Abstract: This report presents the reason why the ocean does not freeze in the winter. Since the ocean consists of salt water‚ an experiment was done to test the effect of freezing on salt water compared to pure water. The experiment was conducted three times in order to obtain accurate results and eliminate errors. In addition to the salt and pure water experiment‚ a variation of this experiment was created to test other options. In the variation experiment the effect of freezing on sugar water
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Homeland Security: Necessary prevention or invasion of freedoms? “Our nation owes a debt of gratitude to the 9/11 Commission members for their valuable service and important recommendations to improve homeland security.”-Jim Ramstad The United States has for a long time developed many agencies with many different purposes. Some agencies moderate currency while other handle law enforcement. These agencies have always run as single entities within the governmental framework. On September 11‚ 2001 our
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The effect of different wavelengths of light on photosynthesis rate in spinach leaves Abstract: This experiment was performed to test the effect of different wavelengths of light had on photosynthesis. According to the results gathered we can say that if two plants are put under different lights‚ one green and one a normal light‚ that the plant under the normal light will perform photosynthesis at a higher rate than the plant under the green light. This experiment is important because it shows
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Investigation Investigate the amount of heat evolved when magnesium reacts with dilute acids. Planning What I am going to do I am going to find out how much heat is given out when magnesium reacts with a variety of dilute acids. In order to make comparisons between the acids‚ I shall use my results to work out how much heat would be given out if 1 mole of magnesium reacted with an excess of each acid. The acids I shall use are hydrochloric acid‚ sulphuric acid‚ nitric acid and ethanoic acid
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Mass Surveillance: Not A Necessary Tool On September 11‚ 2001‚ it was a normal day in New York City until it ended by the two airplanes crashing into the towers of the World Trade Center. Most Americans experienced the most tragic day in the country’s history. These attacks have had long-term social and personal effects on Americans. Since then‚ the government has expanded its power to engage in massive surveillance. This unprecedented surveillance power‚ which allows the government to secretly
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Put simply‚ photosynthesis is the process of converting light energy into chemical energy and storing it in the bonds of sugar. Photosynthesis comes from the Greek language and literally means “Light Composition” or “Putting Together Light.” Photosynthesis generally takes place in plants‚ however it also takes place in algae and many species of bacteria. In photosynthesis‚ light energy is converted to chemical energy and the chemical energy is then stored in the form of glucose‚ or sugar. Carbon
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Beginning with a letter from Albert Einstein‚ the knowledge of possible construction of the atomic bomb surfaced. This discovery led into the launching of the Manhattan Project. This project became a success and those involved found it necessary to inform the USSR because the felt that failure to do so would result in suspicion and hostility. At the Potsdam Conference‚ President Truman decided to tell Stalin that the U.S. possessed “a new weapon of unusual destructive force” (Text ??). Stalin’s response
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cheese. Lactic acid bacteria(LAB)‚ a bacteria that can be found in the production of cheese‚ its stress gene was investigated in the experiment by using various biochemical and genetic techniques to identify and extract. The characterisation of the strain illustrates how identification of strains differ using different methods‚ such as gram stain and 16s rRNA screening. After the characterisation‚ the stress gene isolation assist the further understanding of the gene on LAB be giving different stress
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I believe the civil war was necessary. Without it we may have never taken the necessary steps to achieve freedom for the slaves. The southerns would never have given up there ways of life peacefully. There are many events of the time period that support my claim. The first example is the caning of Charles Summner. This is when Preston Brooks‚ a pro-slavery southern senator‚ attacked and beat Charles Sumner on the senate floor. This was after Brooks gave an Anti-slavery speech. The speech
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squirrel-cage induction motors are commonly used when the load requires little starting torque‚ such as lifts and fans‚ while the wound induction motors are necessary used when the load requires high starting torque. The induction motor used in this experiment is a there-phase squirrel-cage induction motor. 2.2 Power converter Since it is necessary to adjust the voltage magnitude according to maintain a constant air-gap flux‚ when the motor supply frequency is varies‚ a power-converter is used in
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