Water Wheel Work‚ Power‚ and Efficiency Pre-Lab Preparation: Purpose: The purpose of this lab was to create an efficient water wheel that would produce a productive time in lifting the cup of nuts and bolts that was attached to the pipe used in rotating out water wheel. The more efficient our wheel was the better the time we would have in lifting our cup. We were then able to observe the work that was needed to turn the axel‚ the time that is taken to bring the cup of washers to the axel‚ and
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Food Contamination Definition Food contamination refers to foods that are spoiled or tainted because they either contain microorganisms‚ such as bacteria or parasites‚ or toxic substances that make them unfit for consumption. Food contamination is a serious issue because it results in foodborne diseases. Hence‚ awareness of potential sources of food contamination is an important component of good nutrition. Food contamination refers to the presence in food of harmful chemicals and microorganisms
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Lab Title: "The Effect of Salt on the Boiling Point of Water" Lab Question: How does adding salt to water affects it’s boiling point? Prediction : In this paper‚ a newly proposed model based on solvation between pure solvent and salt for prediction of salt effect on vapor–liquid equilibria is presented by using only the vapor pressure depression data of pure solvent+salt systems that compose the mixed solvent with salt system Materials : 200 mL of distilled water‚ 2 beakers
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The purpose of this lab was to model the significant differences in density that oceans experience when glaciers and polar ice caps melt. It demonstrated that the variation in density greatly affects salt water. I discovered that the increase in freshwater causes a decrease in density. I made three claims. First‚ the higher the salinity of the water is‚ the denser it will be. This was shown in my data by the fact that‚ with 0mL of fresh water‚ the density was 1.108 g/mL For every milliliter of fresh
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The Effects of Harmful Algal Blooms and Eutrophication Introduction Eutrophication‚ by definition‚ is a process where bodies of water receive excess nutrients that stimulate excessive plant growth. Eutrophication results from continuous pollution in the form of agricultural run-offs or sewage outflows. Fertilizers and sewage are both rich in nitrogen and phosphorus‚ which are both nutrients essential for plant growth. However‚ these nutrients are typically low in content in aquatic environments
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Water Testing Lab Conclusion In this lab‚ chemical tests were used to check for the presence of calcium‚ chloride‚ and sulfate ions in water samples. To do this‚ the testers started with five samples: a reference‚ a sample of only the chemical being tested for‚ a control‚ distilled water‚ two home water samples‚ and a school water sample. To test for the ions in the water‚ a chemical that would react with the ion and create a precipitate was added. If the precipitate was not easily visible‚ a
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Cross-contamination from endoscopes to patients are a noted problem throughout endoscopy units across the country. The media has reported exposure to harmful bacteria and viruses following endoscopic procedures from inadequately cleaned scopes‚ the efficacy of high level disinfectants used in reprocessors and the design of the scopes. Legislatures are now questioning the types of infection control programs within endoscopy units and whether qualified personnel are being hired as endoscope technicians
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In conclusion‚ after conducting the lab‚ the emergent properties of water were tested and proved. These trials and experiments were able to verify the adhesion‚ cohesion‚ polarity‚ temperature stabilization‚ solvency‚ and density changes exhibited by water. During the glass and wax paper lab‚ we observed the adhesive properties of water. When a droplet of water touched the glass‚ it dispersed immediately. The droplet placed on the wax paper remained intact and in droplet form. Also‚ when the
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Shantelle Johnson April 8‚ 2012 H4 Introduction When food is unsafe for consumption is called food contamination. Food contamination occurs when foods are spoiled because they might contain microorganisms‚ such as bacteria ‚ parasites‚ or toxic substances that make them unsafe for consumption.Bacteria and parasites on uncooked food can linger on the food if not handle or cooked properly. Food contamination is serious because it results in diseases that affect appromiaxally seventy-six million people
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The Center for Disease control has estimated that illnesses directly resulting from food contamination cause approximately 76 million illnesses‚ 325‚000 hospitalizations‚ and 5‚000 deaths each year in the United States. The rise of food-related illnesses can be mostly attributed to increased eating out. Half of every dollar spent on food in this country is spend on food prepared outside of the home. As the amount of people involved preparing our food rises‚ so does the risk of contracting an illness
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