon), hanger and the backs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Khopesh
The ''khopesh'' ('; also vocalized khepesh) is an Egyptian sickle-shaped sword that developed from battle axes. The sword style originated in Western Asia during the Bronze Age and was introduced in the Second Intermediate Period.Lloyd, Alan B. ''A Companion to Ancient Egypt''. Spalinger, Anothony J. Ch 23. "Military Institutions and Warfare: Pharaonic". Newark, United Kingdom: John Wiley & Sons, 2010.Van De Mieroop, Marc. ''A History of Ancient Egypt''. John Wiley & Sons, 2021. p. 126. The ''khopesh'' became more common in the New Kingdom, and is often depicted with kings in statues and murals. Etymology The word ''khopesh'' may have been derived from "leg", as in "leg of beef", because of their similarity in shape. The hieroglyph for ''ḫpš'' ('leg') is found as early as during the time of the Coffin Texts (the First Intermediate Period). Coffin Texts: However, on the 196 BC Rosetta Stone, it is referenced as the "sword" determinative in a hieroglyph block, with t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Talwar
The talwar (), also spelled talwaar and tulwar, is a type of curved sword or sabre from the Indian subcontinent. Etymology and classification The word ''talwar'' originated from the Sanskrit Language, Sanskrit word ''taravāri'' () which means "one-edged sword". It is the word for ''sword'' in several related languages, such as Hindustani language, Hindustani (Hindi and Urdu), Nepali language, Nepali, Marathi language, Marathi, Gujarati language, Gujarati, Punjabi language, Punjabi, etc. and as () in Bengali language, Bengali. Like many swords from around the world with an etymology derived from a term meaning simply 'sword', the talwar has in scholarship, and in museum and collector usage, acquired a more specific meaning. However, South Asian swords, while showing a rich diversity of forms, suffer from relatively poor dating (so developmental history is obscure) and a lack of precise nomenclature and classification. The typical talwar is a type of sabre, characterised by a c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whale Knife Hg
Whales are a widely distributed and diverse group of fully aquatic placental marine mammals. As an informal and colloquial grouping, they correspond to large members of the infraorder Cetacea, i.e. all cetaceans apart from dolphins and porpoises. Dolphins and porpoises may be considered whales from a formal, cladistic perspective. Whales, dolphins and porpoises belong to the order Cetartiodactyla, which consists of even-toed ungulates. Their closest non-cetacean living relatives are the hippopotamuses, from which they and other cetaceans diverged about 54 million years ago. The two parvorders of whales, baleen whales (Mysticeti) and toothed whales (Odontoceti), are thought to have had their last common ancestor around 34 million years ago. Mysticetes include four extant (living) families: Balaenopteridae (the rorquals), Balaenidae (right whales), Cetotheriidae (the pygmy right whale), and Eschrichtiidae (the grey whale). Odontocetes include the Monodontidae (belugas and narw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pressure
Pressure (symbol: ''p'' or ''P'') is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Gauge pressure (also spelled ''gage'' pressure)The preferred spelling varies by country and even by industry. Further, both spellings are often used ''within'' a particular industry or country. Industries in British English-speaking countries typically use the "gauge" spelling. is the pressure relative to the ambient pressure. Various #Units, units are used to express pressure. Some of these derive from a unit of force divided by a unit of area; the International System of Units, SI unit of pressure, the Pascal (unit), pascal (Pa), for example, is one newton (unit), newton per square metre (N/m2); similarly, the Pound (force), pound-force per square inch (Pound per square inch, psi, symbol lbf/in2) is the traditional unit of pressure in the imperial units, imperial and United States customary units, US customary systems. Pressure ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Force
In physics, a force is an influence that can cause an Physical object, object to change its velocity unless counterbalanced by other forces. In mechanics, force makes ideas like 'pushing' or 'pulling' mathematically precise. Because the Magnitude (mathematics), magnitude and Direction (geometry, geography), direction of a force are both important, force is a Euclidean vector, vector quantity. The SI unit of force is the newton (unit), newton (N), and force is often represented by the symbol . Force plays an important role in classical mechanics. The concept of force is central to all three of Newton's laws of motion. Types of forces often encountered in classical mechanics include Elasticity (physics), elastic, frictional, Normal force, contact or "normal" forces, and gravity, gravitational. The rotational version of force is torque, which produces angular acceleration, changes in the rotational speed of an object. In an extended body, each part applies forces on the adjacent pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
