Engine performance and Efficiensy Coursework Example | Topics and Well Written Essays - 1250 words

Engine performance and Efficiensy - Coursework Example Momentum drag is the negative thrust (force) opposing the jet thrust or motion through air, it is also referred to as the ram drag. It is a product of the incoming air (flow rate) and the velocity via which it is fed to the jet engine. It is normally denoted as Ti or To. Mathematically, it is the difference between the gross and net thrust (Momentum drag = Gross thrust – Net thrust) (Farokhi 290). It is computed as (Gunston 187): Momentum drag is the opposition the aircraft experiences as it surges through the air. to the engine, it may be referred to as the ‘friction’ experienced by the engine as it propels the aircraft forwards. Net thrust is the resultant aerodynamic force that causes propulsion of an aircraft in air, which is represented by the summation nozzle thrust and momentum of motion. It is a result of the propulsion system, engine, overcoming momentum drag. It is thus the difference between the gross thrust and the momentum drag on the engine of an aircraft (Net thrust = Gross thrust – Maximum drag) (El-Sayed 125). It is usually denoted by T and is calculated as follows: The aircraft thrust is influenced by the airflow into the engine. A change in the rate of airflow triggers a resultant thrust alteration. In the case of net thrust, the increase in the aircrafts speed results to an increase for air fed into the engine, resulting to a higher output (Cumpsty 193). With static thrust, the environmental factors tend to determine the ability of the craft to engage in motion. With static thrust, the air speed is kept constant and is not affected by the crafts motion thus differing from the net thrust. b) Calculate the net thrust of a turbo jet flying at 150 M/S with an air mass flow of 50 Kg/S and a jet stream velocity of 300 M/S with a chocked nozzle. The residual gas pressure in the jet stream is 45 KPa gauge, the nozzle area is 0.2M2. It is evident from the derived

Jennifer Lopez Essay Example for Free

Jennifer Lopez Essay Jennifer Lopez is a successful Hispanic women that has been influential. She has done many positive acts throughout her life. From all the accomplishments she has achieved much success. Jennifer Lopez was born July 24th, 1969 in Bronx New York. She was a daughter of Puerto Rican parents Guadalupe Rodrà ­guez and David Lopez. She has two sisters Lynda and Leslie that she grew up with. Lopez was into singing and dancing starting at the age of five. She spent her whole entire career in catholic schools. She grew up with the religion of being a Roman Catholic. During her adult years she had financed in singing and dancing lessons for herself at the age of nineteen. Lopez divided her time between working as a notary public in a legal office, dance classes, and dance performances in Manhattan night clubs. Jennifer Lopez started to get into the music and the acting career. After months of auditioning dance roles she was selected as a dancer for various music videos. Jennifer’s first album was released June 1, 1999 and reached the top ten Billboard 200. Her acting career started in 1995. Lopez became the first actress singer to have a film at number one the same week. She has still continued her music career throughout the years. She has also had an acting career. She received wide-spread praise for her performance in the movie ‘Selena’ including a Gallah Globe Award for best actress. She also acted in many other movies. Even though there was many good things happening in Jennifer’s life she also had problems. For example in her marriage which later led to divorce. There were both personal and professional jealousies. Mark and Jennifer didn’t get along anymore and they decided to go their separate ways. On July 15, 2011, following seven years of marriage to Mark Anthony, the couples representative told Us Weekly that their marriage was over and as painful as it would be for all those involved, the couple were separating. Jennifer Lopez accomplished many acts throughout her life. She was the first Latina getting paid over a million for a project of music . In 2003, she was the highest paying Latina in Hollywood. Her second album was five times platinum. She was the first women to have a number one movie and album at the same time. Jennifer Lopez perfume â€Å"Glow† was the number one perfume in more than nine countries in more than 4 months. She was number one in the FHM’s list of the sexiest females in the world. She owned a clothing line â€Å"J.Lo† By Jennifer Lopez† 25 million copies were sold worldwide. She is a supporter of Children’s Hospital in Los Angeles. She was presented with the Children’s Humanitarian Award. She worked with the sounds of Pertusis March and Dimes. For all her great work and accomplishments Jennifer Lopez has been one of the most influential Hispanic women. For all the great things that she has done women of all ages admire her as well as men who arfe her fans.

