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Osmosis Experiment - Background Knowledge: Osmosis definition: Diffusion of water molecules through a semi permeable membrane from a higher concentration to a lower concentration until the concentration on both sides is equal. Osmosis in animal cells: The cell membrane is the partially permeable membrane in animal cells. If the cells were placed in distilled water they gain water, swell and burst. This is known as haemolysis. Osmosis in plant cells: The cellulose cell wall of plant cells is fully permeable. Therefore it’s the cell membrane of a plant cell which acts as the semi-permeable membrane, deciding what gets into and out of the cell....   [tags: Science Experiment] 582 words
(1.7 pages)
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The Harcourt Essen Experiment - The Harcourt Essen Experiment The aim of this investigation is to: 1) find the rate equation for the reaction between hydrogen peroxide, potassium iodide and sulphuric acid by using the iodine stop clock method and plotting graphs of 1/time against concentration for each variable. Then to find the activation energy by carrying out the experiment at different temperatures using constant amounts of each reactant and then by plotting a graph of in 1/t against I/T, 3) to deduce as much information about the mechanism as possible from the rate equation....   [tags: Chemistry, Science, Experiment] 1470 words
(4.2 pages)
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Verbal Reaction Times Experiment - Verbal Reaction Times Experiment The research paper refers to tables that are NOT included with this paper. This report aimed to replicate Stroop's (1935) experiment. Using the repeated measures design and a sample of 20 students, differences in verbal reaction times on two tests were observed. The one-tailed hypothesis predicted that it would take longer to say words in the Cc, this is the conflicting condition where the colour of the word differs from the colour that the word describes....   [tags: Stroop 1935 experiment]
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2635 words
(7.5 pages)
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cDNA Experiment Results - ... The bacterial colonies that were appeared after an overnight incubation at 37ºC were placed in 5 ml Amp100 LB broth and incubated overnight at 37ºC. A purification of 1400 µl aliquot of plasmid DNA from each 5 ml Amp100 LB broth was made by using Qiaprep spin miniprep kit as directed which was followed by a restriction digest with Hind III and Xho I on each of the purified samples. The plasmids that have been successfully digested with the restriction enzyme were sequenced by the use of Big Dye Terminator Cycles Sequencing 3.1 (Applied Biosystems) in combination with an ABI 310 DNA sequencer....   [tags: cDNA Experiment Results ] 1285 words
(3.7 pages)
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The Experiment - The Experiment The Experiment was written based off the moral war between whether or no cloning is right. It involves three main people: Jude, Skyler and Tizzie. Jude is a newspaper reporter and has been dating Tizzie for quite awhile. Tizzie is a doctor who studies twins and the different types. Jude was doing a newspaper article and that was how he met Tizzie. He had to get information for the article and was told that Tizzie was the person to talk to when it came to twins. She happened to be a highly recognized doctor in that field....   [tags: essays research papers] 1098 words
(3.1 pages)
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The Forbidden Experiment by Roger Shattuck - The Forbidden Experiment by Roger Shattuck It is one of the oldest unanswered questions in all of science. Though slightly more grounded in empirical science than the likes of "Where did we come from?" or "Why are we here?" the impossible Nature/Nurture dichotomy has tormented truth-bound scientists for years. Recent advances in genetics have brought forward new possibilities for those who would study the pure effects of environmental variables on animals, but we are far from allowing ourselves to manipulate other human beings in such ways for the sake of collecting data....   [tags: Forbidden Experiment Roger Shattuck Essays]
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1421 words
(4.1 pages)
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The Ethics of the Stanford Prison Experiment - When put into the position of complete authority over others people will show their true colors. I think that most people would like to think that they would be fair, ethical superiors. I know I would, but learning about the Stanford Prison Experiment has made me question what would really happen if I was there. Would I be the submissive prisoner, the sadistic guard, or would I stay true to myself. As Phillip Zimbardo gave the guards their whistles and billy clubs they drastically changed without even realizing it....   [tags: Stanford Prison Experiment, psychology, criminal j] 923 words
(2.6 pages)
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Research Experiment to Determine the Speed of Sound - Abstract/Introduction: Sound is the sensation that our brain interprets when vibrations carried to our ears stimulate the auditory nerves. It is produced by the compression and rarefaction of matter. The speed of sound depends on the properties of the medium such as bulk modulus, density and the temperature though which it travels. It does not depend on the source of the sound. Sound travels faster in air which is less dense and in air with a higher temperature. Hence, more density and heat = faster speed of sound....   [tags: physics, Physics Experiment] 1972 words
(5.6 pages)
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Chemistry Report: Experiment on Rates of Reaction - Rates of Reaction CaCO3 + 2HCl → CaCl2 + H2O + CO2 In this report I will be suggesting my predictions on what the rates of reaction will be and what the actual rates of reaction are. I will do this by collecting data from experiments and I will show this by putting data into a table. The main aim of my experiment is to find the rate of reaction over time taken and the rate of reaction when the concentration of hydrochloric acid increases or decreases. I will try to make my experiment as accurate as I can....   [tags: chemistry experiment, lab report] 3714 words
(10.6 pages)
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Sodium Thiosulphate Reaction Time Experiment - Introduction: In the investigation I am going to see how long it takes for sodium thiosulphate to react with hydrochloric acid, the sodium thiosulphate will be diluted with water, I will do this by having 60 ml sodium thiosulphate and 40 ml water but each time I will change the amount of sodium thiosulphate and water but they will both add up to equal 100ml, I will know when the reaction has taken place because the beaker with the chemicals in will go cloudy, we will put the beaker on a piece of paper with a x on it....   [tags: chemistry, chemistry experiment] 912 words
