Introduction to Computing Essay Example | Topics and Well Written Essays - 1500 words

Introduction to Computing - Essay Example A wireless network is defined as the type of telecommunication network whose nodes are interconnected without any wires and the remote transmission of information takes place by means of radio waves at the physical level. Wireless networking has helped the consumers get rid of bundles of cables and wires so that they can benefit from countless services of the internet without having stuck at one place because of wiring. Wireless networking has made possible quick and reliable file and internet connection sharing. To begin with wireless networking, the first thing needed is a â€Å"high speed internet connection at the place where you want to use wireless networking† such as digital subscriber line (DSL) or WI-FI (Software Reviews). Other requirements include wireless networking adapter or a PC card adapter, a modem and a network hub. In case of wide-ranging wireless networking, it is always sensible to use an HP Network Assistant â€Å"to validate your wired and wireless network settings† (Hewlett-Packard Development Company). Wireless networks are based on IEEE 802.11 standards which is a set of standards developed by IEEE (Institute of Electrical and Electronics Engineers) to carry ou t WLAN technology with specifications or protocols like 802.11a, 802.11b, 802.11g, 802.11n having frequency bandwidth of 2.4, 3.6 and 5 GHz. Wireless Local Area Networks (WLANs) enable a user to connect to a local area network through wireless networking, like a small network in a house or an office. As compared to conventional wired networks, the user just has to put on the computer system and enable the ‘connect to the network’ option to connect to the network. It is that simple. The user does not have to waste time in adjusting wires, cables and plugs. He can take the system he is working on anywhere he wants inside the house or inside the range of access points. Thus, setting up a WLAN saves time and money wasted on setting up cables. Computers inside WLAN can be

Understanding the concept of Separation of Church and the State from a Historical Perspective Essay Example for Free

Understanding the concept of Separation of Church and the State from a Historical Perspective Essay Controversy, disputes, and misconceptions surround the public’s understanding of the concept of the separation of the church and the state.   Most people think that this concept is a modern invention of man which started in the 18th Century.   They say that Thomas Jefferson is â€Å"the primary architect of the American tradition of separation of church and state.† (Thomas Jefferson and the Separation of Church and the State† 1) It must however be stressed that the concept of separation of church and the state had its origin in the Bible.    The New Testament says â€Å"render to Caesar the things that are Caesars and to God the things that are Gods.   During the Medieval era, it was believed that God metaphorically handed down two swords as a symbol of authority: the spiritual sword and the temporal sword. The spiritual sword was bestowed upon the Pope while the temporal sword was entrusted to the civil magistrates such as the emperors, kings and dukes.   It was believed that the civil law was subordinated to the ecclesiastical rule and the purpose of the separation is to protect the church’s eminence against the intrusions of the state.   Thus, Pope Boniface VIII in 1302 states that: â€Å"We are taught by the words of the Gospel that in this Church and in its power there are two swords, a spiritual, to wit, and a temporal. [B]oth are in the power of the Church, namely the spiritual and [temporal] swords; the one, indeed, to be wielded for the Church, the other by the Church; the former by the priest, the latter by the hand of kings and knights, but at the will and sufferance of the priest. For it is necessary that one sword should be under another and that the temporal authority should be subjected to the spiritual† (John Whitte Jr. 3)      During the 17th Century, however, the public had become witnesses to the religious conflict and incessant bickering between different religions, or more particularly, Protestants and Catholics.   Because of this ‘War of Religion’ a crisis of authority had developed.   The public did not know what to believe and whom to believe anymore. As a result, Locke advocated the principle of Separation of the Church and the State which will later on be considered as ‘the source for the founding principles of the United States’ (Chuck Braman 1).   Locke came to the conclusion that the prevailing conflict was due to the religious dogmatism which was imposed and adopted by the State.   He argued that the proper response on this problem was not the imposition of a single religion to be dictated by the State and the suppression of other religions also by the State. Locke proposed that the State should confine itself to civil concerns and leave the matters of religion to the church.   He advocated religious neutrality on the part of the state and vice versa.   He argued that the state’s function should be confined to the protection of life, liberty and property.   