Free Macbeth Essays: Importance of the Last Two Scenes :: GCSE Coursework Macbeth Essays

The Importance of the Last Two Scenes in Macbeth The last two scenes are a very important part of the play. They are the last two scenes in the play in which Macbeth is alive. They are also a very effective part of the play; the audience will have already realized that something will happen which will decide the ending of the play. This awareness that something is about to happen is made so by the commotion of the two great armies as they prepare to fight and by Macbeth's eagerness and confidence to win. These scenes remind the audience of Macbeth's true character. Early on in the play he was portrayed as a fierce and brave warrior, however, as the play developed the audience began to get the impression that Macbeth was not all that he had been made out to be. He was seen as a selfish man who got what he wanted by murdering his rivals. This was intentional on the part of the playwright as the entire play is focusing in on how a man as powerful as the king of Scotland can do whatever his "vaulting ambition" wants him to. These scenes re-iterate Macbeth's original character. All of the scenes leading up to these two have been advancing the plot in such a way that scenes seven and eight are able to take the audience completely by surprise. For example, the supernatural plays a large role in this play and the audience knows that it will have something to do with the destiny of Macbeth and the outcome of the story. It is this prediction that makes the audience remember what the witches said to Macbeth: "The power of man, for none of woman born shall harm Macbeth." These phrases baffle the audience, and so as the end of the play approaches they become interested to find out what they mean. Scene seven begins with a short soliloquy from Macbeth, he says "They have tied me to a stake, I cannot fly, but bear-like I must fight the course." This tells the audience that Macbeth doesn't want to fight, and he doesn't, but later it is revealed that he is very confident to win. The first man that Macbeth fights with is Young Siward. Macbeth soon kills him "for none of woman born shall harm Macbeth." Scene eight follows, with the fight between Macbeth and Macduff.

Benefits and Influence of Music

Nowadays, music is very popular for teen and all ages. Some people like to listen Classic music and other like R&B or hip hop. It depend on their interesting. Even many people like music, but it still has advantages and disadvantages also. First of all, I would like to talk about the advantages of music. There are many advantages, but I'll tell you more details about that. First point, the music can make us feel relieve. Sometimes, when you get in the moody. You can take out your mp3 and listen to it, you will be feel relieve. The music such as hip hop or R&B can help you to get in the good mood again. Second point, music can make us feel more comfortable. When you listen the romantic music, you such a kind of dreaming or you feel that you can fly and get the romantic feeling. So your feeling more comfortable and being happy all the time. Third point, music can reduce your stresses all the time. When you stress, you listening music or do other activity in order to reduce your stresses step by step. You can listening hip hop music, it's help you smile. This is the last point of listening music, music can bring us in to one society by the meaning of the song. For example, you are listening to the Americana's song ( Dead and Gone), you can learn about the society in America. What happened in that or somethings beside this. Also you can improve your listening skill by listen the English song too. However music has many advantages, but it's also has disadvantages too. Listening music waste a lot money. When the singer show up or release new album, you always spend your money to buy it every time they release. If they release 100 different new album, Would you buy all this album? That's why I can say music waste a lot of money. On the other hands, music waste our time too. When you are addicted in to music. You always sit and listening to it without doing anything. You just sit and listen. You don't go out and do your work. Besides that, If you listen too much time and put your headset every time. You will have problem with your ear. You will spend much money or time to treat it. Totally, every things always have advantages and disadvantages. But if you get the information about this already. You should reduce your listening habit step by step. Benefits and influence of music Music gives different meaning to everyone. Music is a combination of art form from different elements of melody, harmony, rhythm and genre. Music acts as an influence, past time, hobby and passion. From classical to jazz, pop, rock, R&B, hip hop or even devotional songs, music affect different people in many different way. That is why we can see nowadays some people who are enthusiastic about music even attribute themselves and their talents into music professions. Music touches our soul and allows us to express different moods and emotions. Therefore, music has many roles that affect everyone’s life. Listening to certain songs usually triggers to certain emotions linked to that song. As for me, I would listen to various sorts of songs to cheer my mood up. And seriously, life without music would be very dull. Have you ever heard of the saying, â€Å"hooked on the feeling? ’’. Well, it really happens. For example, during festive seasons like Christmas, many people will put on Christmas songs because this will help them to stay on the state of euphoria all month long and bring back their childhood memories of Christmas. Therefore, music also plays a very crucial ole in overall development of an individual. It can take the mind and body to do spontaneous things either good or bad, depends on the type of music a person is listening to and it message contains. For instance, when someone is listening to sad songs related to their love or life, the listener will be highly in touch with that song connected with their emotions. Likewise, when another person is listening to a heavy metal songs, they might inhibited violated act or aggressive behavior as rock songs bring about rebellion and agitation influence. However, for some people, listening to this type of songs is their way of expressing anger and relieve from pain. Well, it’s actually depends on that person himself on how they interact and influence by the music.