(2.6 pages)
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An Experiment to Determine Whether People Are Influenced by Leading Questions - An Experiment to Determine Whether People Are Influenced by Leading Questions Abstract The purpose of the experiment was to determine whether people are influenced by leading questions. This experiment is a replication of an experiment conducted by Loftus and Palmer in 1974. In the experiment the independent variable was the verb used (contact, smash). The dependant variable was the speed estimated by the participants when recalling the picture of the crash from their memory. The results gave evidence that specific words could influence the retrieval of a memory....   [tags: Psychological Experiment]
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2361 words
(6.7 pages)
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AN EXPERIMENT TO FIND THE ACOUSTIC IMPEDANCE OF PARAFFIN AND WATER - ... A CRO was used to measure signals from the transmitter and transducer. A high accuracy set of scales was used to measure the mass of the liquids, and a pipette was used to measure the volume of the liquids as they were added to the scales. procedure The glass tube and CRO were set up as shown in fig 1. The tube was then filled with a small quantity of water, filling to tube up to around 8cm from the base. The source was made to oscillate, which triggered the sweep on the CRO. The source oscillated for short bursts which moved through the water, and reflected off the water-air boundary....   [tags: Experiment Analysis]
:: 1 Works Cited
1905 words
(5.4 pages)
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The Rebirth of Youth in "Dr. Heidgger's Experiment" - Life is short. Death is forever. Time is of the essence. When the performances of our lives upon earth have reached it final act, human nature forces us to reflect on the fragility of not only the human body, but also the fragility of the human psyche. We are all just visiting this life, just passersby seeking to find our way through the blizzard of existence. Literary works swoop readers to distant lands and drop them in life defining situations; Works of art that assault the eyes and force the mind to become one with the painting are just two of the many ways humans have attempted to stay connected to life after death....   [tags: Dr. Heidgger's Experiment, Nathaniel Hawthorne,]
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1017 words
(2.9 pages)
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Bad Blood: The Tuskegee Syphilis Experiment by James H. Jones - Bad Blood: The Tuskegee Syphilis Experiment by James H. Jones Introduction The book BAD BLOOD: THE TUSKEGEE SYPHILIS EXPERIMENT by James H. Jones was a very powerful compilation of years of astounding research, numerous interviews, and some very interesting positions on the ethical and moral issues associated with the study of human beings under the Public Health Service (PHS). "The Tuskegee study had nothing to do with treatment … it was a nontherapeutic experiment, aimed at compiling data on the effects of the spontaneous evolution of syphilis in black males" (Jones pg....   [tags: Medical Experiment] 1728 words
(4.9 pages)
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Word Experiment - Word Experiment The experiment started by making up between 1-6 word lists. To make the experiment easy to understand ill use 2 word lists. On one of the word lists I put a list of random words which are in different categories muddled up. For example: Rabbit and horse are both animals and shoes and trousers are both types of clothing. Now then you muddle those words up. You need about 24 words because there are 6 categories with four words in each, 6 x 4 =24....   [tags: Papers] 1312 words
(3.7 pages)
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Osmosis Experiment - Osmosis Experiment Planning Aim: The main subject that I will be planning to investigate is the effects of a concentrated sucrose solution on potato cells on the basis of the Osmosis theory. Background knowledge: The plant cell and its structure To understand osmosis in detail I will need to explain the plant cell (which is the cell included in the osmosis experiment) and its cell membrane. Below I have a diagram of a plant cell: [IMAGE] Osmosis is about the movement of particles from a higher concentrated solution to a lower concentrated solution to create an ethical balance via a partially or semi permeable cell membrane....   [tags: Papers] 1352 words
(3.9 pages)
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Caffeine Experiment - ... The proposal is that we run an independent practical experiment with the class and record the effects that the caffeine has on each individual’s energy levels and emotions based on their intake of caffeine. We will record the effects by conducting a stroop test and a reaction time test as well as a mood questionnaire that will survey their individual moods after drinking the caffeine. Results: Note: Data Above shows the averages based on the mood questionnaire completed by the students. Discussion: From the surveys that completed by the students, they were then collected; the averages were calculated and collated into a simple easy to read graph....   [tags: Research Analysis] 1107 words
(3.2 pages)
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Osmosis Experiment - Osmosis Experiment Planning Introduction Osmosis is the passage of water molecules from a weaker solution into a stronger solution, through a partially permeable membrane. In this case, the tiny holes in the membrane of the potatoes will allow the water molecules to pass through in and out of the solution and the potato, depending on the concentration gradient of the two substances. So in this case, when the water concentration is lower in the tissue, the water will go inside the tissue of the potato, and the potato will grow in length, and if there is very little difference in the two water concentrations, there shouldn't be such a big change in length....   [tags: Papers] 1643 words
(4.7 pages)
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Gravity Experiment - Gravity Experiment My physics coursework is an experiment with gravity. The experiment is done by creating a parachute with a plastic bag. The parachute has a given area and is usually square shaped. This means that the area is easily calculated. There are lengths of string attached to the chute which hold a ball of play dough at the bottom. [IMAGE] To do the experiment we have a choice of either keeping the mass of the play dough the same and keep changing the area of the chute, or we could keep the area of the chute the same and change the mass of the play dough each time....   [tags: Papers] 670 words
(1.9 pages)