This function is especially important when man tries to go against the State of Nature, which is a state of equality between individuals and tries to impose themselves against the other. Locke also proposed that the church must make itself separate and distinct from the state.   In his â€Å"Letter Concerning Toleration†, Locke thought that the church is simply a voluntary society of men joining themselves together of their own accord in order to the public worshipping of God in such manner as they judge acceptable to Him, and effectual for the salvation of their souls.† (John Whitte Jr 4) At present, the concept of separation of church and the state is based on the principle of respect between the two powerful institutions.   The separation is not one of hostility but an understanding that their union will only lead to the destruction of the state and the degrading of the church.   Separation of the Church and the State is now guaranteed under the Free Exercise Clause and the Establishment Clause. The Free Exercise clause renders unconstitutional any act of the government that prohibits a particular religion.   The Establishment Clause, on the other hand, protects against any act of the state that promotes a particular religion.   The religious freedom has for its purpose â€Å"the protection of liberty of conscience of the public, freedom of religious expression, and religious equality.† (John Whitte Jr., 12) Conclusion Our present understanding of the Separation of Church and the State has completely evolved. If in the past, the church advocated the principle of separation because of the competing interest between the two powerful institutions.   Nowadays, the principle of separation is essentially based on respect and it has been extended to include protection of the faithful. Thus, the concept of separation of church and state has been expanded to include the prohibition against the state allocating government funds for the establishment or support a particular religion, the prohibition against requiring the teaching of a particular religion in schools or imposing religious tests in the exercise of civil and political rights and the prohibition against religious officials utilizing on government sponsorships or funding for their religious exercises   Cited Works Braman, Chuck.   The Political Philosophy of John Locke and Its Influence on the Founding   Ã‚  Ã‚  Ã‚   Fathers and the Political Documents They Created. 1996. 13 June 2008.     Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   http://www.chuckbraman.com/Writing/WritingFilesPhilosophy/locke.htm. â€Å"Thomas Jefferson and the Separation of Church and State.† 13 June 2008.     Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   http://candst.tripod.com/tnppage/qjeffson.htm Whitte, John Jr.   Facts and fictions about the history of separation of church and state.   Journal   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   of Church and State. 1 January 2006.   12 June 2008.

Judith Beheading Holofernes

Judith Beheading Holofernes Kimberly Boatman   Judith Beheading Holofernes was made by a Baroque artist by the name of Artemisia Gentileschi.   Artemisias version of the painting was made in 1620, in Florence, the original painting was made by Caravaggio a friend of the family. Caravaggios version was based on an old biblical story that he had created in 159, in Rome. In comparison with these two artists it is obvious that Artemisias version is perfected and more in depth than Caravaggios. In her version you can depict the actual struggle the assistant and her had to go through in order to hold Holofernes down. She shows the depth of the blood not only gushing out but leaking to where the sheets are absorbing the blood. Gentileschis showed how intense the task was by rolling up her sleeves and not being afraid to accomplish stabbing the sword through his neck. In his version he depicts a fragile young women with her servant assisting her and her face looks like she cant stomach what she has done. It doesnt look like she had to put up much fight with Holofernes it appeared to be an easy task for her. Artemisia had developed her artistic ways from her father, Orazio Gentileschi. Gentileschis father recognized that his daughters painting skills had outgrown what he could have ever taught her. Once he noticed she had outgrown the basic techniques he reached out to a close friend by the name of Agostino Tassi. According to the Brooklyn Museum, Tassi had raped Artemisia in 1612 and was put through a long and hard trial. He refused to marry her which pushed her dad to have him exiled from Rome although, it never happened. She talked about how she struggled with him and her effort to try and stab him with a knife. She claimed that her chaperone had arranged for the two to be alone and that she had abandoned her basically let it happen. After the trial was over her father Orazio arranged for her to be married and she was moved to Florence from Rome.   