Bow (weapon) in the context of "Archery"

In mathematics, a hyperbola is a type of smooth curve lying in a plane, defined by its geometric properties or by equations for which it is the solution set. A hyperbola has two pieces, called connected components or branches, that are mirror images of each other and resemble two infinite bows. The hyperbola is one of the three kinds of conic section, formed by the intersection of a plane and a double cone. (The other conic sections are the parabola and the ellipse. A circle is a special case of an ellipse.) If the plane intersects both halves of the double cone but does not pass through the apex of the cones, then the conic is a hyperbola.

Besides being a conic section, a hyperbola can arise as the locus of points whose difference of distances to two fixed foci is constant, as a curve for each point of which the rays to two fixed foci are reflections across the tangent line at that point, or as the solution of certain bivariate quadratic equations such as the reciprocal relationship ${\displaystyle xy=1.}$ In practical applications, a hyperbola can arise as the path followed by the shadow of the tip of a sundial's gnomon, the shape of an open orbit such as that of a celestial object exceeding the escape velocity of the nearest gravitational body, or the scattering trajectory of a subatomic particle, among others.

Khormusan industry was a Paleolithic archeological industry in Nubia dated at 42,000 to 18,000 BP.

The Khormusan industry in Nubia began between 42,000 and 32,000 BP. Khormusans developed tools not only from stone but also from animal bones and hematite. They also developed small arrow heads resembling those of Native Americans, but no bows have been found. The end of the Khormusan industry came around 18,000 BP, with the appearance of other cultures in the region, including the Gemaian.It was succeeded by the Halfan culture.

The throwing stick or throwing club is a wooden rod with either a pointed tip or a spearhead attached to one end, intended for use as a weapon. A throwing stick can be either straight or roughly boomerang-shaped, and is much shorter than the javelin. It became obsolete as slings and bows became more prevalent, except on the Australian continent, where the native people continued refining the basic design. Throwing sticks shaped like returning boomerangs are designed to fly straight to a target at long ranges, their surfaces acting as airfoils. When tuned correctly they do not exhibit curved flight, but rather they fly on an extended straight flight path. Straight flight ranges greater than 100 m (330 ft) have been reported by historical sources as well as in recent research.

Bowfishing is a fishing technique that uses specialized archery equipment to impale and retrieve fish. A bowfisher will use a bow or crossbow to shoot fish through the water surface with a barbed arrow tethered to a line, and then manually retrieve the line and arrow back, in modern times usually with a reel mounted on the bow. Unlike other popular forms of fishing where baiting and exploiting the fish's instinctual behaviors are important (e.g. angling, netting, trapping, and hand fishing such as noodling), bowfishing is similar to spearfishing and relies purely on the fisherman's own visual perception and marksmanship, and usually do not involve using other tools such as hand net.

Historically, bowfishing was practiced for subsistence, but in the 21st century it has increasingly become an outdoor sport, practiced across the United States, that is prone to unregulated waste and disposal of native species. Bowfishing has also grown in popularity due to social media influencers and YouTube outdoorsman such as the Ozark Outlaws. Sport bowfishing is unregulated and unmanaged as of 2024, but the practice is increasingly gaining attention and study across disciplines. Due to the lethality of the bow or crossbow, catch and release is not possible with bowfishing.

Shooting an apple off one's child's head, also known as the apple-shot (from German Apfelschuss), is a feat of marksmanship with a bow that occurs as a motif in a number of legends in Germanic folklore (and has also been connected with non-European folklore). In the Stith Thompson Motif Index it is F661.3, described as "Skillful marksman shoots apple from man's head" or "apple shot from man's head", though it always occurs in the form of the marksman being ordered to shoot an apple (or occasionally another smaller object) off his own son's head. It is best known as William Tell's feat.

A bowyer is a master-craftsman who makes bows. Though this was once a widespread profession, the importance of bowyers and of bows was diminished by the introduction of gunpowder weaponry. However, the trade has survived and many bowyers continue to produce high-end bows.

A spring is a device consisting of an elastic but largely rigid material (typically metal) bent or molded into a form (especially a coil) that can return into shape after being compressed, extended or twisted. Springs can store energy when compressed, when extended, and/or when twisted. In everyday use, the term most often refers to coil springs, but there are many different spring designs. Modern springs are typically manufactured from spring steel. An example of a non-metallic spring is the bow, made traditionally of flexible yew wood, which when drawn stores energy to propel an arrow.

When a conventional spring, without stiffness variability features, is compressed or stretched from its resting position, it exerts an opposing force approximately proportional to its change in length (this approximation breaks down for larger deflections). The rate or spring constant of a spring is the change in the force it exerts, divided by the change in deflection of the spring. That is, it is the gradient of the force versus deflection curve. An extension or compression spring's rate is expressed in units of force divided by distance, for example or N/m or lbf/in. A torsion spring is a spring that works by twisting; when it is twisted about its axis by an angle, it produces a torque proportional to the angle. A torsion spring's rate is in units of torque divided by angle, such as N·m/rad or ft·lbf/degree. The inverse of spring rate is compliance, that is: if a spring has a rate of 10 N/mm, it has a compliance of 0.1 mm/N. The stiffness (or rate) of springs in parallel is additive, as is the compliance of springs in series.