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A catapult is a ballistic device used to launch a projectile a great distance without the aid of gunpowder or other propellants – particularly various types of ancient and medieval siege engines. A catapult uses the sudden release of stored potential energy to propel its payload. Most convert tension or torsion energy that was more slowly and manually built up within the device before release, via springs, bows, twisted rope, elastic, or any of numerous other materials and mechanisms.
The denarius was the standard Roman silver coin from its introduction in the Second Punic War c. 211 BC to the reign of Gordian III, when it was gradually replaced by the antoninianus. It continued to be minted in very small quantities, likely for ceremonial purposes, until and through the Tetrarchy (293–313).
The discus throw, also known as disc throw, is a track and field event in which an athlete throws a heavy disc—called a discus—in an attempt to mark a farther distance than their competitors. It is an ancient sport, as demonstrated by the fifth-century-BC Myron statue Discobolus. Although not part of the modern pentathlon, it was one of the events of the ancient Greek pentathlon, which can be dated back to at least 708 BC, and it is part of the modern decathlon.
The mile, sometimes the international mile or statute mile to distinguish it from other miles, is a British imperial unit and United States customary unit of distance; both are based on the older English unit of length equal to 5,280 English feet, or 1,760 yards. The statute mile was standardised between the British Commonwealth and the United States by an international agreement in 1959, when it was formally redefined with respect to SI units as exactly 1,609.344 metres.
The pound or pound-mass is a unit of mass used in British imperial and United States customary systems of measurement. Various definitions have been used; the most common today is the international avoirdupois pound, which is legally defined as exactly 0.45359237 kilograms, and which is divided into 16 avoirdupois ounces. The international standard symbol for the avoirdupois pound is lb; an alternative symbol is lbm, #, and ℔ or ″̶.
In architecture, post and lintel is a building system where strong horizontal elements are held up by strong vertical elements with large spaces between them. This is usually used to hold up a roof, creating a largely open space beneath, for whatever use the building is designed. The horizontal elements are called by a variety of names including lintel, header, architrave or beam, and the supporting vertical elements may be called columns, pillars, or posts. The use of wider elements at the top of the post, called capitals, to help spread the load, is common to many traditions.
The ounce is any of several different units of mass, weight or volume and is derived almost unchanged from the uncia, an Ancient Roman unit of measurement.
The foot (pl. feet), standard symbol: ft, is a unit of length in the British imperial and United States customary systems of measurement. The prime symbol, ′, is a customarily used alternative symbol. Since the International Yard and Pound Agreement of 1959, one foot is defined as 0.3048 meters exactly. In both customary and imperial units, one foot comprises 12 inches and one yard comprises three feet.
Shekel or sheqel is an ancient Mesopotamian coin, usually of silver. A shekel was first a unit of weight—very roughly 11 grams (0.39 oz)—and became currency in ancient Tyre and ancient Carthage and then in ancient Israel under the Maccabees.
The uncia was a Roman currency worth one twelfth of an as.
The dram is a unit of mass in the avoirdupois system, and both a unit of mass and a unit of volume in the apothecaries' system. It was originally both a coin and a weight in ancient Greece. The unit of volume is more correctly called a fluid dram, fluid drachm, fluidram or fluidrachm.
The talent was a unit of weight that was introduced in Mesopotamia at the end of the 4th millennium BC, and was normalized at the end of the 3rd millennium during the Akkadian-Sumer phase, divided into 60 minas or 3,600 shekels. In classical antiquity, the talent was the heaviest of common weight units for commercial transactions. An Attic weight talent was approximately 26.0 kilograms, and a Babylonian talent was 30.2 kg. Ancient Israel adopted the Babylonian weight talent, but later revised it. The heavy common talent, used in New Testament times, was 58.9 kg. A Roman talent was 1+1⁄3 Attic talents, approximately 32.3 kg ; an Egyptian talent was 80 librae, approximately 27 kg (60 lb).
Greco-Roman, Graeco-Roman, classic wrestling or French wrestling is a style of wrestling that is practiced worldwide. Greco-Roman wrestling was included in the first modern Olympic Games in 1896 and has been in every edition of the summer Olympics held since 1904. This style of wrestling forbids holds below the waist, which is the main feature that differentiates it from freestyle wrestling. This restriction results in an emphasis on throws, because a wrestler cannot use trips to bring an opponent to the ground or hook/grab the opponent's leg to avoid being thrown.
Freestyle wrestling is a style of wrestling. Along with Greco-Roman, it is one of the two styles of wrestling contested in the Olympic Games. American high school and men's college wrestling is conducted under different rules and is termed scholastic and collegiate wrestling. American collegiate women's wrestling is conducted under freestyle rules.
The palm is an obsolete anthropic unit of length, originally based on the width of the human palm and then variously standardized. The same name is also used for a second, rather larger unit based on the length of the human hand.
The mina is an ancient Near Eastern unit of weight, which was divided into 60 shekels. The mina, like the shekel, was also a unit of currency.
Ancient Greek units of measurement varied according to location and epoch. Systems of ancient weights and measures evolved as needs changed; Solon and other lawgivers also reformed them en bloc. Some units of measurement were found to be convenient for trade within the Mediterranean region and these units became increasingly common to different city states. The calibration and use of measuring devices became more sophisticated. By about 500 BC, Athens had a central depository of official weights and measures, the Tholos, where merchants were required to test their measuring devices against official standards.
The ancient Roman units of measurement were primarily founded on the Hellenic system, which in turn was influenced by the Egyptian system and the Mesopotamian system. The Roman units were comparatively consistent and well documented.
The ancient Olympic Games were a series of athletic competitions among representatives of city-states and one of the Panhellenic Games of Ancient Greece. They were held in honor of Zeus, and the Greeks gave them a mythological origin. The originating Olympic Games are traditionally dated to 776 BC. The games were held every four years, or Olympiad, which became a unit of time in historical chronologies. They continued to be celebrated when Greece came under Roman rule, 2nd century BC. Their last recorded celebration was in AD 393, under the emperor Theodosius I, but archeological evidence indicates that some games were still held after this date. The games likely came to an end under Theodosius II, possibly in connection with a fire that burned down the temple of the Olympian Zeus during his reign.
Byzantine units of measurement were a combination and modification of the ancient Greek and Roman units of measurement used in the Byzantine Empire.
References
- ↑ "Duella. Ancient Roman. Mass and Weight Conversion Chart". Archived from the original on 2011-11-25. Retrieved 2011-11-17.
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