the starchy root in order to survive‚ until a terrible adversity struck in the 1800’s that resulted in a famine that effected millions. The cause and factors of the Irish potato famine have puzzled Biologists for many years. Biologists have known that it was a strain of phytoptharainfestants that destroyed Ireland’s potato crops as well as northern Europe’s during the 1800’s. Several determined
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a current of 5.00 A. The density of aluminum is 2.70 g/cm3. Assume each aluminum atom supplies one conduction electron per atom. Find the drift speed of the electrons in the wire. 12. A lightbulb has a resistance of 240 when operating with a potential difference of 120 V across it. What is the current in the lightbulb? 13. An electric heater carries a current of 13.5 A when operating at a voltage of 120 V. What is the resistance of the heater? 18. Aluminum and copper wires of equal length
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The 1845 Great Irish Potato Famine negatively affected Ireland and its people. Due to this famine‚ many factors resulted from it and changed the course of Irish history. Three of these factors are reduced population‚ decline of the Gaelic language‚ and increased harshness of the Irish landlords. The Great Potato Famine was caused by a type of fungus called potato blight‚ which caused the potatoes to become mushy and inedible (Trueman). The 1846 potato crop was a failure due to this fungus
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N09/4/PHYSI/SPM/ENG/TZ0/XX+ 88096504 Physics standard level PaPer 1 Monday 16 November 2009 (afternoon) 45 minutes INSTRUCTIONS TO CANDIDATES • Do not open this examination paper until instructed to do so. • Answer all the questions. • For each question‚ choose the answer you consider to be the best and indicate your choice on the answer sheet provided. 8809-6504 16 pages © International Baccalaureate Organization 2009 – 2 – 1. N09/4/PHYSI/SPM/ENG/TZ0/XX+ The
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Investigating the Osmosis Effect in Potato Cores Aim The aim of this experiment is to investigate the osmosis effect in potato cores while they are submerged in different concentrations of sucrose solution. Osmosis will take place while the potatoes are fully submerged in the sucrose solution. Apparatus æ Scalpel (1) æ Tile (1) æ Pr. Tweezers (1) æ 250ml Beakers (2) æ 100ml Water (Per Beaker) æ 100ml Sucrose Solution o 0.2M o 0.4M o 0.6M o 0.8M o 1.0M æ Measuring
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Water Scarcity & the Importance of Water Introduction: This report has been written to inform you of the world water crisis which is getting worse every second. It has also been written to inform you about the water scarcity and importance. Water Scarcity and importance: Clean‚ safe drinking water is not easy to find any longer. Today‚ nearly 1 billion people in the developing world don’t have access to it. Yet‚ we take it for granted‚ we waste it‚ and we even pay too much to drink it from little
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Task 3 P3 - The potential effects of discrimination There are lots of potential effects related to discrimination. It includes things like disempowerment‚ low self-esteem and self-identity and also marginalisation. I am now going to explain these effects and connect them with a case study. Disempowerment is when a person or group of people may be made to feel less powerful or confident. Some people may try to fight against the discrimination causing an argument but many people do not and they lose
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Objectives To study the quantitative relationship between the amount of reactants and products of a reaction ( that is how many moles of A react with a given mol of B). A known starting mass of magnesium and the measured collection of hydrogen gas will be used to determine the reaction stoichiometry and the valency of magnesium Introduction Stoichiometry is the study of the quantitative relationship between amounts of reactants and products of a reaction. Stoichiometry can be used to calculate the
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Melting pointe determination #01 Introduction: Objective To learn how to obtain an accurate melting point using a MELTING POINT APPARATUS‚ then use them to draw eutectic curve and determine the eutectic point. Melting point of a solid is the temperature at which the solid and its liquid form are in equilibrium‚ i.e.‚ molecules move back and forth between the two states at the same rate‚ so both phases remain present. If the temperature of a solid is measured carefully as the solid is heated
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Determination of an Equilibrium Constant Abstract: In this experiment‚ two reactions were run to determine the molar absorptivity and the equilibrium constant of FeSCN2+. The main principles used in this lab are equilibrium‚ LeChatlier’s Principle‚ Beer’s Law and Spectrocopy. The first reaction was run to completion using LeChatier’s Principle and the second reaction was run to equilibrium. A spectrophotometer was used to measure absorbances. Using a graph of absorbance versus concentration
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