Photoelectric Effect: Determining Planck’s Constant Friday‚ Section 006 TA: Yilikal Ayino John Greavu with Daniel Erickson & Kevin Haar January 31‚ 2014 PreLab Up until the eighteenth century‚ particle theories of light dominated physics‚ primarily due to the work of Isaac Newton. Thomas Young’s 1805 famous double-slit experiment‚ which showed that light mimics a wave‚ extinguished some of these early views. However‚ in 1887‚ Heinrich Hertz – who is‚ coincidentally‚ perhaps better known for definitively
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______________________ Evaluation of the Gas Law Constant Objectives In this experiment‚ we will determine the Ideal Gas Constant‚ R‚ which relates the number of moles of gas present to its volume‚ pressure and absolute temperature. Background To see how "R" was derived‚ we must look at the proportionalities defined by the other fundamental gas laws. For example‚ Charles’ Law showed us that the volume of a gas sample is proportional to its absolute temperature at constant pressure. Thus V ∝ T abs
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Results The results presented by the graph showed that there was a positive relationship/trend between temperature and light absorbance. The higher the temperature of the water surrounding the beetroot‚ the more coloured the water around the beetroot was. This is shown in the graph by: at 0°C‚ the water surrounding the beetroot was fairly pink and had an averaged amount of 0.074 absorbency. At 80°C‚ the water surrounding the beetroot was very pink almost red‚ and had an average of 0.982 absorbency
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GE’S TWO DECADE TRANSFORMATION: JACK WELCH’S LEADERSHIP 1. How difficult a challenge did Welch face in 1981? How effectively did he take charge? When Reg Jones retired and Jack Welch became GE’s CEO in 1981‚ the country was facing a major recession‚ with high inflation and unemployment rates‚ reminiscent of those 50 years earlier during the Great Depression. Thousands of businesses were failing‚ not only affected by the national economic conditions but also
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[pic] Druga gimnazija‚ Sarajevo IB Diploma Programme Extended essay Business and Management Standard Level TOPIC : Human Resource Management Research question What motivational methods “Bosnalijek” might apply to increase employees’ motivation and improve performance? Word count: 3546 Supervisor : Dzenana Rustempasic Candidate name: Adna Hodzic Candidate number: 001258-015 Sarajevo‚ December 2009. TABLE OF CONTENTS |Title page
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Enzymes are a type of protein. They are catalysts meaning they speed up the rate of the reaction. Enzymes activity depends on the concentration of the substrate‚ temperature and the pH. The more concentrated the substrate is the more reactive the enzyme is. The optimal pH for an enzyme is 7.5 and the optimal temperature for an enzyme is 53 Celsius. Extremes in the temperature and the pH of an enzyme can denature therefore destroy it. The enzyme that is in this experiment is Amylase. Amylase is found
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The graph shows that the respiration rate does increase as the yeast concentration rises‚ but levels off and eventually reached its saturation point‚ or decline‚ which occurs at 8.5g. This decline may occur because there are too many yeast molecules in comparison to the glucose‚ which may lead to yeast cells hindering a collision thus lessening the reaction. The respiration rate increases as more yeast is added because it gives more opportunities for molecular collisions and so the amount of successful
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One of the most economically prosperous time periods in American history is the 1920’s‚ also known as the Roaring 20’s. This economic upturn occurred shortly after the conclusion of World War I and the short recession that followed the war. Some industries flourished during this time while farming became a cancer to the economy. To help the plight of the American farmer congress did as much as it could in passing legislative bills like the Emergency Tariff of 1921‚ the Fordney-McCumber Tariff
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In the experiment‚ the effect of light intensity on the rate of photosynthesis will be tested. Photosynthesis is the process in which autotrophic plants create their own food (energy) from sunlight. Photosynthesis involves three ‘ingredients’ or reactants‚ carbon dioxide‚ water‚ and light energy (sunlight). Carbon dioxide and sunlight come in through a leaf’s stomata which are tiny holes‚ and water is absorbed through their roots. When all of these reactants are combined in a plant’s chloroplasts
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The effect on rate of an enzyme catalysed reaction by different objectives which include effect of substrate‚ temperature‚ ph and effect of a competitive inhibitor phosphate ions. This is determined by the reaction of hydrolysis by p-nitrophenylphosphate (PNP) as a substrate by the enzyme phosphatase. Abstract The hydrolysis of p-nitrophenyl phosphate has been studied in human red blood cells. To see if hydrolysis was related to the functioning of the sodium pump. Acid phosphatase catalysis’s
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