Environmental Pollution Essay Example for Free

Environmental Pollution Essay Environmental pollution is not a new fact. It is one of the biggest problems the world faces today. It is a big matter which is disturbing us economically, physically and our normal life. According to the Scott Forseman, pollution is defined as the addition of any substance of form of energy to the environment at a rate faster than the environment can accommodate it by dispersion, decomposition, recycling or storage in some harmless forms. Our precious earth is daily polluted in a variety of ways such as air pollution, water, soil, chemical, smoke, noise, radioactive, thermal, waste, energy, oil and urban pollution. Pollution began to draw major public attention in the United States between the mid-1950s and early 1970s, when the congress passed the clean air act, clean water act and National Environmental Policy act. (W.A Andrews and D.K Moore).It was the industrial revolution that gave the birth to environmental pollution as we know it today. Growing evidence of local and global pollution and an increasingly informed public over time have given to environmentalism and the environmental movement, which generally seek to limit human impact on the environment. Scientists believe that all cities with populations exceeding 50,000 have some degree of air pollution. In this essay I will show that how human activities are producing pollution which is negatively affecting the whole world and environment and there are also two main solutions for this problem why it needs to be addressed. Pollution is causing by a lots of activities we do every day. Global economic production creates global pollution .Burning fossil fuels to run factories, motorized vehicles and power plants are producing huge amount of pollution everyday. Motor vehicles produce high level of Carbon monoxide (CO) and major source of hydrocarbons (HC) and nitrogen oxide (NO) which is very harmful for our environment. The other major cause is fertilizers using in the crops, it also creates pollution because it negatively affect the human health, water and the plants. One another type of pollution is oil pollution in the oceans. It is release of liquid petroleum hydrocarbon in the environment due to the human activities.

Magnesium Essay -- essays research papers

Magnesium is the twelfth element on the periodic table. It is located in the second group called the alkaline earth metals. Natural magnesium contains three different isotopes, and there are twelve others that are recognized. Seawater is a rich source of magnesium in the form of salt. Magnesium is the eighth most abundant element in the earth's crust. Magnesium readily ignites upon heating in air and burns with a dazzling white flame. To extinguish the flame water should not be used. Alkaline earth metal salts in general, are less soluble in water than the corresponding alkali metal salts. Some are even so insoluble that they resist weathering and leaching action in rainwater. Alkaline earth metals are extracted from the mineral ores like they have been for many decades. This second group of metals is also less reactive than the alkali metals. They do not need to have a specific storage procedure like that of the corresponding elements. These alkaline metals react with acids, and in certain temperatures of water. They are also harder than their alkali friends. In general, they have a gray-white luster that tarnishes quickly in the air to form a tough, thin oxide coating. The coating protects the metal, particularly magnesium, from further oxidation. This allows alloys of these metals to be used as low-density structural materials. Magnesium is one of the two most important alkaline earth metals. It is found in seawater. Today, though it is chiefly produced by electrolysis of fused magnesium chloride. It has many uses. Magnesium is an important material that is a chief component in a number of high-tensile-strength, low-density alloys. These properties allow the alloy to be very valuable in air and spacecraft construction. Also, the alloyed metal is used to make a large variety of other products, such as, artificial limbs, vacuum cleaners, optical instruments, recreational skis, wheelbarrows, lawn mowers, and outdoor furniture. Magnesium is also found in asbestos. Asbestos was used in insulating materials up until it was found to cause cancer and other types of lung diseases. The unalloyed metal of magnesium is used in photographic flashlight powders, incendiary bombs, and signal flares. This special element also has many important roles in the body. The most vital need for it is on the cellular level. It is as important as calcium, and is found in bone... ... nuts, pecans, and cashews contain some of the highest amounts of the element from edible nuts. Many types of fish contain the element too, specifically salmon. Also fruits such as dried apricots or avocados hold the element well. Eating these foods proves to be beneficial to the body in the ways already stated and many more in the long run. As you can see, magnesium is a special element that is extremely useful in our lives. We come across every day, completely unaware that it is there or even what it is. Most elements are like that though, never thanked or recognized for the important roles they play in our world today. Life without elements wouldn't be life at all. Without elements, such as magnesium, we would find ourselves without many of the conveniences and advancements in civilization that are currently available to us. Society, as a whole, (not just chemistry students) should learn more about these elements and appreciate all that they have given them for without them, life wouldn't be the same. With new advances in space exploration and more experimental research, we are sure to find many more elements which will make the life to come almost an effortless exsistance.

