Chapter 4 In Howard Zinn’s book‚ Passionate Declaration: Essays on War and Justice‚ I read chapter four titled “The Use and Abuse of History.” Zinn in this chapter discusses how history is used and abused. Many in society today only tell “impartial history‚” meaning we leave parts of history out to make a certain group or event stick out. History in the United States of America is swayed always to make us look like the good ones. We are a biased country and the government will do anything to censor
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PHOTOSYNTHESIS LAB Alyssa Wright VARIABLE: LIGHT INTENSITY AIM: to investigate the effect of light intensity (lux) on the amount of oxygen produced (number of bubbles) HYPOTHESIS: I predict that the rate of oxygen produced increases‚ as the light intensity increases‚ but only to a point. I predict this will happen because the plant will have enough carbon dioxide and water to keep up with the amount of light that there is. When there is less light intensity‚ photosynthesis will happen
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Constituent of “Panacetin” Recrystallization& Melting-Point Measurement Organic Chemistry Lab Introduction: Panacetin purportedly includes sucrose‚ aspirin‚ and acetaminophen. However‚ the accuracy of Panacetin’s contents has been called into question by the Association for Safe Pharmaceuticals. Therefore‚ the lab must discover the accuracy of the ingredients listed on Panacetin’s label. The unknown in this experiment is presumed to be something
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Post-Lab Questions 1. Using the information provided in the Introduction and your observations from Part 1‚ hypothesize as to the type of electrolyte the following solutions would be. Justify the hypothesis from a chemical standpoint. a. Aqueous Sodium Hydroxide—NaOH (aq) is a very strong base‚ which will completely disassociate into Na+ and OH- ions‚ which would make it a very strong electrolyte. Chemical reaction of the disassociation of Sodium Hydroxide: NaOH (aq)Na+ (aq)+ OH-(aq)
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(correct answer‚ your response) • e • f • g • h 3. Points earned: 1 out of 1 View exercise 3. ver un partido de fútbol • a • b (correct answer‚ your response) • c • d • e • f • g • h 4. Points earned: 1 out of 1 View exercise 4. salchichas • a • b • c • d • e • f • g • h (correct answer‚ your response) 5. Points earned: 1 out of 1 View exercise 5. ir en avión • a • b • c • d • e • f (correct answer
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penny in the four positions shown in the diagram. 2. Mass and record the mass of the penny. 3. Using a graduated cylinder‚ measure 60.0 mL of 3.0 M HCl and pour it into your 100mL beaker. 4. Place the penny in the HCl solution etch side up and record observations for 3-5 minutes. 5. Place the beaker in your lab drawer. 6. Answer question #1 for tomorrow. Read and prepare a data table for Day II. DAY II 1. Using your forceps‚ carefully remove the fragile copper jacket that is left from the penny.
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Practical 4 Title: To study the magnification of a real image by a convex lens. Objective: To determine the focal length of a convex lens. Apparatus and Materials: 1. Light box 2. Convex lens 3. Plasticine 4. Meter rule 5. Screen 6. Short transparent ruler Setup: 1. Set up the apparatus as shown in Figure 4-1. Figure 4-1 Theory: From the lens equation: Where: p = object distance q = image distance Linear magnification‚ Procedure: 1. The apparatus
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(dialysis tubing). The experiment will show how molecules in solution move from areas of higher concentration to areas of lower concentration in the attempt to reach homeostasis in different circumstances. Introduction: The main purpose of this lab was to observe diffusion and osmosis. This is demonstrated using dialysis tubing and a combination of monosaccharaides‚ disaccharides‚ water (H20)‚ and sodium chlorine
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Irish harp featured on the Coat of Arms? The harp represents Irelands place in the UK. The shield is broke into quarters and the guardant lions represent the filling of the first and fourth quarters. The harp is also on the Ireland coat of Arms. 4. What does the unicorn represent? Why would the rulers of England choose a unicorn to support their shield? Because according to legend a free unicorn was considered a very dangerous beast so that’s why the unicorn was chained. 5. Why does the unicorn
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