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Essay on SCI 207 Week 4 Lab

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Charles Jacquier Lab 4 – Energy Sources and Alternative Energy SCI 207 Professor Selhorst Experiment 1: The Effects of Coal Mining Table 1: pH of Water Samples Water Sample Initial pH Final pH (24-48 hours) Pyrite 5 5 Activated Carbon 5 7 Water 5 5 POST LAB QUESTIONS 1. Develop hypotheses predicting the effect of pyrite and coal on the acidity of water? a. Pyrite hypothesis = If pyrite is added to water, it will make the water more acidic. b. Coal hypothesis = If the activated carbon is added to the water, it will make the water more acidic. 2. Based on the results of your experiment, would you reject or accept each hypothesis that you produced in question 1? Explain how you determined this. a. …show more content…

Based on the results of your experiment, would you reject or accept each hypothesis that you produced in question 1? Explain how you determined this. Direct vs indirect accept/reject =Rejected. The motor was just as fast when the solar panel was set up at a 45 degree angle Direct vs reflected accept/reject = Accepted. When the foil was reflected at the solar panel, the motor moved faster. Direct vs shaded accept/reject = At 25% shading-Rejected-The motor moved just as fast as when the solar panel was completely exposed to sunlight. At 50%-Accepted-The motor moved slower than when the solar panel was completely exposed to sunlight (speed medium to fast) At 75%-Accepted-The motor moved very slow compared to when the solar panel was completely exposed to sunlight (Very slow) Direct vs filtered accept/reject = Rejected-Upon being covered by the red, yellow, green, and blue cellophane, the motor moved the same as in direct sunlight 3. Does increased exposure to the sun’s light produce more current? Explain how you know this based on your data. Answer = YES. The more exposure the solar panel had to the sun, the faster the motor moved. Through a variety of trials with the solar panel and exposure to the sun, it was determined that the more exposure the solar panel had, the

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