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Vision Experiment - Vision Experiment Key factors: Brightness of the room will remain the same; letter sizes will change throughout the experiment. Glasses will not be worn. Method: 1.Read sheet at one metre away. Record result based upon how difficult your partner thought it was for you. 2.Read sheet at two metres away. Record result based upon how difficult your partner thought it was for you. 3.Read sheet at three metres away....   [tags: Papers] 382 words
(1.1 pages)
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Lab Experiment - Lab Experiment 12 participants locked in a lab for 13 weeks, being set nerve-testing challenges, having their food supply limited, not being aloud to sleep, leading to physical violence verbal abuse and sex. If this was conducted under the front of a psychology experiment uproar would occur concerning its ethical issues, however under the front of a television game show these ethical and moral issues don't arise. Surely it is just as psychologically damaging to its participants as a lab experiment even with its glamorized appearance and hefty prize money....   [tags: Papers] 884 words
(2.5 pages)
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Psychology Experiment - n hypothesis of the experiment is that the group containing four members will perform better than the group containing two members. This is the foundation from which we have conducted our experiment. The research our experiment was founded on was that carried out by Taylor and Faust (1952). They carried out an experiment on 105 student’s, which was designed in the method of the game ‘twenty questions’. The students were split into teams of one member, two members and four members. They were then told that the experimenter would keep an object in mind whether it is animal vegetable or mineral was also stated, and they were then allowed 20 questions and guesses to reveal the identity of the object....   [tags: essays research papers] 684 words
(2 pages)
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Chemistry Experiment - Chemistry Experiment How does the change in the electric current used in the electrolysis of copper sulphate solution affect the mass of copper deposited on the copper electrodes. Aim --- The aim of this experiment is to find out whether the mass of copper deposited on copper electrodes during the electrolysis of copper sulphate solution changes when the current used to electrolyse the solution is increased. Hypothesis ---------- I predict that if the current used to electrolyse the copper sulphate solution is increased, then the mass of copper deposited on the copper cathode will increase....   [tags: Papers] 2189 words
(6.3 pages)
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Osmosis Experiment - Osmosis Experiment Aim: The aim of this experiment is to show how osmosis works in a plant cell. Plan: Method The ways we will do this experiment is firstly by getting a beaker and put a 100ml of water in it, then get a visking tube and put it in the beaker, so we don't block the holes with natural grease on our hands. After, we will get another beaker and pour some 1% sugar solution in it. When we have done this, we get one end of the visking tube and 'ruffle' it, then we get some string and one person will tie the end of the tube, while the other person hold it....   [tags: Papers] 803 words
(2.3 pages)
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Chemistry Experiment - Chemistry Experiment An investigation to find out how the rate of the reaction of hydrochloric acid and sodium thiosulphate solution is affected by the concentration of the sodium thiosulphate. I am going to investigate the effect of varying the concentration of sodium thiosulphate solution in a reaction with hydrochloric acid. The theory behind this experiment is that 'increasing the concentration can increase the rate of the reaction by increasing the rate of molecular collisions.' [IMAGE]Sodium Thiosulphate + hydrogen acid sodium chloride + sulphur +sulphur dioxide + water Or [IMAGE]Na SO (aq) +2HCL (aq) 2NaCL (aq) + SO (I) + SO (g) Plan ==== Prediction ---------- I predict that the greater the concentration of sodium thiosulphate solution the faster the chemical reaction will take place....   [tags: Papers] 957 words
(2.7 pages)
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Biology Experiment - Biology Experiment Hypothesis I predict that the potatoes in the solution with high sugar concentration will increase in mass the most, the potatoes in the water with no sugar will lose the most mass. Osmosis is the movement of water from a high concentration to a low concentration across a particularly permeable membrane. The water can move between the potato and the solution but the sugar can’t because the molecules are too big to pass through the membrane. The water will move between the solution and the potato....   [tags: Papers] 1475 words
(4.2 pages)
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Mentos Experiment - MENTOS + SODA = . Problem: Which brand of soda tested spews the most liquid when three Mentos are doped into a 2-liter of each brand. We know that the reaction between Mentos and soda is an explosion, but what we are trying to figure out is which brand causes the biggest reaction. Hypothesis: If three Mentos are dropped into a 2-liter of Diet Coke, Diet 7-Up, and Dr Thunder, then the Diet Coke will have the largest reaction to the Mentos. Materials: 1 pkg. Mint Mentos candies 2-liter Diet Coke 2-liter Diet 7-Up 2-liter Dr....   [tags: Chemistry] 604 words
(1.7 pages)
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Osmosis Experiment - Osmosis Experiment Experiment to investigate how equal masses of potato are effected in different concentrations of 1molar sucrose soloution. Aim: To investigate if osmosis occurs in potatoes, and if so, how it affects potatos of equal mass (2.5g) in different molar solutions of sucrose and water. Apparatus: -Cutting tile which will be used to cut the potato on. -Knife which will be used to peel the potato with and to cut to correct mass....   [tags: Papers] 2503 words
(7.2 pages)
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The Milgram Experiment - The Milgram Experiment Stanley Milgram, an American social psychologist, carried out an experiment in the United States in 1961, asking the question: "How far will a human being go if an anonymous authority orders him to torture or even to kill a fellow human?" I was approached in the street for no particular reason and I became one of those unlucky few who became part of the experiment. I had nothing in particular planned for the day just the usual browsing around the shops and maybe buy a few t-shirts....   [tags: Papers] 716 words
(2 pages)
