Science one world essay – Acid Rain Acid rain has been an important global issue for centuries. Although most acid rain is caused by human activities‚ some acid rain occurs naturally. An example of natural acid rain is erupting volcanos‚ they give off smoke containing water vapor‚ carbon dioxide‚ sulphur dioxide and nitrogen compounds. The sulphur dioxide and nitrogen compounds cause small amounts of acid rain near the volcano. Pure water is not an acid‚ but even clean rainwater is slightly acidic
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Lab 4 – The Cell Answer Key Procedure 4.3 Draw a picture of a single Elodea cell and label all visible structures. See the diagram in your lab manual. Without staining‚ the only structures that should have been clearly visible should have been the cell walls and the green chloroplasts. Is this cell prokaryotic or eukaryotic? ______Eukaryotic_______________________ What evidence do you have to support this claim? The presence of organelles (chloroplasts) and its large size.
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of a balance scorecard in achieving strategic objectives in organisation. Introduction: In current upsurge in economic condition globally brought on by competition and uncertainty‚ all organisations are impacted with need for changes to remain viable in performance of duties. This trend have prompt companies in adopting suitable approach which are unique to its operation and thus being effective in achieving goals objectives and prospect for development. The development of the balance scorecard
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Acid rain is a rain or any other form of precipitation that is unusually acidic‚ meaning that it possesses elevated levels of hydrogen ions (low pH). It can have harmful effects on plants‚ aquatic animals and infrastructure. Acid rain is caused by emissions of sulfur dioxide and nitrogen oxide‚ which react with the water molecules in the atmosphere to produce acids. Governments have made efforts since the 1970s to reduce the release of sulfur dioxide into the atmosphere with positive results. Nitrogen
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Memic_________________ Directions: Complete the questions below by referring to the corresponding information or websites located above each question set (A-C). Answer the questions electronically in RED text or hand write the answers‚ scan the document‚ and upload it in this assignment box. A. Watch this 8 minute video clip about demand and answer the questions below: http://www.youtube.com/watch?v=lmr4-ocHjLA 1. Why is calculating elasticity important for businesses? - companies use it just how elastic
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each other. Your answer should be substantiated with relevant examples. (10 Marks) 2. Explain any two types of errors that are disclosed by trial balance with examples and rectification entry. Note - Avoid giving examples given in the self learning material. (10 marks) Nov 2010 3. Let us assume you have been recently appointed as Management Accountant of a small but upcoming firm. Your immediate supervisor has asked you to prepare certain financial ratios from the balance sheet of one of their
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CHAPTER 3 BALANCE OF PAYMENTS SUGGESTED ANSWERS AND SOLUTIONS TO END-OF-CHAPTER QUESTIONS AND PROBLEMS QUESTIONS 1. Define the balance of payments. Answer: The balance of payments (BOP) can be de fined as the statistical record of a country’s international transactions over a certain period of time presented in the form of double-entry bookkeeping. 2. Why would it be useful to examine a country’s balance of payments data? It Answer: would be useful to examine a country’s BOP
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FORM 4G ELECTROLYSIS WORKSHEET TERM 3 2010-2011 1.Figure 1 below is a diagram of the apparatus used in the electrolysis of fused sodium bromide. Figure 1 a)Write the formulae for the ions present in the fused sodium bromide. b)Write an ionic equation to represent the reaction taking place at the positive and negative electrodes. c)When the heat source was removed‚ the crucible cooled and the lamp went out. Explain why the lamp went out when the crucible cooled. d)At the end of the experiment
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Is there really such a thing as rain with acid in it? Yes‚ acid rain is a very real phenomenon worldwide‚ and it’s been documented since the 1800s‚ as the Industrial Revolution caused the burning of fossil fuels like coal‚ gas and oil. When these fuels or any other organic material like wood or paper are burned‚ they release compounds like sulfur dioxide (SO2) and nitrous oxides (NOx) into the air. Are SO2 and NOx the causes of acid rain? Indirectly‚ yes. When SO2 and NOx enter the atmosphere
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Common Aspects of Acid Prehydrolysis and Steam Explosion for Pretreating Wood Hans E. Grethlein Michigan Biotechnology Institute‚ PO Box 27609‚ Lansing‚ Michigan 48909‚ USA & Alvin O. Converse Thayer School of Engineering‚ Dartmouth College‚ Hanover‚ New Hampshire 03755‚ USA Abstract The initial rate of hydrolysis using cellulase from Trichoderma reesei for various wood samples is directly proportional to the surface area available to the enzyme. Both dilute acid hydrolysis in a continuous
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