DISCOVERY OF FIRE The largest technological breakthrough in prehistory was the discovery of fire. The discovery of the technology to make and sustain fire. The discovery of fire‚ or‚ more precisely‚ the controlled use of fire was‚ of necessity‚ one of the earliest of human discoveries. Fire ’s purposes are multiple‚ some of which are to add light and heat‚ to cook plants and animals‚ to clear forests for planting‚ to heat-treat stone for making stone tools‚ to burn clay for ceramic objects. Until
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NAME: PRANAY KHAITAN ROLL NO: 31 SEMESTER: 5TH COURSE: BACHELOR OF BUSINESS ADMIISTRATION (HONS.) SUPERVISOR: SOUMOJIT ADHYA TOPIC: CEMENT INDUSTRY DATE: DECEMBER‚ 2012 Dissertation submitted in partial fulfillment of The requirements of the Graduate Degree in BACHELOR OF BUSINESS ADMINISTRATION (HONOURS) J.D. BIRLA INSTITUTE At the JADAVPUR UNIVERSITY IN KOLKATA 1 Date: 6th December‚ 2012 To‚ The Controller of Examination‚ Jadavpur University‚ Kolkata. Respected sir‚ This research work
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water is any water containing an appreciable quantity of dissolved minerals. (2) Some of the minerals come from chalk‚ limestone or marble‚ which the water may have flowed over or through. (4) Hard water contains calcium or magnesium ions. Limestone‚ marble or chalks are insoluble in pure water however they will dissolve slowly in acidic rain. If your water has emerged through limestone or chalk (calcium carbonate) it will be hard. (1) Soft water is gratification water in which the only cation (positively
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and maintenance. Major Advantages of Jaw Crusher 1. Effectively solves the problem of high operation rate and little maintenance time caused by low output of limestone crusher. 2. Can complete the crushing work of large-sized limestone. 3. The blending of the two materials is even and the mixing quantity of the desulfurized limestone is greatly increased. 4. The electricity needed is reduced. 5. The granularity of the wastes is small. 6. Effectively improves the labor strength and the working
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like sulphur dioxide (SO2)‚ acid gases‚ and air toxics‚ from the flue gas (which is the smoke from the fire of a boiler which is made up of mainly carbon dioxide‚ carbon monoxide‚ and nitrogen). The sorbent that they normally use is limestone (CaCO3). When the limestone is crushed into a powder‚ they then mixed it with water(H2O) and spray it into the gases from burning coal. This solution then captures the toxic sulphur gases (SO2) and pulls them out and all that is left is a dry powder. This is
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The more than 100 pyramids that punctuate the west bank of the Nile have intrigued mankind for millennia. Numerous articles and books have discussed the pyramids of Egypt and the wondrous tombs‚ sculpture‚ jewelry‚ and artwork they secreted. However‚ pyramids are found in various locations in the world beyond Egyptmost notably in South America‚ Mesoamerica‚ Mesopotamia‚ India‚ and Cambodia. Is it possible that the ancient civilizations of Central America and South America‚ as an example‚ somehow
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was struck by a piece by the title of Fragment of a Painted Assyrian Relief. This piece‚ made by the Akkadian culture during the Mesopotamia Era‚ is approximately 10 3/8 x 5. 1 ¾ inch in size. This fine‚ yet very ancient‚ work is crafted out of limestone. Fine‚ durable‚ brown stone and red pigment‚ it is especially found in Northern Iraq. Having a short written record‚ this relief sculpture once formed part of a much larger composition‚ and it depicts the head of an Assyrian sovereign‚ probably Sargon
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LANDSCAPES AND LANDFORMS Purnululu National Park Puerto Princesa Subterranean River National Park Table of Contents Landscape and Landforms: Purnululu National Park 1 Formation of Landscape and Landforms 2 Indigenous Values 3 The Arts 4 Tourism 5 Landscape and Landforms: Puerto Princesa Subterranean River National Park 1 Formation of Landscape and Landforms 2 Indigenous Values 3 The Arts 4 Tourism 5 TOURISM The park‚ some accommodation and camping facilities and the underground river are
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Summary Page for: CHAPTER 5 ART OF ANCIENT GREECE Context: Cultural Belief System (religion) / History / Social / Political / Economic / Geographical Greek art influenced Western civilization to present / city states=democracy first evolved-also abstract reasoning‚ inquiry‚ philosophy‚ drama‚ poetry‚ & history / rugged mountainous terrain / Greeks felt themselves superior & called all other people "barbarians"/ After Persian army was repulsed Athenians established a democratic government headed
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The Copper (II) Sulfide (CuS) is then heated at 1100oC‚ with crushed limestone and sand‚ and is converted to Copper (I) Sulfide (Cu2S). The Copper (I) Sulfide is then roasted in air and some is oxidised to Cu2O. These two then react to form Copper metal‚ Both reactions described below – 2Cu2S(s) + 3O2(g) → 2Cu2O + 2SO2
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