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Electromagnetism Experiment - Electromagnetism Experiment Introduction: ============= I start the introduction with a question: Will increasing current in an electromagnet increase the power of the electromagnet. The electromagnet we will be making is a very primitive one compared to that of the complexity of modern electromagnets found in machinery, but the way it works is almost identical. Electromagnetic technology is extremely complex and because it is an electromagnet, the higher the current, the stronger it becomes, and with this an electromagnet can become incomprehensively strong....   [tags: Papers] 1064 words
(3 pages)
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Hearing Experiment - Hearing Experiment The aim of this experiment will be to investigate whether the gender of a person affects their ability to hear in the age group of between 16 and 17 years. I predict that there will be no difference in the results collected from each gender. Apparatus * 100 Meter Measuring Tape * A whistle * A blindfold * 3 Males aged 16 – 17 * 3 Females aged 16 – 17 Method 1. Place the measuring tape in a straight line along a flat playing field, then ask the first subject to stand on the measuring tape at the 10 meter mark, then blindfold the subject so they cannot see when you blow the whistle....   [tags: Papers] 418 words
(1.2 pages)
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Enzymes Experiment - Enzymes Experiment Introduction Enzymes are biological catalysts that promote some of the thousands of chemical reactions that occur in living cells. They are large molecules that have a unique three-dimensional structure that allows it to react with a specific substrate. It is hypothesized that pH levels out of the normal range found in cells would denature the enzyme, slowing the enzyme's reaction rates. Hydrogen Peroxide (H2O2) is a poisonous chemical that is continually being formed as a byproduct of reactions in peroxisomes of living cells....   [tags: Papers] 1118 words
(3.2 pages)
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Experiment on Diffusion - Experiment on Diffusion Aim: to determine diffusion (in ordinary tap water). Apparatus: beaker, potassium permanganate and tin foil. Method: I filled the beaker (half) with ordinary tap water and I released the potassium permanganate into it from the thin foil. Results: within a matter of a few seconds to one and half minutes, the whole water turned purple beginning from the area where the potassium permanganate was dropped. Conclusion: this experiment showed the movement of potassium permanganate molecule all around the beaker of ordinary tap water thereby, concluding the fact that molecules would move from a place of higher concentration to a place of lower concentration (diffusion) passively....   [tags: Papers] 6178 words
(17.7 pages)
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Osmosis Experiment - Osmosis Experiment Aim Ÿ To investigate the effect of osmosis on potato chips in different concentrations of sugar solution. Ÿ To find the concentration of sugar in baking and sweet potato Introduction Osmosis is the diffusion of water molecules from a high to low concentration across a semi-permeable membrane. The process of osmosis is important in plants and takes place in: Ÿ Root hair cells, where water is absorbed from the soil. Ÿ Plants cells. If a plant cell is surrounded by water or a solution more dilute than the content of the cytoplasm and cell sap, water will pass into the vacuole by osmosis....   [tags: Papers] 674 words
(1.9 pages)
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Beetroot Experiment - Beetroot Experiment We are trying to find how the temperature affects the rate at which the anthocyanin pigment leaves the cells, and at what point does the call wall melt. Beetroot Experiment =================== Task ---- We are trying to find how the temperature affects the rate at which the anthocyanin pigment leaves the cells, and at what point does the call wall melt. Please note the two results highlighted found in "test 4" have not been included into my results, as they are obviously anomalous....   [tags: Beetroots Anthocyanin Pigment Essays] 1099 words
(3.1 pages)
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Das Experiment - "Das Experiment" is based on a 1970's experiment called "The Stanford County Prison" experiment. A study done to see if the social structure of a prison affects the behavior of prisoners and guards and the perception of their roles. As the scientists trusted and soon learned to fear, the volunteers immediately fell into their, anticipated, roles. The guards abused their power and the prisoners let free what tugged them into their reality as humans. The study was stopped before the two weeks, however it proved to be too late....   [tags: Film] 922 words
(2.6 pages)
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The Catalase Experiment - The Catalase Experiment Aim: The aim of this experiment is to find out what affect the temperature has upon the speed of the decomposition of hydrogen peroxide when a biological catalyst is used; the enzyme catalase. Back ground: ============ Hydrogen peroxide is a decomposition reaction. This means that the hydrogen peroxide, if left for long enough, will eventually decompose. Hydrogen peroxide → Hydrogen + Oxygen 2H2O2→2H2O + O2 (Aq) (L) (G) Using a catalyst can speed up this reaction....   [tags: Papers] 830 words
(2.4 pages)
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Chromatography Experiment - Chromatography Experiment Implementing The plan that I was going to follow was altered in many ways. These alterations were needed to improve the experiment and therefore improve the results. Therefore the real method that was carried out is explained below. First of all a piece of Chromatography paper was taken and a line was drawn 2 cm above the bottom of the page. This was the origin line. On this line 10 crosses were drawn which would be the starting point of the samples....   [tags: Papers] 1277 words
(3.6 pages)
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Aspirin Experiment - Aspirin Experiment Abstract An experiment was carried out in which salicylic acid was esterified on its hydroxyl group using acetic anhydride. The product was acetylsalicylic acid, or aspirin, and acetic acid. The esterification was carried out under reflux using concentrated sulphuric acid as catalyst. The product was crystallized and the yield determined to be just over 36%. The melting point of the prepared product was 1140C which differed from the published melting point of 1350C - 1400C Aim The focal aim of the experiment was to perform a chemical reaction to produce acetylsalicylic acid (Aspirin)....   [tags: Papers] 1387 words
(4 pages)
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Biology Experiment - Biology Experiment Prediction The temperature I thought the experiment would work best at is 37 c. I think this because your body temperature is 37oC and it is same as cows. Rennin is from a cow and that is what we used. Rennin is an enzyme and it is affected by temperature. Theory The lock and key theoryis simply a way of describing how specific an enzyme is for its substrate. Just like a lock requires a specifically shaped key for it to work so does an enzyme. Each enzyme is a protein which is a polypeptide chain folded into a complex 3 dimensional structure....   [tags: Papers] 954 words
