How gemstones are formed? Minerals form under various conditions in the earth. Most gemstones form in the Earth’s crust; the top layer of the Earth‚ with a depth of 3 to 25 miles. Only two gemstone varieties - diamond and peridot - form in the Earth’s mantle‚ which represents 80% of the Earth’s volume. The mantle consists mostly of molten rock called magma with a solid upper layer. A few gemstones form in the mantle‚ but all gems are mined in the crust. The crust is made up of three kinds of rock
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of Chlorine and Iodine in Water I. Introduction The purpose of this laboratory was to determine the amount of chlorine and iodine in a sample of water by titration using a starch indicator and to standardize a sodium thiosulfate solution. Chlorine is added to municipal water supplies to purify it enough to become safe to drink. Iodine is also added to water when people camp or go hiking in the back country where they cannot bring purified water along. Chlorine and iodine are added to kill
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Chapter 3 Financial Statements‚ Cash Flow‚ and Taxes Learning Objectives After reading this chapter‚ students should be able to: ◆ Briefly explain the history of accounting and financial statements‚ and how financial statements are used. ◆ List the types of information found in a corporation’s annual report. ◆ Explain what a balance sheet is‚ the information it provides‚ and how assets and claims on assets are arranged on a balance sheet. ◆ Explain what an income statement
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peroxide reacts with iodide ions producing iodine‚ when in an aqueous acid solution. H2O2 (aq) + 2I- (aq) + 2H3O+(aq) I2 (aq) + 2H2O(l) To detect iodine you can look at the color shown by the addition of starch solution. Iodine also reacts with sodium thiosulphate solution‚ which acts as a delaying agent. Adding sodium thiosulphate to the reaction mixture will allow the iodine produced initially to react with the thiosulphate ions‚ which reduce the iodine to iodide ions‚ leaving the starch unchanged
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tested using 3 to 10 drops of the additive in order to observe a change. With any experiment you compose a hypothesis; where you make an educated guess. The hypothesis will primarily be‚ which base chemical will produce the greatest change based on the additive. Experiment 6.1 (Starch) when adding the three drops of Iodine to each tube observe the color change. When performing this test the chemical with the larger amount of iodine will be identified. The larger the amount of iodine in the chemical
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and the corrective action taken against the restraining forces in order to make the change sustainable. • According to Kurt Lewin’s three step model‚ the change process of MBSL had been analysed through its three steps which are unfreeze‚ change and refreeze. Unfreeze Changing the status quo comes under this step. What was mainly done under this step was changing the mind-set of the employees of all three companies and bringing them in to a one mind set where they can implement the change initiatives
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types of radiation and radioactive emissions in the world wide that can be used in medicine. Iodine-131 has a big effect and usage for medicine where it has 53 protons‚ 53 electrons and 78 neutrons. Iodine-131 has varied uses in medicine where it is utilized as a part of atomic pharmaceutical restoratively and can likewise be seen with symptomatic scanners in the event that it has been utilized remedially. Iodine-131 they can be promptly followed even in moment amounts with such discovery gadgets as gamma-beam
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ECON112 Macroeconomics Problem Set 3 *Solution* Fall 2010 (Instructor: Li‚ Yao; TA: Fok Pik Lin‚ Astor) -----------------------------------------------------------------------------------------------------------------------------------Posted: Monday‚ November 1‚ 2010 Due: 5:30 PM Monday‚ November 8‚ 2010 40 marks total Part I: True/False/Uncertain Please justify your answer with a short argument for each question and draw a diagram if necessary. (15 marks‚ 3 marks each: 1 mark for correct judgment
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“A Step Away From Them” is a poem written by Frank O’Hara’s observation of the city during his lunch hour. As he walks through the city‚ his observations become more of introspections about life and how time is a constant reminder of our time on Earth. O’Hara distances himself from those whom he had lost‚ but only to realize his own personalize awareness of his life and the changes around him. The first stanza of the poem creates certain attentiveness to details of one’s surrounding‚ in such that
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5 tons 1800 Barley 2.2 tons 2200 Constraints: Thus mathematical model is: Maximize: Subject to: Solving the problem using solver of MS Excel we get the solution as follows: Variable Solution 547.21 544.90 422.71 311.34 373.84 65.52 65.52 0.00 Variable Max. Profit Solution 0.00 0.00 586.66 376.95 35.33 0.53 0.53 315862.07 Crop Plan Parcel Cultivation Area (Acre) Wheat Alfalfa Barley Total Area Southeast 547.21 65.52 586.66 1199.39 North 544
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