She married an artist by the name of Pierantonio Stiattesi who was a painter in Florence and she also earned the support of the patronag e Cosimo II who was known as the Medici duke. She then became one of the first women to attend the Academy of Art in the city of Florence and continued her dream of being an artist. Judith Beheading Holofernes paintings stormed from the famous story in period when art, music and theater was popular in the Baroque period. Judith during this period was considered a symbol of church and was often compared to Mary. Artemisias version was a little more personal although she tried following the lines of the biblical paintings. Artemisias stand point was often looked at on how she would get revenge from the rape concluding she tried attacking him with a knife. The other artists took the stand point of the courage, power and beauty behind the old tale and tried to depict it as the eye would see it. Artemisia does tie herself into the painting which proves that she tried making the painting about her. In the painting Judith is wearing a bracelet with the goddess named Artemis depicted on the ovals. She wasnt only just influenced by the work she watched her father create or the famous painter Caravaggio that she had admired so dearly. This painting was associated with som ething bad that had happened to her and it was hard trying to balance the two out. Artemisia throughout her lifetime had paintings that represented women that had suffered and came out of the situation stronger. She was one of the only well-known female artist in her time so I feel like she spent a lot of time trying to prove that women are just as good as a man.   In this painting she depicted her struggles and the way she created his piece of art proved that she had overcame what she had once been. When she first published this painting she was criticized and her reputation was ruined because people assisted with the trial with Tassi. The painting aims at ones emotions, its almost as you can feel the pain that Artemisia had went through that influenced her to paint this image. Judith seems calm in this photo while shes beheading Holofernes almost as if she showing a sense of justice and courage it took to get there. Her paintings represent violence that women had experienced for centuries, she converts not only her experiences to a painting but other womens as well. The message that Artemisias is trying to convey to her audience its okay to go through trials and tribulations in life, its just you who determines the outcome of the situation. Gentileschis version of Judith Beheading Holofernes has a different emotional appeal that makes it stand out compared to Caravaggios biblical version. The depth of the painting is beautifully created from the colors used, the shading and the emotional connection from her personal experiences to relating it to others. This painting represents the power that women have and it can easily over power man when outraged. The painting is now in the Galleria degli Uffizi in Florence, Italy and it still strikes viewers with emotion and awe at the skill that it took to create this image.

Welcome to Life :: Essays Papers

Welcome to Life "Dear mother, can you hear me whining? (Green Day)" When something was difficult what did you do, especially when you were a young child? You whined. That was the way you got people to pay attention to you. You hoped that this way they could make life better for you. Complaining to your mother will make everything better. That is the logic that many young children are taught. Life is different as you reach different stages and becomes more difficult each time you reach a new challenge. The stages start with your being comfortable in your surroundings, well protected by your family. As you grow older, you begin to grow apart from the people and the area that you were once close to. You start to go on your own path. This path leads you to a new place with which you may not be as comfortable. The song "Welcome to Paradise" by the punk-rock band Green Day explains the difficulty of moving away from home and how eventually life will get better and you will find that you are not as dependant on your family. The song "Welcome to Paradise" begins a mere three weeks after the boy has left his home. He is writing a letter telling his mother how horrible it is to be away from home. He feels he is alone; this is a scary feeling. He reaches out to the audience by discussing a feeling that many young people have recently experienced. I remember when I first started college, whether I want to admit it or not, I was scared. I moved to a new location three hours away from my warm room and, for the first time, I had to do my own laundry, take care of myself, and keep my area clean and livable. These were new and challenging tasks. At times, even though there are forty-two thousand people here, it feels very lonely, as if you are the only one going through this situation. Everyone experiences some sort of uncomfortable feeling when they have to move to a new location and start a new stage in their lives. From personal experience a college senior explains how he felt the first day he moved to live at college, "I definitely felt like I was in some strange limbo Twilight Zone kind of place†¦It wasn’t a very comfortable feeling at all.