(2.7 pages)
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Thermistor Experiment - Thermistor Experiment Aim: To investigate how the temperature affects the resistance of a thermistor Background Information: The resistance determines the difficulty in which energy can pass through a circuit. It is measured in Ohms (Ω) and the equation for this is; Resistance (Ω) = Voltage (V) Current (I) A thermistor is a type of variable resistor that's resistance is affected by heat and in my investigation I am experimenting with the manor in which temperate affects the resistance in a thermistor....   [tags: Papers] 2502 words
(7.1 pages)
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Osmosis Experiment - Osmosis Experiment Osmosis is the movement of water through a semi permeable membrane, separating solutions of different concentrations. The water passes from a region of high concentration to a region of low concentration, until the two concentrations are equal in concentrations of water. A semi permeable membrane allows small molecules to pass through such as water and stops larger molecules such as sugar. Osmosis diagram =============== Key: Semi permeable membrane Sugar molecule Water molecule So I plan to find out the concentration of the inside of a potato cell by how much water is lost through a potato by osmosis....   [tags: Papers] 678 words
(1.9 pages)
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Chemical Experiment - Chemical Experiment My aim is to plan, investigate, analyse and evaluate the effect of varying the concentration of hydrogen peroxide in the reaction with potato catalase by measuring the Volume of oxygen produced. Introduction [IMAGE] Catalase releases oxygen from hydrogen peroxide (H202) and is used in the making of foam rubber from latex. Many kinds of enzymes are found in each cell but because they are used over and over there may be only a small amount of each enzyme present....   [tags: Papers] 655 words
(1.9 pages)
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Chemistry Experiment - Chemistry Experiment For a fair test I must only vary 2 variables and that is the thing I am investigating (independent variable), all the remaining variables must be kept constant. I have to make sure this experiment is a fair test because if not it will affect the accuracy of my results, and as a consequence I will be unable to compare my results fairly and calculate a precise molar heat of combustion. Therefore I will not be able compare my results to the theoretical results fairly and as a consequence the conclusion I will draw will be inaccurate....   [tags: Papers] 1922 words
(5.5 pages)
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Evaluation of an Experiment - Evaluation of an Experiment An overall criticism of my method is the way I have chosen the three locations from each area. As I have simply estimated were I think is the beginning, middle and end of he area I am studying it is not very accurate. It would have been more accurate if I, for example, did it ever 10m as this would be more logical than measuring the entire area and finding out the exact beginning, middle and end as the areas studied were very large. In the method used to obtain the results for the top layer, I don not think there are many improvements as it is a simple method in which not much can go wrong....   [tags: Papers] 469 words
(1.3 pages)
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Biology Experiment - Biology Experiment Background Information All plant cell membranes are partially permeable, which means they allow some substances to penetrate them but not others. Whether water enters the cell by osmosis will depend on the balance between inside and outside water potentials. If the solutions on each side of the partially permeable membrane are equal, then there will be no movement of across the membrane. This is called equilibrium and the solutions are called isotonic....   [tags: Papers] 894 words
(2.6 pages)
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Diastase Experiment - Diastase Experiment Diastase is an enzyme that digests starch. It is most active at a normal pH (almost neutral), diastase comes from the Greek word diastases; A natural group of enzymes (Amylase and Amylase) that have the ability to break down starchy carbohydrates into simpler sugars acceptable to the yeast. Enzyme, having physiological, commercial, and historical significance, also called Amylase. Amylase, like other enzymes, works as a catalyst, i.e. it is unchanged by the reaction, but makes the reaction easier by reducing the energy required for it to happen....   [tags: Papers] 717 words
(2 pages)
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Neutralization Experiment - Neutralization Experiment AIM:- To investigate how heat is given out in neutralizing sodium hydroxide (NaOH) using different concentrations of Hydrochloric Acid. Background Information:- Substances that neutralize acids are called alkalis. An acid is a substance that forms hydrogen ions (H+ ) when placed in water. It can also be described as a proton donor as it provides H+ ions. An example of an acid is hydrochloric acid (HCl), Sulphuric acid (H2SO4) etc. An alkali is a soluble base and forms hydroxyl ions (OH-) when placed in water....   [tags: Papers] 1068 words
(3.1 pages)
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Yeast Experiment - Yeast Experiment What effects will be observed by varying concentrations of yeast on the rate of reaction of the enzyme catalase when used in hydrogen peroxide solution. Introduction ============ A preliminary experiment was carried out to see what factors would affect the biological enzyme catalase. Enzymes are protein molecules produced by cells to carry out specific functions. They are known as biological catalyst which are present in most living tissue. There are thousands of different enzymes each catalyzing just one specific reaction....   [tags: Papers] 2104 words
(6 pages)
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A Racism Experiment - Racism, I have heard this term used all my life. Growing up in the South I would hear things from adults that were supposed to guide and build me into a respectable adult. Instead I heard that white was right, and if someone wasn’t white then they were treated differently. Racism is usually defined as a race issue; it is also linked to social standing, income and religion. The fight against racism is ongoing. There are many agencies that combat the violence and hate that is associated with racism....   [tags: racism,] 946 words
(2.7 pages)