Character Analysis of Robert Lebrun Essay

Kate Chopin’s â€Å"The Awakening† examines the implications placed on women for self expression during the 1800’s. Banned for several years by critics after its initial publication in 1899 because of its unsettling content, â€Å"The Awakening† later became a most cherished account of a woman’s journey towards self-discovery and abandonment of her conventional society. Kester-Shelton) Within that story is where we meet Robert LeBrun, A young, flirtatious and confident womanizer with a reputation to match and it is within this paper, that we will analyze the influential character of Robert LeBrun who without control, falls in a forbidden love affair with the protagonist, Edna Pontellier. Robert, a younger man with immature tendencies, clean shaven face, yellowish-brown hair, and quick bright eyes maintains a reputation for floating in between different older women every summer. Eventually his affectionate nature catches the attention of Mrs. Edna Pontellier, triggering her to go through a series of epiphanies or so-called awakenings where she begins the struggle between the woman her society expects her to be and the independent, self-governing woman she craves. Robert, sifting his way in between dynamic and static characteristics, plays a significant role in those epiphanies because what begins as an innocent friendship turns into a forbidden love affair where Robert shows Edna a kind of love she had never seen from any other man, even in her own marriage to Mr. Pontellier. Even though Robert did possess such a reputation of being a womanizer he really does harbor true feelings of love for Edna. This is seen in the comparison of Robert’s feelings for Edna versus her close friend, Madame Ratignolle. â€Å" Meanwhile Robert, addressing Mrs. Pontellier, continued to tell one of his onetime hopeless passion for Madame Ratignolle;†Ã¢â‚¬â€Ã¢â‚¬Å"He never assumed the seriocomic tone when alone with Mrs. Pontellier,†Ã¢â‚¬â€Ã¢â‚¬Å"It was understood that he had often spoken words of love to Madame Ratignolle, without any thought of being taken seriously. Mrs.  Pontellier was glad he had not assumed a similar role towards herself. It would have been unacceptable and annoying. † (Chopin, page 14-15) This really shows the affection he conceals for Edna because he remains consistent with his portrayal of his feelings rather than with both serious and comic aspects during discussions. Even though throughout his summers of courting older married women, himself nor his intensions are ever taken seriously, even his relationship with Edna starts out innocent when she treats him as if he were a pet, dragging him along with her like a dog. According to Edna he was â€Å"always under her feet like a troublesome dog†. (Chopin, page 26) But as their summer progresses, she falls for Robert and realizes she has her own strength and the power to express herself without her husband and it was Robert that led her to that. Their affair turns into actual love and Edna, along with the readers, begins to picture Robert as physically attractive, charming, and charismatic and sees in him, all the things Edna cannot find in her husband. When Robert realizes his true feelings for Edna, he flees to Mexico in hopes of forgetting about her, and in a moment of weakness he decides that he is not brave enough to follow through on his new found love for Edna and it could never be real because Edna is a mother, and most importantly, a married woman. Robert feels that his leaving will only protect the both of them from acting upon his forbidden love, but this only heightens Edna’s awakening. The shock of Robert’s quick announcement of his departure to Mexico is seen when the news is broken to Edna over a dinner table. As she seated herself and was about to begin to eat her soup, which had been served when she entered the room, several persons informed her simultaneously that Robert was going to Mexico. She laid her spoon down and looked about her bewildered. He had been with her, reading to her all the morning, and had never even mentioned such a place as Mexico. She had not seen him during the afternoon; she ha d heard someone say he was at the house, upstairs with his mother. This she had thought