La reine de Chypre (The Queen of Cyprus) is an 1841 grand opera in five acts composed by Fromental Halévy to a French-language libretto by Jules-Henri Vernoy de Saint-Georges.The libretto was praised by Richard Wagner, who called it "noble, feeling and even new and elevating", although he was critical of Halévy's lapses towards what he called "unsophisticated …
Attackers would build mines, either to gain access to the interior or to undermine and collapse the defensive walls. ... made by heating lime, bones, and charcoal. On contact with water, calcium phosphide releases phosphine, which ignites spontaneously. ... C.W.C. Oman paraphrasing an account by Alexios's daughter Anna Comnena (1083–1153 ...
Vietnam or Viet Nam (Vietnamese: Việt Nam, [vîət nāːm] ()), officially the Socialist Republic of Vietnam, is a country in Southeast Asia, at the eastern edge of mainland Southeast Asia, with an area of 311,699 square kilometres (120,348 sq mi) and population of 96 million, making it the world's fifteenth-most populous country.Vietnam borders China to the north, and Laos and …
Oman (OMN) Pakistan (PAK) Palau (PLW) Panama (PAN) Papua New Guinea (PNG) Paraguay (PRG) Peru (PRU) ... Surface Mines 1B1b Solid Fuel Transformation 1B1c 1B2 Oil and Natural Gas 1B2a Oil 1B2a1 Exploration 1B2a2 Production 1B2a3 ... Lime Production 2A3 Limestone and Dolomite Use 2A4 Soda Ash Production and Use 2A5
Having read about the Stone Age and Copper Age, it becomes important to know about the Bronze Age Civilization i.e. Indus Valley Civilization (IVC). This topic is important for both UPSC Prelims and Mains perspectives. We will try to give a slightly detailed understanding of IVC. Don't worry if you feel, there's so much data or facts to ...
Naqada culture (4000–3000 BC) The Naqada culture is an archaeological culture of Chalcolithic Predynastic Egypt (c. 4400–3000 BC), named for the town of Naqada, Qena Governorate.It is divided into three sub-periods: Naqada I, II and III. Naqada I. The Amratian culture lasted from about 4000 to 3500 BC.Black-topped ware continues to appear, but white cross-line ware – a …
Middle Muscovite period (1530–1630) In the 16th century, the key development was the introduction of the tented roof in brick architecture. Tent-like roof construction is thought to have originated in northern Russia, [citation needed] since it prevented snow from piling up on wooden buildings during long winters. In wooden churches (even modern ones), this type of roof has …
The majority of minerals are found commonly in masses which can with difficulty be recognized as aggregates of crystalline grains, and occur comparatively seldom as distinct crystals; but the diamond is almost always found in single crystals, which show no signs of previous attachment to any matrix; the stones were, until the discovery of the South African mines, almost entirely …
Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO 4 ·2H 2 O. It is widely mined and is used as a fertilizer and as the main constituent in many forms of plaster, blackboard or sidewalk chalk, and drywall. Alabaster, a fine-grained white or lightly tinted variety of gypsum, has been used for sculpture by many cultures …
You know what sea-water is composed of. In a thousand grammes are found 96½ per cent. of water, and about 2-2/3 per cent. of chloride of sodium; then, in a smaller quantity, chlorides of magnesium and of potassium, bromide of magnesium, sulphate of magnesia, sulphate and carbonate of lime.
Silver is a chemical element with the symbol Ag (from the Latin argentum, derived from the Proto-Indo-European h₂erǵ: "shiny" or "white") and atomic number 47. A soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. The metal is found in the Earth's crust in the pure, free elemental form ("native silver ...
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Asbestos (/ æ s ˈ b ɛ s t ɒ s, æ z-,-t ə s /) is a naturally occurring fibrous silicate mineral.There are six types, all of which are composed of long and thin fibrous crystals, each fibre being composed of many microscopic "fibrils" that can be released into the atmosphere by abrasion and other processes. Inhalation of asbestos fibres can lead to various dangerous lung conditions ...