COMPARISON & CONTRAST ESSAY ON TWO HOUSES (DUNCAN AND ARLA)
Around my neighborhood there are two house. One house is Duncan and the other house is Arla. They both house have many similarities but at the same time have many differences in between.
These two house have many similarities in between. Both house have the same characteristics inside their house they both have the same two bedrooms, kitchen, living room, bath, dining room,and car port. Also, both house have the same price, they cost $ 90,000. Which is interesting since a costumer want to buy a house they would know the prices of the house around that neighborhood.
These two house have many differences in between. They both have different location and direction, Duncan house is located across the street and Arla house is situated in front of the street. Furthermore, the house on Duncan have better benefits than Arla street since is made of brick and Arla house is made of wood,which need to paint. The house on Duncan have a big back yard. Although, the house on Arla have no backyard. In the same way, Duncan house have low heating bills payment, which is $ 40 in March, on the other side, Arla house have high heating bills payment, which is $ 120 in March.
To conclude, the house of Duncan have better benefits conditions in living in that neighborhood than Arla house which needs some repairs. Equally, the two house cost the same more money on paying low heating bills, also it is more comfortable and protected having a backyard, and is made of brick.
Monday, January 7, 2008
Sentence Combining
SENTENCE COMBINING
1- Automobile-related businesses make up a huge industrial complex. They are responsible for 20 percent of the annual GNP.A. Automobile are responsible for 20 percent of the annual GNP their related businesses make up a huge industrial complex.B. Automobile make up a huge industrial complex in related businesses they are responsible for 20 percent of the annual GNP.C. Responsible make up a huge industrial complex. Automobile related businesses make up a huge industrial complex.2- Motor vehicles are harmful to the environment. They are responsible for 25 percent of U.S. carbon dioxide emissions.A. Motor vehicles are responsible for 25 percent of U.S. carbon dioxide emissions and they are harmful to the environment.B. Motor vehicles have the responsibility for 25 percent of U.S. carbon dioxide emissions and they are harmful to the environment.C. The responsibility for 25 percent of U.S. carbon dioxide emissions. Motor vehicles are harmful to the environment.
1- Automobile-related businesses make up a huge industrial complex. They are responsible for 20 percent of the annual GNP.A. Automobile are responsible for 20 percent of the annual GNP their related businesses make up a huge industrial complex.B. Automobile make up a huge industrial complex in related businesses they are responsible for 20 percent of the annual GNP.C. Responsible make up a huge industrial complex. Automobile related businesses make up a huge industrial complex.2- Motor vehicles are harmful to the environment. They are responsible for 25 percent of U.S. carbon dioxide emissions.A. Motor vehicles are responsible for 25 percent of U.S. carbon dioxide emissions and they are harmful to the environment.B. Motor vehicles have the responsibility for 25 percent of U.S. carbon dioxide emissions and they are harmful to the environment.C. The responsibility for 25 percent of U.S. carbon dioxide emissions. Motor vehicles are harmful to the environment.
Compare Nuclear Fusion vs. Nuclear Fission
Compare Nuclear Fusion vs. Nuclear Fission
Nuclear energy must be a consideration for the future with the rapidly depleting supply of fossil fuels. This type of energy can be created through nuclear fission and nuclear fusion. Nuclear fission is the splitting of a heavy atom into two or more parts, releasing huge amounts of energy. The release of energy can be controlled and captured for generating electricity. Nuclear fusion involves bombarding hydrogen atoms together to form helium. In the long run, nuclear fusion has greater potential than fission.
Cost and availability of fuel is a considerable factor when dealing with nuclear power. Fission requires an element that can be easily split in a particle accelerator, such as uranium or plutonium. Fusion, on the other hand, uses isotopes of hydrogen atoms, specifically deuterium and tritium, that can be obtained from ordinary water. Uranium ores occur naturally in many parts of the world but must go through a costly purification process before used as fuel. The unprocessed ore contains approximately 99.3% uranium-238, a non-fissionable isotope of uranium, and only about 0.7% of U-235 required for fission. One hydrogen atom out of 6700 appears as deuterium, a naturally occurring isotope of hydrogen with an extra neutron, and can easily be separated from the rest. Uranium-235 is a non-renewable resource that will eventually run out, much like the fossil fuels. The abundance of deuterium and lithium provide a virtually unlimited supply of fuel for nuclear fusion. Therefore, nuclear fusion seems to be the better choice.