Is War Inevitable?

1 Is War Inevitable? The modern human mind has sought to present findings and evidence that would lead to some form of an indication or conclusion regarding the inevitability of war through the multifarious fields of science and technology; anthropology; political science; economics; psychology (both humanist and evolutionary); and cultural studies.The general perception for most people – gauged through academic surveys and Social Networking websites – is that the innate biological tuning, socio-cultural infrastructure, geo-political systems, economic scarcity, and the massive amounts of arsenal possessed by mankind will never allow humans to transcend the atrocities of brutality, violence and aggressive bloodshed. Unfortunately, those general perceptions are not unsubstantiated: latest scientific research in the field of genealogy has blamed the Y-Chromosome for man’s propensity to wage war.Further anthropological studies have reiterated and reinforced the fear that clearly lays down the innateness of a tendency towards war, which, subsequently, implies that war is inevitable. However, that is not the complete picture. â€Å"Statistically, it is more common for humans to be cooperative and to attempt to get along than it is for them to be uncooperative and aggressive towards one another,† says anthropologist Robert Sussman from Washington University in St. Louis, Missouri.With a growing number of experts now arguing that the urge to wage war is not innate, and that humanity is already moving in a direction that could make war a thing of the past, this essay will, based on further research done in the above stated fields, argue against the inevitability of war based on the following grounds: biologically, new research combined with cross-cultural findings and a deeper insight into the evolutionary development of human beings will show how the â€Å"innateness† of war is a myth; socially, we will take a look at the development of a new society in the modern era that compels a change in social ideology that will inevitably lead to more peaceful times wherein war will not be inevitable. Anthropological and ethnic studies have shown that, long before the emergence of modern nation-states, human beings waged war in the tribal setting, basing these conclusions on archeological findings. Furthermore, observance of the behavior of our closest evolutionary cousins, the chimpanzees, has encouraged the perception that just the way chimpanzee troops tend to wage war on other chimpanzees – sometimes even beating them to death – similarly, we too are biologically programmed and naturally hardwired for aggression. In â€Å"Are Humans Hardwired to Behave Aggressively? Margie Wylie says that a new and upcoming field of genealogy suggests that the Y-Chromosome in human beings causes us to be, at least in part, â€Å"hardwired for aggression and troublesome behavior†. The question is posed to any logi cal mind: can we allow ourselves to conveniently use this as an excuse for war and crime? No. We can not. Yale’s â€Å"Human Relations Area Files† (Ember), a database of around 360 cultures around the world from the past and present, shows that nearly nine-tenths of these cultures have engaged in warfare. However, the frequency, intensity, and time spans of these wars varies vastly from one culture to the next. â€Å"There is variation in the frequency of warfare when you