that can temporarily inactivate areas of the brain is an experimental study. An experimental study is a controlled experiment in which the researcher has control over one variable‚ called the independent variable. The researcher then manipulates the independent variable and studies how that affects the variable he is measuring‚ called the dependent variable. Because this experiment includes the study of how the independent variable‚ in this case the “miracle” drug‚ affects the dependent variable
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Trial # Guess Observation Explanation Trial 1 The dyed red water will not seep into the blue cold water. My guess was indeed correct and red water did not interfere with the blue water. Because the molecules in the blue water are much closer together because its cold and well the red water has warm/hot water and the molecules are everywhere. The molecules in the blue water are so dense that they’re making a layer so that the molecules from the red jar do not come through. Trial 2 I think
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(1) Answer to Question in lab manual. NO introduction/background etc. 1. What is the retention time for caffeine? Retention time for caffeine : 4.149+4.142+4.152+4.1454 = 4.15 2. What is the retention time for benzoic acid? Retention time for caffeine : 2.651+2.817+2.857+2.9274 = 2.81 3. How are the retention times for caffeine and benzoic acid related to their chemical structure and the nature of the chromatographic
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Discussion: Conclusions: • For both meters it was noted from plots that the difference in pressures are directly related to the rate of discharge. • Coefficient of discharge have a varying value depending on the rate of discharge‚ where in the Venturi meter the value of Cd increase gradually at first with increasing the rate of discharge till a point approaching one‚ then started to descend with further increment in the rate of discharge. • The Coefficient of discharge " Cd
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Purpose: To investigate the relationship between the speed of sound in air through the pulse-echo experiment and the measured air temperature. Hypothesis: I believe the measured air temperature will affect the speed of sound because sound waves are longitudinal waves composed of the alternating compressions and rarefactions in air. If the air temperature is below 0°C‚ then the speed of sound would be lower than 331.6 m/s and if the air temperature is above 0°C‚ then the speed of sound would be higher
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Experiment #7 Fall 2014 Dehydration of an alcohol NAME Nick Weinberger POSTLAB 1. Show the mechanism for the dehydration of -tetralol under conditions employed in the lab. Show all intermediates‚ and show electron flow with arrows. 2. What general mechanism most likely applies to this reaction (SN2‚ E2 etc)? E1 3. Why was acid employed in this reaction? The acid was used to protonate the leaving group (OH) to form water which is a much better leaving
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Discussion An amount of 853 mg of alcohol was obtained in the flask. After the experiment was performed‚ amount recovered was 1259mg (I think you have these flipped). Percent yield of the crude product was 67.75%. (What does this percentage mean?) The IR spectrum of purified product identified the Arene strand of 2969.71 indicating C-H stretch. Ester which indicated a C=O stretch of a 1750-1735. Aliphatic amines showed an absorption band of 1217.62 indicating a C-N stretch. (This makes no sense‚
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For my norm experiment‚ I chewed with my mouth opened as I sat for dinner with my friends. We went to got eat at a Steakhouse‚ which I forgot the name of‚ for my friend’s twentieth birthday. I was a little hesitant at first to perform the task because personally if someone else around me did it‚ I would be a little disgusted. I however‚ decided to do it because I couldn’t think of another ‘norm’ experiment to perform. Once I ordered the food and the server came to hand it to us‚ I thought of a way
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Integrated Physics and Chemistry – Unit 2: The Structure of Matter Experiment: Atomic Structure In this experiment‚ you will have a chance to test the hypothesis that Ernest Rutherford used when determining the size of the nucleus. In his "gold foil experiment‚" Rutherford shot alpha particles at gold atoms. Once he realized that the alpha particles were hitting a concentrated positive mass‚ he developed the nuclear model of the atom. Next‚ he set out to determine the relative size of the nucleus
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y is the distance from the neutral axis to the point of interest and I is the moment of inertia. 2.0 OBJECTIVES 2.1 EXPERIMENT 1 To investigate‚ for a simply supported beam carrying a central point load‚ a) The relationship between the deflection and the applied loads b) The effect of variations in length and cross sectional dimensions on the beam compliance 2.2 EXPERIMENT 2 To investigate‚ for a cantilever beam carrying an end point load‚ a) The relationship between the deflection and
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