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Omani Rial
The Omani rial (, ISO 4217 code OMR) is the currency of Oman. It is divided into 1000 ''paisa, baisa'' (also written ''baiza'', ). Fixed exchange rate From 1973 to 1986, the rial was pegged to the United States dollar, U.S. dollar at 1 Omani rial = US$2.895. The rate was changed in 1986 to 1 Omani rial = US$2.6008, which translates to approximately US$1 = 0.384497 rial. It is as of 2024 the third-highest-valued currency unit in the world after the Kuwaiti dinar and the Bahraini dinar. As of 2025 still, the Central Bank of Oman bought U.S. dollars at 0.384 Omani rial, and sold U.S. dollars at 0.385 Omani rial. History Until 1940, the Indian rupee and the Maria Theresa thaler (known locally as the rial due to its similar size to the Spanish dollar, Spanish eight-real coin) were the main currencies circulating in Muscat and Oman, as the state was then known, with Indian rupees circulating on the coast and thaler in the interior. Maria Theresa thaler were valued at 230 paisa, with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
US Dollar
The United States dollar (symbol: $; currency code: USD) is the official currency of the United States and several other countries. The Coinage Act of 1792 introduced the U.S. dollar at par with the Spanish silver dollar, divided it into 100 cents, and authorized the minting of coins denominated in dollars and cents. U.S. banknotes are issued in the form of Federal Reserve Notes, popularly called greenbacks due to their predominantly green color. The U.S. dollar was originally defined under a bimetallic standard of (0.7734375 troy ounces) fine silver or, from 1834, fine gold, or $20.67 per troy ounce. The Gold Standard Act of 1900 linked the dollar solely to gold. From 1934, its equivalence to gold was revised to $35 per troy ounce. In 1971 all links to gold were repealed. The U.S. dollar became an important international reserve currency after the First World War, and displaced the pound sterling as the world's primary reserve currency by the Bretton Woods Ag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aluminium Bronze
Aluminium bronze is a type of bronze in which aluminium is the main alloying metal added to copper (for alloys with aluminum as the major component, see aluminum copper alloy), in contrast to standard bronze (copper and tin) or brass (copper and zinc). A variety of aluminium bronzes of differing compositions have found industrial use, with most ranging from 5% to 11% aluminium by weight, the remaining mass being copper; other alloying agents such as iron, nickel, manganese, and silicon are also sometimes added to aluminium bronzes. Compositions The following table lists the most common standard aluminium bronze wrought alloy compositions, by ISO 428 designations. The percentages show the proportional composition of the alloy by weight. Copper is the remainder by weight and is not listed: Material properties Aluminium bronzes are most valued for their higher strength and corrosion resistance as compared to other bronze alloys. These alloys are tarnish-resistant and show low ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cupronickel
Cupronickel or copper–nickel (CuNi) is an alloy of copper with nickel, usually along with small quantities of other metals added for strength, such as iron and manganese. The copper content typically varies from 60 to 90 percent. ( Monel is a nickel–copper alloy that contains a minimum of 52 percent nickel.) Despite its high copper content, cupronickel is silver in colour. Cupronickel is highly resistant to corrosion by salt water, and is therefore used for piping, heat exchangers and condensers in seawater systems, as well as for marine hardware. It is sometimes used for the propellers, propeller shafts, and hulls of high-quality boats. Other uses include military equipment and chemical industry, petrochemical industry, and electrical industries. In decorative use, a cupronickel alloy called nickel silver is common, although it contains additional zinc but no silver. Another common 20th-century use of cupronickel was silver-coloured coins. For this use, the typical alloy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nickel
Nickel is a chemical element; it has symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge. Nickel is a hard and ductile transition metal. Pure nickel is chemically reactive, but large pieces are slow to react with air under standard conditions because a passivation layer of nickel oxide forms on the surface that prevents further corrosion. Even so, pure native nickel is found in Earth's crust only in tiny amounts, usually in ultramafic rocks, and in the interiors of larger nickel–iron meteorites that were not exposed to oxygen when outside Earth's atmosphere. Meteoric nickel is found in combination with iron, a reflection of the origin of those elements as major end products of supernova nucleosynthesis. An iron–nickel mixture is thought to compose Earth's outer and inner cores. Use of nickel (as natural meteoric nickel–iron alloy) has been traced as far back as 3500 BCE. Nickel was first isolated and classifie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copper-nickel
Cupronickel or copper–nickel (CuNi) is an alloy of copper with nickel, usually along with small quantities of other metals added for strength, such as iron and manganese. The copper content typically varies from 60 to 90 percent. (Monel is a nickel–copper alloy that contains a minimum of 52 percent nickel.) Despite its high copper content, cupronickel is silver in colour. Cupronickel is highly resistant to corrosion by salt water, and is therefore used for piping, heat exchangers and condensers in seawater systems, as well as for marine hardware. It is sometimes used for the propellers, propeller shafts, and hulls of high-quality boats. Other uses include military equipment and chemical industry, petrochemical industry, and electrical industries. In decorative use, a cupronickel alloy called nickel silver is common, although it contains additional zinc but no silver. Another common 20th-century use of cupronickel was silver-coloured coins. For this use, the typical alloy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steel