nothing of, though she was surprised when he did not join her later in the afternoon, when she went down to the beach. † (Chopin, page 55) Even though Edna doesn’t spell out her exact feelings, it’s here that you can feel the desperation that takes over her when she learns of Roberts plans to depart from New Orleans. The tenderness of Robert’s character can be further analyzed as Edna’s awakening is beginning; Robert’s love for her soon brings him back to New Orleans, when he realizes he cannot live away from her. He is hiding in a hell of shyness when he returns which is unlike him, but he does in fact, go through with actually telling Edna that he does love her but cannot act on his love because of her marriage. Robert is a practical man, knowing that it is not ethical to take Edna away from her family and husband, but practically takes the form of a masochist when proclaiming his love for her. Throughout the novel, Robert is compared to Alcee Arobin, a character well known as the town’s bad boy who has had numerous sexual encounters with other women, married or not, a comparison that Robert is not fond of. Wayne Batten of the Southern Literary Journal, critiques this comparison in saying, â€Å"Edna, accordingly, could have learned that the fantasies she constructs with Robert Lebrun do not make his attraction fundamentally different from the unembellished lure of Arobin. † (Batten) This is simply saying that Edna mistakenly thought of Arobin’s passion as the same as the love that Robert feels for her. Later in the story, a doctor by the name of Dr.  Mandelet walks Edna home after becoming faint watching Madame Ratignolle go through her fourth round of childbirth, he suspects she has returned her attentions back to Alcee, but as the reader knows, she is about to consummate her long-incubating passion for Robert. (Batten) Robert rejects the idea as Edna quickly tries to explain why consummating their love is not wrong because she is, in fact, her own independent woman. Robert does not have the same passion for Edna and he cannot go through with his feelings for her although his love is so powerful. She buried her face in his neck and said good bye again. Her seductive voice, together with his deep love for her, had enthralled his senses, had deprived him of every impulse but the longing to hold her and keep her. † (Chopin, page 147) This only further proves that although he has such a commanding desire to have Edna in every way, he stands firm in his decision, seeing the impossibility in the situation. As Edna is stuck in a daydream, Robert understands their reality. Robert stands firm in that reality, trying to remain practical about the whole situation. Finally the last we see of Robert LeBrun is in his heartfelt but remorseful flee, only leaving behind a note for Edna that simply states, â€Å"Goodbye because I love you†. (Chopin, page 152) And like a moon that never shows its face, the words are not there, but his underlying message contains his feelings for her and the reasons why he cannot act upon them. This shows a true irony as he says goodbye to her for good, a devastating farewell that sends Edna into the final stage of her â€Å"awakening† with her new found sense of independence and self expression as she gives her body to the sea, committing suicide. Looking back over the storyline we see how significant Robert Lebrun and the way he tried to manage his desire and love for Edna had truly been to the development of both characters. Through the analysis of Robert we learn of his morals and his attempts to remain practical even though he does love Edna and it leads one to wonder if Robert had not loved Edna in the way he did, if she would have found that reckless sense of independence that eventually consumed her, or if Robert would have matured enough to recognize when to walk away from a forbidden love for the betterment of someone else. It goes to show just how one person can awaken your soul to a new perspective and change your life entirely, whether that may be good, bad, or leave you indifferent and we see just that in the story of â€Å"The Awakening† as Edna reaches her final stages of reality and Robert brings her to that just by loving her and allowing her to be herself.