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Enzymes Experiment - Enzymes Experiment Aim To find out the effect of raising the amount of enzyme on the breakdown of Hydrogen Peroxide. The Enzyme Enzymes control the speeds of cell reactions. They are referred to as catalysts. The enzyme I am using is Catalase, an enzyme found in potato. The substance that I will use which the enzyme will help to react is Hydrogen Peroxide (the substrate). Catalase is used to speed up the decomposition of Hydrogen Peroxide into water and oxygen. It can do this as the molecules of the Catalase and Hydrogen Peroxide fit together, and then the reaction can take place where oxygen and hydrogen is given off....   [tags: Papers] 897 words
(2.6 pages)
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Osmosis Experiment - Osmosis Experiment Aim: To investigate the factors which affect osmosis in potatoes and to investigate one in detail. Introduction: Osmosis is the net movement of water from a high concentration to a low concentration through a semi permeable membrane. This diagram demonstrates it. In plants osmosis takes place between the cytoplasm and the solution outside of the cell. The effects of osmosis on the plant cell are visible to the eye. When a plant cell is placed in a less concentrated sugar solution the water passes through the cell wall, cell membrane and cytoplasm and into the central vacuole....   [tags: Papers] 1667 words
(4.8 pages)
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Parachute Experiment - Parachute Experiment Prediction My prediction is that as the weight of plastercine increases the time taken for the parachute to reach the ground will decrease I think this because when the weight has just been dropped it is going slowly, but as it falls through the air it will gain speed until it reaches its terminal velocity. The weight does not change but the A.R gets bigger until it equals out the downwards force of gravity, so when the weight is larger it will have to fall further before the forces equal and it reaches terminal velocity....   [tags: Papers] 592 words
(1.7 pages)
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Electroplating Experiment - Electroplating Experiment Aim To find the amount copper gains or loses on the electrodes using different amounts of current each time during electrolysis. How the changing of current affects the electroplating of copper. Introduction Electroplating is generally carried out in order to improve the appearance or corrosion resistance of the surface of a metal by electrodepositing a thin layer of metal ion on it. The metal substrate to be coated is made by the cathode in an electrolytic cell....   [tags: Papers] 2202 words
(6.3 pages)
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Electrolysis Experiment - Electrolysis Experiment Aim: To find out how current affects the rate of electrolysis. Pre-test: Pre-test Apparatus: 1. Power Pack 2. Stop watch 3. 3 wires 4. Amp meter 5. A piece of Card 6. stop watch 7. Top pan balance Pre-test Method: Text Box: 1. Check to see if all the apparatus work by forming a small circuit with a bulb 2. Collect apparatus and set them out like the diagram below. Ensure that the positive wire leads to the anode and the negative leads to the cathode....   [tags: Papers] 1667 words
(4.8 pages)
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Circuits Experiment - Circuits Experiment Aim To see prove the equation Resistance (Ω) = Potential Difference ÷ Current. This is to be done by setting up a series of circuits containing a voltmeter, an ammeter, cells for the different potential differences, and light bulbs for causing the resistance. Hypothesis I predict that as I increase the amount of bulbs in the circuit the resistance will increase, this is because the electricity must flow through a small filament which has a high resistance already; bulbs have high resistance filaments because they give off more light....   [tags: Circuits Energy Electricity Essays] 514 words
(1.5 pages)
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BaBar Experiment - BaBar Experiment Abstract I investigated the L = 1 mesons D*2(2460)0 and D1(2420)0 using data gathered by the BaBar detector at Pep-II. The decay process of these particles is interesting because it could serve to confirm or deny certain predictions made by HQET models. Thus far, the data gathered rougly conforms with measurements made by the CLEO and ARGUS collaborations. The data is still preliminary, however, and as such this paper should be considered merely a summary of the work done thus far....   [tags: Chemistry Science Scientific Essays]
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The Puritan Experiment - The Puritan Experiment The Puritan experiment carried out in New England was a failure. The reason for this was that the people simply lost faith. The contradictions in the religion and the general feeling of betrayal caused the people to reject the ideals that were once held as sacred and perfect. The puritan religion was based on several tenants that, for a most part, contradicted each other. Man's fate was said to be pre determined and salvation was out of his control, but at the same time, man was expected to live a near perfect lifestyle for no truly justified reason....   [tags: Papers] 678 words
(1.9 pages)
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Chemical Experiment - Chemical Experiment Practical to determine whether a relationship exists between the water potential and reducing sugar content of a plant storage organ such as a potato tuber. Aim: To find out if a relationship exists between the water potential and reducing sugar content of potato tubers....   [tags: Papers] 745 words
(2.1 pages)
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Psychology Experiment - I registered to take psychology for a different reason, but I never thought it could aid in the improvement certain skills of mine until I was asked to apply what I have learned to my lifestyle. Upon finding out I had to apply a learning principle of psychology to my life, I was not sure of which aspect I could apply to and benefit greatly from it. I pondered greatly about diverse aspects involving sports, fitness, eating habits, socializing and finally study habits. It was then that I realized upon comparing my study habits back when I was in Ghana to my current state, it has gotten extremely awful....   [tags: Psychology] 660 words
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Experiment In Pupilometry - Introduction: Pupilometry is the study of how a pupil reacts to different emotions and stimuli. The research on the topic of pupilometry is scattered and fairly shallow. Related research has been conducted on facial expressions and their reaction and relation to emotion. There are some relationships to the facial expression research and pupilometry, but these relationships do not tell the whole story. Some interest has been brought up through research in the field of pupilometry and its predictive powers on emotion....   [tags: essays research papers fc]