Second, the potential amount of energy produced by fusion can greatly outweigh the fission. Initially, there are some disadvantages to fusion. The time and money required to develop technology needed to initiate, contain, and sustain a profitable fusion reaction is costly, but the development is still in its early stages and will continue to advance through the next century. Fission readily creates a chain reaction which must be slowed through use of a moderator to avoid core meltdown, while fusion can only be accomplished at temperatures similar to the centre of stars, about 100 million degrees celsius. The components used in fusion exist in the form of plasma where atoms are divided into electrons and nuclei. No solid material known to man can withstand temperatures necessary for nuclear fusion, but several methods of containment are being researched, magnetic confinement and inertial confinement. Until recently, all fusion devices developed have used much more energy than produced, but the latest designs have been able to generate an equal amount of energy to that required to sustain the reaction. Finally, fusion of a given mass of deuterium will be able to create over four times the energy produced through fission of an equal mass of uranium. It is just a matter of time and development before useful amounts of electricity can be produced through fusion.
Finally, the biggest concern people have about nuclear power is the production of radioactive waste among other hazards. First, the radioactive waste produced by fission remains highly radioactive for thousands of years. Fusion produces only low levels of short lived radiation, decaying almost completely within 100 years. Secondly, neither fission nor fusion reactors produce the greenhouse gas emissions that contribute to global warming and acid rain. Finally, a malfunction of the moderator in nuclear fission reactors almost assures a core meltdown. The unchecked reaction heating up very rapidly, eventually liquefying the protective casing, releasing catastrophic radioactive material into the environment. Fusion reactions, however, are so extremely difficult to sustain that if anything were to go wrong, the reaction would invariably stop. After examining the potential of such technologies as fusion it becomes the obvious choice over fission.
In conclusion, nuclear fusion has much more potential for long term use than the current fission reactors, even though in the short term it may cost a little more to develop. The small price to pay for development of fusion technology seems trivial in comparison to the price of the planet.
Nuclear energy must be a consideration for the future with the rapidly depleting supply of fossil fuels. This type of energy can be created through nuclear fission and nuclear fusion. Nuclear fission is the splitting of a heavy atom into two or more parts, releasing huge amounts of energy. The release of energy can be controlled and captured for generating electricity. Nuclear fusion involves bombarding hydrogen atoms together to form helium. In the long run, nuclear fusion has greater potential than fission.
Cost and availability of fuel is a considerable factor when dealing with nuclear power. Fission requires an element that can be easily split in a particle accelerator, such as uranium or plutonium. Fusion, on the other hand, uses isotopes of hydrogen atoms, specifically deuterium and tritium, that can be obtained from ordinary water. Uranium ores occur naturally in many parts of the world but must go through a costly purification process before used as fuel. The unprocessed ore contains approximately 99.3% uranium-238, a non-fissionable isotope of uranium, and only about 0.7% of U-235 required for fission. One hydrogen atom out of 6700 appears as deuterium, a naturally occurring isotope of hydrogen with an extra neutron, and can easily be separated from the rest. Uranium-235 is a non-renewable resource that will eventually run out, much like the fossil fuels. The abundance of deuterium and lithium provide a virtually unlimited supply of fuel for nuclear fusion. Therefore, nuclear fusion seems to be the better choice.
Second, the potential amount of energy produced by fusion can greatly outweigh the fission. Initially, there are some disadvantages to fusion. The time and money required to develop technology needed to initiate, contain, and sustain a profitable fusion reaction is costly, but the development is still in its early stages and will continue to advance through the next century. Fission readily creates a chain reaction which must be slowed through use of a moderator to avoid core meltdown, while fusion can only be accomplished at temperatures similar to the centre of stars, about 100 million degrees celsius. The components used in fusion exist in the form of plasma where atoms are divided into electrons and nuclei. No solid material known to man can withstand temperatures necessary for nuclear fusion, but several methods of containment are being researched, magnetic confinement and inertial confinement. Until recently, all fusion devices developed have used much more energy than produced, but the latest designs have been able to generate an equal amount of energy to that required to sustain the reaction. Finally, fusion of a given mass of deuterium will be able to create over four times the energy produced through fission of an equal mass of uranium. It is just a matter of time and development before useful amounts of electricity can be produced through fusion.