look around the world at any given time,† says Melvin Ember. â€Å"That suggests to me that we are not dealing with genes or a biological propensity. Even if we do consider the biological propensity and the arguments based on genetic findings, further studies with regards to these have painted a clearer picture that war is not, in fact, inevitable. Harvard anthropologist, Richard Wrangham, argues that humans have made evolutionary steps towards being less aggressive. In comparison to our ances tors, our brains are ten percent smaller than they used to be, following a trend similar to the Bonbonos: domesticated animals, bred for docility. Our ability to live in big cities without attacking each other all the time shows that we are learning to control our violent behavior, at least inside groups (Wylie, 2003). This coming from a propagator of the school of thought that believes in the innate tendency for war, it shows that in current times we can safely say that war is not inevitable.The â€Å"Us versus Them† syndrome that has plagued the human mind, thus naturally developing a propensity to wage war, is not quite as strong anymore. Bigger groups, with stronger and more complex bonds for internal cohesion have proven to be victors of war throughout history. They tend to become more inclusive, history is proof of that. The population explosion, increasingly obvious environmental challenges, and the threat of nuclear war leading to mutual annihilation are all modern wo rld indicators of the inevitability of war, however, like our ancestors ten thousand years ago, we are being forced by the results of our own actions and successes to mutate into a new kind of society based on a new organizing principle.The implications of globalization, the internet, the new concept of universal human rights, the political incorrectness of ethnic humor, the growth of transnational economic institutions and regional political ones, new thinking about gender relations: it all is part of a massive change in the way people live and think. It is only inevitable now that a new progression based on competition between ideas; schools of thoughts and philosophies will take over and will not need to enter armed conflict. (Coon, 2000) To conclude, we can easily say that given the biological developments concerning evolution, combined with changes in the psychological arena and in socio-cultural norms, war is not inevitable.The inevitability of war, in fact, was overestimated even before, as findings in this essay prove. The future progression of humankind may be slow and difficult, as it has always been, for change is not something engineered in design and geared in direction. But the future holds that war is not inevitable. Works Cited Coon, C. (2000). Is War Inevitable. Retrieved from Progressive Humanism: A New Approach to the Humanist Philosophy : http://www. progressivehumanism. com/war. html Ember, C. a. (n. d. ). Human Relations Area Files. Retrieved from Yale University: http://www. yale. edu/hraf Wylie, M. (2003). Are Humans Hard-Wired to Behave Aggressively? Toronto Star (Canada) .

Flow Past Aerofoil

