Science February 6 2009 - February 19 2009 Conductor Investigation Calvin Chang 8.2 Stage 1: Planning the Experiment Introduction ! By “electric current”‚ I mean by the rate at which electric charges moves through a circuit‚ the electric charges can either be ions or electrons. They are measured in ammeters and the unit that is measured in is ampere which is the number of charges that passes through per second. There are many factors which would affect the electric current‚ like the voltage of
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AN INVESTIGATION TO FIND THE EFFECT OF BILE SALTS OF ON THE DIGESTION OF LIPIDS I have investigated that if there is an effect of bile salts on the digestion of lipids in the milk. When lipids are broken down in to fatty acids and glycerol (see below)‚ the acid lowers the pH of the mixture. To help me determine and measure the digestion of lipids‚ a pH indicator phenolphthalein has been used to measure the pH of the mixtures. The pH indicator will change the colour from pink to either white (if
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Who normally conducts the preliminary investigation? What are some of the actions the first responders can take once they arrive at the scene of the crime? Since the preliminary investigation starts when the first emergency call is received‚ it is typically administered by the patrol officers who are first to respond to the scene. First responders can either preserve or contaminate the crime scene‚ which can possibly result in either the success or failure of the prosecution. Accordingly‚ the steps
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partially supported because glucose left the bag and is proven by the positive test on the surrounding water. Also the beaker turned orange because of osmosis which attests to glucose leaving the bag. Iodine Potassium Iodine and water entered the bag. This was proven by the color change in the starch test as the bag turned black also because of osmosis. The only thing that the hypothesis lacked was that starch did not move at all. The beaker stayed yellow before and after because the bag is not permeable
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Osmosis The purpose of this lab is to study how membranes of plant and animal cells react when exposed to different solutions. The first experiment involves purple onion skin and the second involves rat blood in various solutions. I needed to understand certain terms before preforming this lab to be able to efficiently explain what is happening to the cells. Diffusion is the tendency of a substance to move down its concentration gradient from a more concentrated to a less concentrated area.
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Question 1: How does Osmosis works It refers to the movement of water molecules from an area of high-level water concentration‚ that is‚ a dilute solution‚ to an area of low-level water concentration‚ that is‚ a strong solution through a semi-permeable membrane. (Passmyexams.co.uk‚ 2015) Actually‚ water moves in a bi-directional manner with the aim of leveling up the concentration. However‚ a high number of water molecules move from the fresh water towards the salty water. The outcome
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Franklin 1 Jonathan Franklin Allen Layne Criminal Investigations 18.OCT.2013 Investigations And The Principles A successful crime scene investigation depends deeply on the collection and analysis of various kinds of evidence. Forensic scientists rely on the classification of certain evidence and they have different ways of dealing with it. One major difference is biological and physical. Physical evidence refers to the collection of anything at the crime scene that comes
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Aim. The aim of this investigation is to find out how Slaters react to an increase or decrease of the temperature in its surroundings. Hypothesis The speed of the Slaters will increase when the temperature of its environment is increased or decreased from its preferred range‚ so it ensures that they spend less time in unfavorable conditions to avoid desiccation. Method 1. This experiment is done using a water bath to change and control the temperature being trialed. The water bath will have
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Criminal Investigation Research Paper Crime Scene Investigator Crime Scene Investigator POSITION A crime scene investigator is responsible for multipart crime scene investigations‚ evaluation of the crime scene‚ various types of equipment along with developing‚ securing‚ and packaging physical evidence for scientific evaluation and comparison (U.S. Department‚ 2007). Detailed reports on the observations and activities at the scene next to testimonies in court regarding the findings and
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Unit5: Midterm Essay CJ21-Criminal Investigation Professor Yocum September 28th‚ 2010 Throughout the years the type of crimes and amount of crimes committed has changed significantly and has played a major role in the American society. What is crime? As defined by Frank Schmalleger (2007) “crime is a conduct in violation of the criminal laws of a state‚ federal government or a local jurisdiction where there is no legally acceptable justification or excuse” (p.7). Criminal investigators have
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