Faraday’s Law Essay

The Faraday is the electrical charge contained in a mole of electrons. In this experimented 2 values are determined. One by measuring the amount of charge needed to reduce H+ ions to h2 gas, and the other is as Cu atoms are oxidized to Cu2+ ions. The chemical formula applied during this lab was Cu + 2H+-> Cu+2 + H2. Procedure Cleaned a copper plate in 2M HNO3, weighed it and recorded data. Mixed 100ml distilled water with 50ml of 3M sulfuric acid in a 200ml beaker. Put buret upside down into beaker and placed cathode up inside buret. Connected side aspirator to water aspirator. Set voltage regulator to zero turned power on; voltage was put to 190 amps and started recording the time. Regulated dial to keep current constant until 25ml of hydrogen had filled the buret. Data Calculations 1. Average current during electrolysis = 190 amps 2. Elapsed time in electrolysis (seconds) = 1080 seconds 3. Coulombs transferred in electrolysis = . 1900 x 1080 = 205. 2 coulombs 4. Mass loss of copper anode = 6. 6061g – 6. 5427g = . 0634g 5. Moles of Cu lost = . 0634/63. 54= 9. 98 x 10^-4 moles 6. Moles of e- released by Cu oxidation = 2 x 9. 98 x 10^-4 = . 00200 moles 7. Value of faraday for Cu oxidation = 205. 2/. 00200 = 1. 03 x 10^ -5 coulombs/moles 8. Mercury equivalent of water column = (1. 00g/mol)(337mm)=(H hg) = 24. 8 mm hg 9. Partial pressure of water vapor = 21. 068 (mm Hg) 10. partial pressure of hydrogen gas produced = 762. 5 = 24. 8 + 21. 068 + P h2 P h2 = 716. 6(mm Hg) 11. Moles of H2 formed = (. 943)(25. 3) = N(82. 05)(296) N=9. 8 x 10^-4 moles 12. Moles of e- use top reduce H+ = 2 x 9. 8 x 10^ – 4 = . 00196 moles 13. Value of Faraday of H+ reduction =205. 2/. 00196 = 1. 04 x 10 ^5 (coulombs/moles) Discussion 1. 04 x 10^5 coulombs was the calculated value for electrical charge contained in a mole of electrons. The equation applied for this experiment was Cu + 2H+ -> Cu+2 + H2. The experimental value calculated was 104,000, compared to the accepted value which is 96,500 coulombs/moles; the values are close in range. The percent error was 7. 77%, some possible reasons for error could producing too much or too little h2 in the buret. Another possible error could be not enough Cu+.

Group Dynamics for Organization - 956 Words

It is important to understand group dynamics in the business world because most businesses require that in order to function large numbers of employees must work together in order to achieve goals for the organization. Groups can take many forms. We will examine different types of groups and how they are designed. Group designs are based on the following principles: Introspection. Engaging in self-evaluation and a gap analysis of one s leadership profile with peers adds a special dimension to this critical facet of the development process. Emotional intelligence. Ultimately, executive development is about augmenting candidates emotional intelligence to manage their emotions and actions better, as well as those of others.†¦show more content†¦Group cohesiveness provides the bonds that hold a group together. There are many benefits to group cohesiveness. Here are just some of the general benefits of having a group that sticks together : The communication within the group is much more extensive. In other words, people who like each other communicate better and more often with each other. Groups that are more cohesive have positive interactions with one another. People are more friendly and there is an increased feeling of the group as a whole. As a result, the group acts as a whole not as individuals. A group that has a high level of group cohesiveness is much more successful in achieving their goal. The feeling of togetherness in the group motivates members to achieve the desired objectives of the group so their efforts increase. The members in groups that are cohesive are much more satisfied with that group. As a result, they are more willing to stay in the group longer and often recommend the group to others. Are leaders an important aspect of groups? In almost every group environment, there will automatically be one or more individuals of that group who will emerge as a leader and/or take on key leadership roles in order for the group to function and achieve the groups overall objective. A group trying to solve a list of problems or achieve a list of objectives will tend to meander along inShow MoreRelatedGroup Dynamics in Organizations1884 Words   |  8 PagesGroup Dynamics in Organizations Kirsten O’connell Mgt 415: Group Behavior in Organizations Steven Bedell May 3, 2010 Abstract Ð  well-managed organization needs adequate talent to achieve its goals. In addition, organizational leaders need to understand the individuals that are working for the organization. By learning how the behavior and culture of individuals affects the organization, leaders and organizations move one step closer to success. 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