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Statistics Experiment - Statistics Experiment For my maths coursework I will be conducting an investigation into statistics. I had a choice for this coursework of both statistics on year 10 to 11 school children, and facts about them and also their likes in terms of sport and subjects at school. I chose not to do this project on that information; instead I chose data on 100 different cars, the reason for this is that I like cars more and may perhaps pursue it as a career. I did not want to do a project on data that I have no interest in....   [tags: Papers] 579 words
(1.7 pages)
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Refraction Experiment - Refraction Experiment Aim: To find the relationship between the angle of incidence and angle of refraction for light passing from air to Perspex. Apparatus: Raybox, 12V supply, Perspex block, 30cm ruler, protractor Data Collection: Tries Incident Angle (Degrees) Refracted Angle (Degrees) 1 0 0 2 12 8 3 36 23 4 47 29 5 58 34 6 80 41 Data Processing: Incident Angle (i) (Degrees) Refracted Angle (r) (Degrees) Sin of Incident Angle (i) Sin of Refracted Angle (r) Refractive Index (Sin i/Sin r) 0 0 0 0 0 12 8 0.2079 0.1392 1.49 36 23 0.5878 0.3907 1.50 47 29 0.7314 0.4848 1.51 58 34 0.8480 0.5592 1.51 80 41 0.9848 0.6561 1.50 [IMAGE] Conclusion: Looking at the graph on the previous page we can see a best-fit line drawn on the graph by the computer....   [tags: Papers] 832 words
(2.4 pages)
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Height Experiment - Height Experiment First, I am going to compare the heights of 20 males and 20 females with Histograms to see which sex is taller in general HeiGHT (cm) Frequency Frequency Density 130 - 140 3 3 ÷ 10 = 0.3 140 - 150 2 2 ÷ 10 = 0.2 150 - 160 3 3 ÷ 10 = 0.3 160 - 170 4 4 ÷ 10 = 0.4 170 - 180 6 6 ÷ 10 = 0.6 180 - 190 2 2 ÷ 10 = 0.2 Total number of Males = 20 MALES FEMALES HEIGHT(cm) FREQUENCY FREQUENCY DENSITY 120 - 130 3 3 ÷ 10 = 0.3 130 - 140 4 4 ÷ 10 = 0.4 140 - 150 3 5 ÷ 10 = 0.3 150 - 160 3 3 ÷ 10 = 0.3 160 - 170 2 2 ÷ 10 = 0.2 170 - 180 5 5 ÷ 10 = 0.5 Total number of Females = 20 POINT TO NOTE: Idid not choose to draw a bar chart because all of this data is Continuous Data and if it were discrete data then I would use a bar chart....   [tags: Papers] 1758 words
(5 pages)
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Statistics Experiment - Statistics Experiment Statistics Hypothesis- In my investigation I plan to find out whether my theory that year 10 pupils are better at estimating the length of a stick than year 7 pupils. Plan- In my investigation I plan to use secondary data gathered from both year 7 and year 10 pupils, which I will then do a random sample of which will be used to find the mean, median, mode, range as well as standard deviation which I will then put into groups and frequency tables to compare and from this I will hopefully be able to come to a conclusion....   [tags: Papers] 1089 words
(3.1 pages)
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Pythagoras Experiment - Pythagoras Experiment Aim: To investigate the relationships between the lengths of the 3 sides of the right angled triangles and the perimeters and areas of these triangles. Task 1: a) The numbers 5, 12, 13 satisfy the condition. 5² + 12² = 13² Because 5² = 5x5 = 25 12² = 12x12 = 144 13² = 13x13 = 169 And so 5² + 12² = 25 + 144 = 169 = 132 b) The Numbers 7, 24, 25 also satisfy the condition. 7² + 24² =25² Because 7² = 7x7 = 49 24² = 24x24 = 576 25² = 25x25 = 525 And so 7² + 24² = 49+ 576 = 625 = 25² Task2: The perimeter and area of the triangle are: Perimeter = 5 + 12 + 13 = 30 units Area = ½ x 5 x 12 = ½ x 60 = 30 square units a) 5 12 13 [IMAGE] b) 24 7 25 [IMAGE] Perimeter = 7 + 24 + 25 = 56 units Area = ½ x 7 x 24 = ½ x 168 = 84 square units [IMAGE] Length of shortest side Length of middle side Length of longest side Perimeter Area 3 4 5 12 6 5 12 13 30 30 7 24 25 84 84 Task3: Length of short side is going to be in fixed steps meaning that this is a linear sequence and the length of middle side and longest side is actually a quadratic sequence because they are not in fixed steps and in geometric sequence....   [tags: Papers] 1227 words
(3.5 pages)
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Yeast Experiment - Yeast Experiment Yeast is a single celled fungus (commonly used to ferment alcohol). Yeast is a facultative anaerobe. This means that it can release energy from food through anaerobic or aerobic respiration. Yeast will respire aerobically if oxygen is present use oxygen if it is present, If it does so; it will break down its respiratory substrate to release energy for the formation of ATP....   [tags: Papers] 3758 words
(10.7 pages)
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Levittown Experiment - Levittown Experiment Levittown project was taken up in the U.S. after the end of Second World War, with the aim of providing mass housing facilities to people in the wake of increasing urbanization and problems of accommodating large population in limited urban area (Friedman. 1995). The first of Levittown apartments were constructed on Long Island, New York and they symbolized the modern trends of urbanization and housing developments (Clapson. 2003). This paper shall study the impact of Levittown project on trends of further urbanization and analyze the aesthetics of design and development involved in it....   [tags: Construction Housing Architecture] 1078 words
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Punishment in the Milgram Obedience Experiment - The Milgram obedience experiment began in July of 1961. The experiment was conducted by Stanley Milgram, a psychologist at Yale University. The experiment was met to measure the willingness of participants to obey an authority figure who instructed them to perform an experiment that was against their moral views. Milgrams participants for his experiments were from all backgrounds. The subjects ranged from college graduates to people that had not finished grade school. (Milgram’s Experiment on Obedience to Authority) They were told the experiment would study the effects of punishment on a person’s learning ability....   [tags: Psychology, Psychology Research, Research Paper] 807 words
(2.3 pages)
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The Implications of the Stanford Prison Experiment - The Implications of the Stanford Prison Experiment In 1971 Dr Philip Zimbardo conducted an experiment in the basement of Stanford University. This involved imprisoning nine volunteers in a mock up of Stanford prison, which was policed by nine guards (more volunteers). These guards had complete control over the prisoners. They could do anything to the prisoners, but use physical violence. The subjects were all students applying for summer jobs to get some money. To make it a fair test, the subjects were made to take psychological tests to make sure they were mentally fit....   [tags: Papers] 737 words
(2.1 pages)
