screen)‚ we measured the start time of the original snap and the echo snap both. 6. We recorded both start times on a table and recorded the difference between them. 7. Repeated step 3-6 for a total of two more trials. Diagram Figure 1: Simple Lab Setup (Found on the D2L page) Figure 2: Example of Computer Program (https://mauriceabarry.files.wordpress.com/2014/01/speed-of-
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Purpose: The purpose of the experiment is to calculate the enthalpy change occurring in the first of reaction of sodium hydroxide with hydrochloric acid and sodium hydroxide with ammonium chloride. Using Hess’ Law and the results for the enthalpy change of the first two reactions should give the enthalpy change of the third reaction of ammonia with hydrochloric acid. Procedure: Part 1: Construct a calorimeter of two nested stereophony cups where the cover has a hole to fir a thermometer. Measure
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and is my intellectual property. It does not contain the ideas or writing of other individuals/authors. Sarah SanAngelo March 4‚ 2015 Author Date 8 Lab Section # Alex Fry Lab Partner BIOL 1208 Writing Assignment 1 Results Worksheet Lab Topic: Temperature Introduction: In this experiment‚ water and potato enzymes were mixed to create a solution and placed into three test tubes. The first test tube was placed in 0 degrees Celsius‚ second
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To Test Charles’ Law and estimate Absolute Zero In this IB Lab you will be assessed on the following criterion Conclusions and Evaluation Aim: Physics has many hundreds of laws and these can be tested in experiments to see if they are true. In 1787 the French scientist‚ J.A.C. Charles‚ published a law connecting the volume and temperature of gases. Your task is to see if you agree with his law. Another thing you have to consider is “ is my experiment accurate enough to prove or disprove the
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has taken place and the powder granules have diffused into the hot cup of water. On the other hand‚ every day we become unintentional witnesses of osmosis when the roots of the plants try to suck up the water from the soil (1). The purpose of this lab is to show clearly in an understandable way how diffusion and osmosis happen and to help one realize the way they occur. If a cube of beat is put in hot water (5 trials – 5 temperatures: 60 ºC‚ 70 ºC‚ 80 ºC‚ 90 ºC‚ and 100ºC)‚ then the mass of the
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color intensity will be a 5. I hypothesize that at 55 degrees Celsius‚ the color intensity will be a 7. I hypothesize that at 70 degrees Celsius‚ the color intensity will be a 10. (Campbell et.al‚ 2006) Method I really enjoyed doing this lab experiment and am excited for more experiments. The key part about having a successful experiment is to be well organized. Before I started I made sure I had everything out that I was going to need. Next‚ I wrote down my hypothesis for each piece
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Data collection and processing Qualitative observation Before * Blue solution of copper sulfate * Grey zinc powder During * Blue color solution changes to greyish black * Heat is given out‚ so the surroundings become hotter. After * Grey powder remains on the sides of the cup * Precipitate formed at the bottom of the cup List of chemicals and apparatus used Chemicals used Copper sulfate solution‚ 1 mol dm-3 25g of zinc powder Apparatus needed
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Elena Mesa Nov. 15‚ 2013 Ms. Lelacheur IB Biology HL The Effect of Temperature on Beet Root Membranes What is the affect of temperature on beetroot membranes? Hypothesis: It is hypothesized that as the temperature increases‚ the deeper red the beetroot water will be. At higher temperatures the proteins in the beetroot plasma membrane will denature‚ leaving holes in the membrane and allowing the red pigment in the cell sap to seep out into the water around it. Variables: Dependent-The
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Yeast Experiment – Temperature Yeast fermentation is affected by temperature as an outcome of the many different temperatures that yeasts are exposed to. The accepted value for yeasts optimum temperature is approximately 66.667 degrees Celsius. If yeast is exposed to their optimum temperature‚ then this would create the most amount of fermentation. In this experiment however‚ the yeast were exposed to temperatures below their optimum. The chemical reactions within yeast are facilitated by enzymes;
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During the seventeenth century in England‚ outside temperatures reached so low during the winter that it is actually considered to be a “mini ice age” by scientists today. During this time‚ people were still somewhat fatalistic and believed that cold was an act of god‚ and that people should just leave it alone. That was until an alchemist named Cornelius Drebbel came along. Drebbel bet the King he could turn summer into winter by chilling the air in the Great Hall of Westminster. Drebbel did
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