Coal Mining Coal mining is taking coal out of the earth for use as fuel‚ and there are two types of it: surface and mountaintop mining and underground mining. Coal is one of the most important resources because of its ability to be a fuel. Surface mining is used when the coal is near the surface‚ and a process known as strip mining extracts it; this is literally tearing a strip out of the earth to expose the coal. This is a highly controversial method though because by taking so many strips
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Introduction: Copper has played a vital role in past civilizations and continues to do so today due to its many properties as a metal. Although advantageous in today’s economy and also in human bodies‚ high concentrations of copper can prove toxic to our health and even pollutant to the environment. By altering the element through a number of chemical reactions including redox‚ metathesis‚ decomposition‚ and single replacement reactions‚ the cycle will be complete once solid copper is recovered.
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According to kellyco metal detectors on http://www.ebay.com/gds/How-To-Tell-If-You-Found-a-Meteorite-/10000000007246691/g.html‚ meteorites often sell for $300 per gram or more‚ meaning a one pound meteorite can be worth a million dollars. Ronald Smith has wrote 24 books. Sarah McCarry has wrote 3 books. “The Space Rock” and “The Golden Lie” have similarities and differences. Such as point of view and conflict. One similarity between “The Space Rock” and “The Golden Lie” is the point of view
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A natural rock is a versatile component used for landscaping design. You may find several issues like water retention and drainage with the old rocks in the landscape. The best way to get rid of these issues is to remove the rocks from the yard. Landscaping rocks are generally used on the creek beds‚ borders of the yard or may be scattered throughout the yard. If the landscape is not extensive‚ you can remove it by your own with the help of your friends. Before starting the process
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Working with the 555 555 is used for producing a clock (square wave) at a desired frequency. It can be used in various ways like the astable mode‚ monostable mode etc. Here‚ we deal with the astable operation of 555. Astable mode ensures that the 555 is self-triggered & so‚ it acts as a multi-vibrator. Let us look into the working of 555 in astable mode: These are the connections needed to make the 555 chip run in the ‘astable’ mode. The pin numbers are given in circles. Note the
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Presence of Insecticides & Pesticides in Fruits & Vegetables SCHOOL : K .V N T P C CHEMISTRY PROJECT REPORT STUDY THE PRESENCE OF INSECTICIDES AND PESTICIDES IB FRUITS AND VEGETABLES Name : Class : Reg. No : Examiner Teacher-in charge. CERTIFICATE This is to certify that the project was done by …………………………… Reg. No ……………….. Is in partial fulfillment of Chemistry Practical Examinations
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The ball mill is a key equipment for grinding materials‚ widely used in powder-making production line such as cement‚ silicate sand‚ new-type building material‚ refractory material‚ fertilizer‚ ore dressing of ferrous metal and non-ferrous metal‚ glass ceramics‚ etc. Ball mill can grind various ores and materials with dry type or wet type. There are two kinds of ball mills‚ grate type and overfall type due to different ways of discharging material. Ball grinder mill Maintenance and Repair Cycle
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Title: Calculating the Atomic Mass of “Pennium” Purpose: The purpose of this lab is to calculate the atomic mass of “pennium” using pennies made before 1982 and pennies made 1982 or after. Hypothesis: The atomic mass of the pennium will be the average of the average masses of a pre-1982 penny and a post 1982 penny. Procedure: 1. Obtain a bag of pennies 2. Determine the total number of pennies in the bag. Record the value. 3. Sort the pennies by date into 2 piles. One pile should consist
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The introduction of XCF/KYF flotation machine: Models XCF and KYF are enforced aeration flotation machine. It has a smaller diameter of impeller‚ thus lower peripheral speed‚ saving 30-50% of power. Because and air distributor is equipped in the tank‚ air is evenly dispersed. The impeller acts as a centrifugal pump‚ so as to make the solid particles suspending. The tank is mode as u type‚ reducing sand settlement to the least .Due to reasonable design of the impeller structure and the impeller
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Sample Paper – 2012 Class – X Subject –Chemistry Chemical Equations and reactions Very Short Answer (1 marks each) Write the name and formula of compounds forms between a. Potassium and iodine ion .b.Sodium and sulphide ions . c. Aluminums and chloride ions 2. Why does milk sour when kept for a long time/ 3. What happen when hydrogen combine with oxygen in presence of electric current/ 4. Define electrolysis. 5. What is decomposition reaction? Give an
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