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Burning Alcohols Experiment - Burning Alcohols Experiment [IMAGE]We are going to be doing an experiment that will show us how much heat energy is produced by burning an alcohol. The amount of heat given out when a mole of fuel burns is called heat combustion( H combustion). We will test how much energy is produced by calculating the heat given of from the alcohol burned by the spirit lamp. In this each experiment the variable is going to be the different alcohols used. I am going to have four different alcohols; Methanol, Propanol, Ethanol and Butanol....   [tags: Papers] 1516 words
(4.3 pages)
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The Simple Pendulum Experiment - The Simple Pendulum Experiment General Plan The first thing I am going to do is outline a general plan for this experiment. In this experiment, I am going to be measuring the effect of two variables on the time of one oscillation of a simple pendulum. The two variables that I have chosen are the length of the pendulum's string and the mass of the pendulum's bob. I will vary these two items and record results for the time of one oscillation of a pendulum with different mass/length of string....   [tags: Papers] 2064 words
(5.9 pages)
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Reviewing Zimbardo’s Experiment - ... The American Psychological Association has since established guidelines for diversity in experiments that are conducted. In the book Research and Evaluation in Education and Psychology Donna Mertens explains the guidelines for diversity as “recognition of the ways in which the intersection of racial and ethnic group membership with other dimensions of identity…enhances the understanding and treatment of all people” (Mertens 313). Another issue in Zimbardo’s experiment was in the treatment of the prisoners....   [tags: Case Study, solution]
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Yeast Respiration Experiment - Yeast Respiration Experiment Temperature (°C) [IMAGE]Number of Bubbles 10 0 20 14 30 17 40 17 50 19 60 24 70 35 80 48 Data Analysis and Conclusion The data shows a clear rise in yeast respiration as the temperature is raised. Although an optimum temperature is not evident, it can be seen that temperatures exceeding 60°C speed up the reaction. This shows the general rule that reactions become faster when the temperature is increased....   [tags: Papers] 355 words
(1 pages)
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Rutherfords Gold Foil Experiment - Rutherford's Gold Foil Experiment Rutherford started his scientific career with much success in local schools leading to a scholarship to Nelson College. After achieving more academic honors at Nelson College, Rutherford moved on to Cambridge University's Cavendish laboratory. There he was lead by his mentor J.J. Thomson convinced him to study radiation. By 1889 Rutherford was ready to earn a living and sought a job. With Thomson's recommendation McGill University in Montreal accepted him as a professor of chemistry....   [tags: essays research papers] 783 words
(2.2 pages)
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Osmosis in Potato Tissue Experiment - Osmosis in Potato Tissue Experiment Background Information Osmosis can be defined as the movement of water across a semi-permeable membrane from a region of high water concentration to a region of low water concentration. The semi-permeable membrane allows small particles through it but does not allow large particles such as sodium chloride. Osmosis will continue until a state of equilibrium is reached i.e. there is no area with a higher or lower concentration than another area....   [tags: Papers] 1772 words
(5.1 pages)
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The Stroop Effect Experiment - The Stroop experiment can be traced back as far as the nineteen century around the time of some particular works of Cattell and Wundt. The experiment was first written about in 1929 in German. The experiment was name after John Ridley Stroop after he had written the article “Studies of interference in serial verbal reactions,” which was published in 1935.there have been over 700 replications of this experiment The experiment is a demonstration of reaction time of a task . The Stroop experiment employs two basic processes of cognition; attention (“the concentration of mental effort on sensory or mental events”) and automaticity (“a cognitive process that does not require conscious thought as a result of existing cognitive structures or highly practiced tasks.”)....   [tags: Stroop Effect, Experiments, science, ]
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The Milgram Experiment of Obedience - Milgram’s experiment of obedience was done in 1961 soon after WW2 and the trials for war crimes against the Nazi’s were being done. An ad was placed in the newspaper for a Memory and Learning Experiment at $4.50 an hour, but the experiment was ultimately on Obedience. The experiment was conducted on behalf of Adolph Eichmann who was convicted of war crimes, and crimes against humanity, but he was only following orders. Eichmann filled out death warrants but never carried out the killings. The objective of the experiment was to find out if people would obey higher authority even though what they were doing was morally wrong....   [tags: essays research papers] 432 words
(1.2 pages)
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Experiment of Starch Mixed with Amylase - Experiment of Starch Mixed with Amylase Planning Aim: The aim of this experiment is to learn what happens when starch is mixed with amylase. I also intend to investigate the effects of changing one or more of the variables involved in the experiment. Key Factors: Listed below are each of the key factors featured in the experiment and the affect that each one may have upon the investigation… Temperature: The temperature of the room when the experiment is being carried out will determine the rate at which the amylase works since amylase is most efficient at body temperature, which is between 37-40°C, and less effective in more extreme conditions....   [tags: Papers] 1882 words
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Bouncing Ball Experiment - Bouncing Ball Experiment A squash ball is a hollow ball made of rubber, with air inside. Before starting a game of squash, most players will "warm up" the ball by knocking it around the court. This raises the temperature of the ball and increases the "bounciness". In this experiment you can investigate the effect of temperature on the height to which a ball bounces. An alternative experiment is to investigate how the height of each successive bounce changes. Planning your experiment The height to which the ball bounces will depend on the initial height and the temperature, so you must decide which of the variables you are going to investigate and how you can ensure that your experiment is a "fair test"....   [tags: Papers] 764 words
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