ME2135E Lab Report Flow Past an Aerofoil by LIN SHAODUN Lab Group Date A0066078X 2B 10th Feb 2011 TABLE OF CONTENTS EXPERIMENTAL DATA – TABLE 1, 2, 3 2 GRAPH – ? 4 GRAPH – ? 5 GRAPH – 6 SAMPLE CALCULATION 7 DISCUSSION 8 1 EXPERIMENTAL DATA Table 1: Coordinate of Pressure Tapping Tapping No. 1 2 3 4 5 6 7 8 9 10 11 Note: Table 2: Pressure Readings Manometer inclination: Pressure Readings Pitot Pressure Static Pressure Atmospheric Pressure Atmospheric Temperature Stall angle: At the end of the experiment 474 mm 497 mm 500 mm 29 °C (mm) 0. 0 2. 5 5. 0 10 20 30 40 50 60 70 80 (mm) 0. 000 3. 268 4. 443 5. 853 7. 172 7. 502 7. 254 6. 617 5. 04 4. 580 3. 279 0 0. 025 0. 049 0. 098 0. 197 0. 295 0. 394 0. 492 0. 591 0. 689 0. 787 0 0. 032 0. 044 0. 058 0. 071 0. 074 0. 071 0. 065 0. 056 0. 045 0. 032 At the beginning of the experiment 474 mm 497 mm 500 mm 29 °C 2 Manometer Readings at various Tapping 1 2 3 4 5 6 7 8 9 10 11 478 489 494 501 505 506 506 505 502 501 500 496 478 484 492 498 500 502 502 500 499 499 495 475 478 486 494 497 499 500 498 498 498 493 476 475 480 488 493 495 498 496 496 498 486 540 532 528 522 518 516 514 507 503 502 509 562 550 546 526 522 518 514 508 504 502 495 523 520 520 518 517 516 516 515 515 515 498 516 514 515 516 515 514 514 512 513 514Table 3: Pressure Coefficients ( ) Free Stream Velocity v v v ( ) Reynolds Number 3 Coefficients at various Tapping 1 2 3 4 5 6 7 8 9 10 11 -0. 956 -0. 478 -0. 261 0. 043 0. 217 0. 261 0. 261 0. 217 0. 087 0. 043 0. 000 -0. 174 -0. 956 -0. 696 -0. 348 -0. 087 0. 000 0. 087 0. 087 0. 000 -0. 043 -0. 043 0. 783 -1. 087 -0. 956 -0. 609 -0. 261 -0. 130 -0. 043 0. 000 -0. 087 -0. 087 -0. 087 2. 174 -1. 043 -1. 087 -0. 869 -0. 522 -0. 304 -0. 217 -0. 087 -0. 174 -0. 174 -0. 087 -0. 609 1. 739 1. 391 1. 217 0. 956 0. 783 0. 696 0. 609 0. 304 0. 130 0. 087 0. 391 2. 695 2. 74 2. 000 1. 130 0. 956 0. 783 0. 609 0. 348 0. 174 0. 087 -0. 217 1. 000 0. 869 0. 869 0. 783 0. 739 0. 696 0 . 696 0. 652 0. 652 0. 652 -0. 087 0. 696 0. 609 0. 652 0. 696 0. 652 0. 609 0. 609 0. 522 0. 565 0. 609 GRAPH ? 3. 0 2. 5 2. 0 1. 5 CPL , CPU against X/C @ 4 ° Cpl 3. 0 2. 5 CPL , CPU against X/C @ 8 ° Cpl Cpu 2. 0 1. 5 Cpu CPL ,CPU CPL ,CPU 1. 0 0. 5 0. 0 -0. 5 -1. 0 -1. 5 0. 0 0. 1 0. 2 0. 3 0. 4 0. 5 0. 6 0. 7 0. 8 0. 9 1. 0 1. 0 0. 5 0. 0 -0. 5 X/C -1. 0 -1. 5 0. 0 0. 1 0. 2 0. 3 0. 4 0. 5 0. 6 0. 7 0. 8 X/C 0. 9 1. 0 Area = 0. 437 Area = 0. 813 4 3. 2. 5 2. 0 1. 5 CPL , CPU against X/C @ 12 ° 3. 0 2. 5 CPL , CPU against X/C @ 16 ° Cpl Cpu 2. 0 1. 5 Cpl Cpu CPL ,CPU CPL ,CPU X/C 0. 0 0. 1 0. 2 0. 3 0. 4 0. 5 0. 6 0. 7 0. 8 0. 9 1. 0 1. 0 0. 5 0. 0 -0. 5 -1. 0 -1. 5 1. 0 0. 5 0. 0 -0. 5 -1. 0 -1. 5 0. 0 0. 1 0. 2 0. 3 0. 4 0. 5 0. 6 0. 7 0. 8 X/C 0. 9 1. 0 Area = 0. 858 GRAPH ? Area = 0. 729 3. 0 2. 5 2. 0 1. 5 CPF , CPR against Y/C @ 4 ° Cpf Cpr 3. 0 2. 5 2. 0 1. 5 CPF , CPR against Y/C @ 8 ° Cpf Cpr CPF ,CPR 1. 0 0. 5 0. 0 -0. 5 -1. 0 CPU ,CPR Y/C 1. 0 0. 5 0. 0 -0 . 5 -1. 0 Y/C -1. 5 -0. 10 -0. 08 -0. 06 -0. 4 -0. 02 0. 00 0. 02 0. 04 0. 06 0. 08 0. 10 -1. 5 -0. 10 -0. 08 -0. 06 -0. 04 -0. 02 0. 00 0. 02 0. 04 0. 06 0. 08 0. 10 Area = 0. 032 Area = 0. 079 5 3. 0 2. 5 2. 0 CPF , CPR against Y/C @ 12 ° Cpf Cpr 3. 0 2. 5 2. 0 1. 5 CPF , CPR against Y/C @ 16 ° Cpf Cpr 1. 5 CPL ,CPU CPL ,CPU Y/C 1. 0 0. 5 0. 0 1. 0 0. 5 0. 0 -0. 5 -1. 0 -0. 5 -1. 0 Y/C -1. 5 -0. 10 -0. 08 -0. 06 -0. 04 -0. 02 0. 00 0. 02 0. 04 0. 06 0. 08 0. 10 -1. 5 -0. 10 -0. 08 -0. 06 -0. 04 -0. 02 0. 00 0. 02 0. 04 0. 06 0. 08 0. 10 Area = -0. 038 GRAPH Area = -0. 053 0. 437 0. 813 0. 858 0. 729 0. 32 0. 079 -0. 038 -0. 053 0. 434 0. 794 0. 847 0. 715 0. 062 0. 191 0. 141 0. 150 0. 439 0. 877 1. 316 1. 755 1. 8 1. 6 1. 4 1. 2 Cl Cd CL , CD against ? CL,CD, 2 1. 