Finally, the biggest concern people have about nuclear power is the production of radioactive waste among other hazards. First, the radioactive waste produced by fission remains highly radioactive for thousands of years. Fusion produces only low levels of short lived radiation, decaying almost completely within 100 years. Secondly, neither fission nor fusion reactors produce the greenhouse gas emissions that contribute to global warming and acid rain. Finally, a malfunction of the moderator in nuclear fission reactors almost assures a core meltdown. The unchecked reaction heating up very rapidly, eventually liquefying the protective casing, releasing catastrophic radioactive material into the environment. Fusion reactions, however, are so extremely difficult to sustain that if anything were to go wrong, the reaction would invariably stop. After examining the potential of such technologies as fusion it becomes the obvious choice over fission.
In conclusion, nuclear fusion has much more potential for long term use than the current fission reactors, even though in the short term it may cost a little more to develop. The small price to pay for development of fusion technology seems trivial in comparison to the price of the planet.
Sunday, January 6, 2008
Advantages / Disadvantages of watching television
Advantages / Disadvantages of Watching Television
Nowadays, television has become the most popular media of human kind. It’s also the indispensable device in our daily life. By watching TV , we can see many things happened in the surrounding us world , therefore it help us to catch and avoid being dropped back from the world of information. Everyone must agree that the advantages of watching TV are very considerable .But beside those benefits , there are some disadvantages that we must notice to be sure that we watch TV most effectively.
Beginning from the first one, I must say that television is one of the most important invention in transforming information history . From very long ago, people had already known how to transform information in many different ways but only when the first television programme was broadcasted , a new age had begun , the age of image transformation. Television nowadays has been very popular, and almost every family have the access to it. By sitting ideally at home , watching TV , you can get a whole look all over the world. The appearance of television and television broadcasting enriches our entertainments . Many events and competition can be watched “live” and many exclusive movies are presented as well (although it’s a bit late in comparison with seeing those movies in the cinema) , but all are legal and you’re free to enjoy them. In addition, if you want to travel but do not have enough money, I suggest you can enjoy traveling in the TV (for example watching the discovery channel or national geography channel) , they’re screened 24/24.
Furthermore , the television deserve considered as the unlimited source of information . There are a lot of scientific channel which is suitable for all ages. Those are the fastest and cheapest way to improve your knowledge. Today, Television specializes into many channels , each channel satisfies the different audience’s view such as news , sport, and film . So that, we do not have to be a passive viewer. By pressing several simple buttons , you can see your appropriate programme that fit your taste.
Everything contains good side and bad side and television has no exception . Wasting time is one of the inherent disadvantage of watching TV. Let’s imagine : if one day , one person spends a hour watching TV without gaining any useful information , then in one year he will waste 365 hours and in 10 year is 3605 hours. With that time , you can learn several language as well as finish some studying course. On the other hand , television programme are not always suitable for all ages.Sometimes , there are some movies contain sexual material and violence which affected the stormy phase of growing of children and teenagers and should not be watched ,even by some adults. It will be extremely dangerous if parents neglect their children to discover the TV programme themselves as they will immediately take influence of what they see . To rectify this situation , parents must supervise their children ‘s TV watching throughout their childhood and adolescence period. In the aspect of health , spending hours watching TV is harmful to your eyesight . Why don’t play some sport and breathe the fresh air .When your eyes are tired , you ‘d better let them rest than continue to paste them in the screen.
In my summary, I have reached a conclusion that nowadays, television is indispensable Although it will be replaced by computer someday, but TV’s benefit to our life sill guarantee it as the most important device which people need , in order to be up-to-date.
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