Steel is an alloy of iron and carbon that demonstrates improved mechanical properties compared to the pure form of iron. Due to steel's high Young's modulus, elastic modulus, Yield (engineering), yield strength, Fracture, fracture strength and low raw material cost, steel is one of the most commonly manufactured materials in the world. Steel is used in structures (as concrete Rebar, reinforcing rods), in Bridge, bridges, infrastructure, Tool, tools, Ship, ships, Train, trains, Car, cars, Bicycle, bicycles, Machine, machines, Home appliance, electrical appliances, furniture, and Weapon, weapons. Iron is always the main element in steel, but other elements are used to produce various grades of steel demonstrating altered material, mechanical, and microstructural properties. Stainless steels, for example, typically contain 18% chromium and exhibit improved corrosion and Redox, oxidation resistance versus its carbon steel counterpart. Under atmospheric pressures, steels generally ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copper
Copper is a chemical element; it has symbol Cu (from Latin ) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orange color. Copper is used as a conductor of heat and electricity, as a building material, and as a constituent of various metal alloys, such as sterling silver used in jewelry, cupronickel used to make marine hardware and coins, and constantan used in strain gauges and thermocouples for temperature measurement. Copper is one of the few metals that can occur in nature in a directly usable, unalloyed metallic form. This means that copper is a native metal. This led to very early human use in several regions, from . Thousands of years later, it was the first metal to be smelted from sulfide ores, ; the first metal to be cast into a shape in a mold, ; and the first metal to be purposely alloyed with another metal, tin, to create bronze, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Qaboos Bin Said
Qaboos bin Said Al Said (, ; 18 November 1940 – 10 January 2020) was Sultan of Oman from 23 July 1970 until his death in 2020. A fifteenth-generation descendant of the founder of the Al Bu Said dynasty, he was the longest-serving leader in the Middle East and Arab world at the time of his death, having ruled for almost half a century. The only son of Said bin Taimur, List of rulers of Oman, Sultan of Muscat and Oman, Qaboos was educated in Suffolk, England. After graduating from the Royal Military Academy Sandhurst, he served briefly in the British Army. He returned to Oman in 1966 and was the subject of considerable restrictions from his father. In 1970, Qaboos ascended to the Omani throne after overthrowing his father in a 1970 Omani coup d'état, coup d'état, with British support. The country was subsequently renamed the Sultanate of Oman. As sultan, Qaboos implemented a policy of modernization and ended Oman's international isolation. His reign saw a rise in the country ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Emblem Of Oman
The national emblem of Oman () is Khanjar Wa Sayfain (Khanjar (dagger) and two swords), an insignia consisting of a ''Khanjar'' inside its Scabbard, sheath that is superimposed upon two crossed swords. Adopted in the 18th century as the badge of the House of Al Said, Omani royal family, it subsequently became the national emblem of the Sultanate of Oman. The emblem is featured at the Canton (flag), canton on the Flag of Oman. History The national emblem was first designed in the mid-18th century, when it was adopted as the royal crest of the House of Al Said, Al Said dynasty. Its usage was expanded when it subsequently became the national emblem of Oman, the sultanate. This occurred during the reign of either Faisal bin Turki, Sultan of Muscat and Oman, Faisal bin Turki (1888–1913) or Taimur bin Feisal (1913–1932). The emblem was later incorporated onto the canton of the country's flag of Oman, national flag in 1970. Moreover, in order to distinguish "directly royal entiti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bronze
Bronze is an alloy consisting primarily of copper, commonly with about 12–12.5% tin and often with the addition of other metals (including aluminium, manganese, nickel, or zinc) and sometimes non-metals (such as phosphorus) or metalloids (such as arsenic or silicon). These additions produce a range of alloys some of which are harder than copper alone or have other useful properties, such as strength, ductility, or machinability. The archaeological period during which bronze was the hardest metal in widespread use is known as the Bronze Age. The beginning of the Bronze Age in western Eurasia is conventionally dated to the mid-4th millennium BCE (~3500 BCE), and to the early 2nd millennium BCE in China; elsewhere it gradually spread across regions. The Bronze Age was followed by the Iron Age, which started about 1300 BCE and reaching most of Eurasia by about 500 BCE, although bronze continued to be much more widely used than it is in modern times. Because historica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indian Anna
An anna (or ānna) was a currency unit formerly used in British India, equal to of a rupee. It was subdivided into four pices or twelve pies (thus there were 192 pies in a rupee). When the rupee was decimalised and subdivided into 100 (new) paise, one anna was therefore equivalent to paise. The anna was demonetised as a currency unit when India decimalised its currency in 1957, followed by Pakistan in 1961. It was replaced by the 5-paise coin, which was itself discontinued in 1994 and demonetised in 2011. The term anna is frequently used to express a fraction of . ''Anna'' is derived from the Sanskrit , meaning "food". There was a coin of one anna, and also half-anna coins of copper and two-anna pieces of silver. With the rupee having been valued to 1s 6d and weighing 180 grains as a 916.66 fine silver coin, the anna was equivalent to d (one penny and half a farthing). Hence the 2 anna silver coins were of low weight (22.5 grains = 1.46 g). Anna-denominated postage ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