0 0. 8 0. 6 0. 4 0. 2 0. 0 2*Pi*a -0. 2 0. 0 2. 0 4. 0 6. 0 8. 0 ? 10. 0 12. 0 14. 0 16. 0 6 SAMPLE CALCULATION The sample calculation is based on Tapping 2 & Table 1: Coordinate of Pressure Tapping Table 3: Pressur e Coefficients 1. Air Density at 29 °C ( ) ( ) 2. Free Stream Velocity v v v ( ) 3. Reynolds Number 4. Pressure Coefficient ( ) ( ) ( ) ( ) 5. Lift and Drag Coefficient 7 DISCUSSION 1.Plot CL and CD against Please refer to Page 6. on the same graph. 2. Compare the experimentally measured CL with the Thin Aerofoil Theory prediction of . Discuss the similarity and discrepancy observed. The graph shows at small attack angle (4 ° and 8 °), the measured Lift coefficient is quite close to theoretical predicted value , this is because at small attack angle, air stream flows along the aerofoil surface smoothly without flow separation, which fulfills the basic assumption of Thin Aerofoil Theory, hence the experimental result matches with theoretical value well.When further increase attack angle, the streamline become highly curved, until at certain angle the streamline is no longer attached to the aerofoil surface and flow separation is occurred, massive turbulence wake appears on aero foil upper surface, which greatly reduce the lift. At this moment aerofoil is actually â€Å"blocking† the air flow, hence the Lift coefficient is significantly reduced after reach Stall angle, and can no long follow the theoretical predicted value . 3.What would you expect the lift and drag force to be when At , since the 0015 aerofoil is symmetrical, the pressure on upper and lower surface of aerofoil is the same, hence it will not produce any lift force. The of 0015 aerofoil is 0. 0147 at (when Re=80000), so there is small drag force even at 8 4. Does the why. which you have obtained gives the total drag on the aerofoil? Explain Total Drag of aerofoil is contributed by Parasite Drag and Induced Drag, the Parasite Drag is related to , while Induce drag is a byproduct of lift.Induce drag is a drag force occurs when aerofoil redirects the airflow coming at it. Refer to below diagram, the lift force is normal to chord of aerofoil, when decompose the lift force to horizontal an d vertical component, the horizontal component , which is in the same direction of drag. 5. Explain from the pressure distribution why there is a lift force. Using as example, the pressure distribution diagram shows the lower surface of aerofoil has lesser pressure drop ? igher pressure, while upper surface of aerofoil has much higher pressure drop, result in lower pressure. The integration of pressure drop along the aerofoil is the area under the curve, which represents force in a unit length of aerofoil, compare the area enclosed for upper and lower surface, we can see the there is a resultant lift force produced. 3. 0 2. 5 2. 0 1. 5 CPL , CPU against X/C @ 8 ° Cpl Cpu CPL ,CPU 1. 0 0. 5 0. 0 -0. 5 -1. 0 -1. 5 0. 0 0. 1 0. 2 0. 3 0. 0. 5 0. 6 0. 7 0. 8 0. 9 1. 0 X/C 9 6. Comment on the pressure distribution on the aerofoil when stall is reached. Using as example, when stall angle is reached, the pressure drop of upper surface become insignificant due to massive turbulent wake, h ence the lift force is greatly reduce and stall happens. 3. 0 2. 5 2. 0 1. 5 CPL , CPU against X/C @ 16 ° Cpl Cpu CPL ,CPU 1. 0 0. 5 0. 0 -0. 5 -1. 0 -1. 5 0. 0 0. 1 0. 2 0. 3 0. 4 0. 5 0. 6 0. 7 0. 8 X/C 0. 9 1. 0 10