1. Dancing Raisins Here’s another quick and easy science experiment. All you need is a glass of clear soda‚ such as ginger ale or club soda‚ and several small raisins. Fill a glass with soda. Leave about ½ inch (12.5 mm) of space at the top. Drop the raisins in. Those tiny bubbles attaching themselves to the raisins are carbon dioxide (CO2) bubbles. The irregular surface of the raisins enables a lot of CO2 to accumulate. When enough gas bubbles attach to the raisins‚ they act like tiny balloons
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EXPERIMENT 5 TRANSVERSE STANDING WAVES A string attached to a turning fork is set vibrating at the same frequency as the tuning fork. The length and tension in the string are adjusted until standing waves are observed on the string. By knowing the tension in the string and the wavelength of the standing waves‚ the frequency of oscillation of the string and thus‚ the tuning fork is found. This value is then compared to a strobelight determination of the frequency. THEORY
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gradient with the help of energy input and specific transport proteins (Campbell and Reece‚ 2002). For the analysis of cell membrane permeability and the mechanism of controlling water‚ human red blood cell is a convenient specimen through hemolysis experiments ^^^^^. The human RBC osmotic content is about 0.9% NaCl. In hypotonic solutions‚ the cells swell because of water influx and eventually they hemolyze where cell contents including hemoglobin are released into the medium. This can be indicated by
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the electrons as a back donation to the pi orbital in DMSO. In the first experiment‚ I had to synthesized CuCl2~2DMSO to determine which DMSO atom; Sulfur or Oxygen‚ combined to Copper (II) Chloride. I was able to determine it base on finding the melting point and observing the Infrared Spectroscopy. Since copper is a hard metal‚ it will most likely bond to an oxygen atom because they are both hard. In the second experiment‚ I also synthesized RuCl2~4DMSO to determine which DMSO atom; Sulfur or Oxygen
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Aim To find out how the permeability of a beetroot membrane cell is affected by ethanol. To do this we will investigate different concentrations of alcohol (10-70%) and measure the absorbance using a colorimeter to show us how much juice has leaked out. Hypothesis I predict that as the concentration of ethanol goes up‚ the permeability will increase as the ethanol will slowly dissolve more phospholipids (lipid bilayer) and so more anthocyanin (the beetroot juice) will leak out of the membrane
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A minimum wage is introduced into an experimental labor market characterized by gift exchange. In the experiment‚ subjects are randomly divided into two groups‚ including manager group and employees group‚ with ten subjects in each group. In all periods each manager was matched anonymously with one employee no more than twice and never re-matched in two consecutive periods. In each period‚ the manager makes an individual wage offer to his matched employee and wage offers were written directly on
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In the first experiment‚ the bacteria R. fascians and R. corynebacterioides grew equally well in all conditions of light‚ except ultraviolet light. We tested this by comparing the petri dishes to the petri dishes that grew without light. Here‚ the exposure time was constant for all the lights and no light‚ which is 48 hours. The light sources were different. However‚ none of the lights had an effect on the bacteria‚ for the bacteria just continued to grow normally. The only exception was that UV
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the potential energy is constant along the chain and sharply rises to infinity at the ends. Therefore‚ we can replace the electron system by free electrons moving in a one dimensional box of length . Objective: The purpose of this experiment is to obtain the visible spectra of several cyanine dyes and then interpret them to a simple model of the electronic structure of the π system: the Particle in a Box. Theoretical Model “Particle in a Box” In the Particle in a Box model
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In our past experiments and observations we have found that air is in fact matter we know this because air takes up volume and mass. In the beach ball demo‚ we tested the beach ball without air and the mass was 56.1 grams and then we tested it again with air and the mass equalled up to 56.3 grams. This shows us that air takes up space. In the investigation 1.2‚ we tested 3 demonstrations. And in the second demonstration In demonstration 2 the cup was put into the water‚ upside down‚ the beaker
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NAZI MEDICAL EXPERIMENTS Nazi Medical Experiments Jean Paul Marion-Landais Jackson Memorial School of Radiology Abstract The Nazi Dr.’s performed a vast array of experiments on most if not all of the prisoners they held in their concentration camps. Such experiments caused a great deal of dilemmas across all the nations in the world. Headed by Dr. Josef Mengele one of the most controversial individual that has ever worn the label of Medical Doctor‚ the experiments dealt with how
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