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Arrowheads are attached to arrow shafts to be shot from a bow; similar types of projectile points may be attached to a spear and "thrown" by means of an atlatl (spear thrower). The arrowhead or projectile point is the primary functional part of the arrow, and plays the largest role in determining its purpose. Some arrows may simply use a ...
In Africa, many arrow poisons are made from plants that contain cardiac glycosides, such as Acokanthera (possessing ouabain), oleander (Nerium oleander), milkweeds , or Strophanthus, all of which are in the family Apocynaceae. [1] Inee or onaye is a poison made from Strophanthus hispidus, which contains the cardiac glycoside strophanthin.
Traditional target arrow (top) and replica medieval arrow (bottom) Modern arrow with plastic fletchings and nock An arrow is a fin-stabilized projectile launched by a bow.A typical arrow usually consists of a long, stiff, straight shaft with a weighty (and usually sharp and pointed) arrowhead attached to the front end, multiple fin-like stabilizers called fletchings mounted near the rear, and ...
[6] [7] In addition, Bane's testing demonstrated that a bodkin point arrow would also be able to penetrate plate armor of minimum thickness (1.2 mm), although likely not lethally. [6] However, the arrowheads used in the Bane test were made of steel, while research by the Royal Armouries and the Historical Metallurgy Society suggests that a ...
Natural uranium contains about 0.72% 235 U. Depleted uranium has lower mass fractions—up to three times less—of 235 U and 234 U than natural uranium. Since 238 U has a much longer half-life than the lighter isotopes, DU is about 40% less radioactive than natural uranium.
The initial test pits were dug by hand, but this proved to be dangerous work and an alternative was needed to drill through the up to 210 feet (64 m) thick ice cap more safely. The answer was a diamond tipped drilling machine, but, being a heavy machine, it could not be carried up the newly completed horse and mule trail like other supplies.
An alternate method under development is called an "anti-phase destructive interference generator." [citation needed] The process duplicates the sound waves generated by the muzzle blast and then uses them to create an anti-phase auditory signal. Currently, this is a muzzle attached device and is only being tested to cancel out the gunshot ...
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