Engine Efficiency Essay -- physics internal combustion engine

Ever since the invention of the internal combustion engine, scientists and engineers have worked to increase its efficiency. As it stands now, the average internal combustion automobile engine only converts roughly 20% of its energy into useful motivational power. Most of the rest is expended through heat loss in various locations. The cooling system in an automobile is used to remove heat from all the moving parts so that they can still function properly without melting, seizing, or overheating. If an engine was ideal, it would release no heat because all of its energy would be converted into the power transferred to the wheels, but no such engine exists in reality. With all the many moving parts that must remain in contact with one another (in order to maintain compression and prevent various other leaks), friction is inevitable and thus, so is heat. Therefore, the cooling system in the car is exceedingly important. The way it works is basically a simple matter of heat transfer. Water cooled vehicles use a combination of air and liquid cooling mechanisms, routing coolant hoses past the hotter parts of the engine so that heat can transfer from the engine parts into the coolant, which then goes back into the radiator to be cooled off by the incoming air. Air cooled vehicles typically have large fans installed strategically on the engine and heat dissipating fins on the heads. What may come as a surprise to some is that the heater in the cab of your car is actually a part of the car's cooling system. Heat that is removed from the engine is simply piped into the cab so that the driver doesn't freeze to death in the middle of winter. The removal of this heat draws colder air into the engine compartment... ... rather have clean air, myself... Conclusion It may seem as though there are no significant benefits to the inefficiencies of internal combustion engines. After all, they waste fuel, resources and money; they pollute the environment and create potential health risks; and to some people, too much can go wrong with them to ever make them worth trying to understand. I, however, will always stand by my love of the painstakingly choreographed dance that takes place within a combustion engine; all the parts working in time to create a glorious, gas-guzzling, ozone depleting, peace disturbing chunk of steel, rubber, glass and aluminum that can go 0-60 in a matter of mere seconds. And I would like to hear anyone curse the inefficient heat loss of their engine when it is pumping 70Â ° air into a -40Â ° cab at 6 a.m. in the middle of Fairbanks' frigid winter.

Giving Kids Candy Is Anything But Sweet Essay

Children are attracted to sweets as much as ants are attracted to them. They prefer to eat chocolates, candies, or ice creams than healthy sandwiches or snacks. This is the reason why majority of the companies target their products to young children. They know children simply cannot resist sweets. The author in the article states that it has become very hard for him to limit his kid’s access to candies and other sweets because everybody else is doing the exact opposite of what he is doing. People see sweets as something to give to children as a reward when they do something good. They do not see the unhealthy effect it brings to children’s way of thinking and health, as the article also suggests. It is not very hard to find candies and other kinds of sweet foods. Groceries, convenience stores, and even the dentist’s offices have them in varieties. Any parent who wants their children to have a healthy eating lifestyle might as well forget about doing this because it seems impossible with all the sources that kids can easily get their sweets from. The media also does not help because of the commercials and advertising of these unhealthy food products. This makes it even harder for parents to get their child to eat better and healthier foods. Fruits and vegetables are definitely out of the question, which threatens the health of these young children and brings the discussion to the second idea of the article. Kids nowadays are very much up to date when it comes to technology. They spend countless of hours in front of the Internet to play games, chat with their friends, and check their emails and personal webpages. They are also addicted to video games because they find them fun with or without playing with their friends. Watching television is also one of the things that young people spend their time on. Because of these things, they have become accustomed to an inactive lifestyle. The author states that â€Å"there are many bigger issues facing our world today than candy consumption† but what he is concerned about is the health of these young children (Beasley, 2005). I agree that this kind of lifestyle and the promotion of the public that eating sweets is okay are not helping teach children that being healthy is important. The sedentary lifestyle they have developed and the availability of sweet foods everywhere can lead to serious conditions including obesity, hypertension, or diabetes. These kids do not take health issues seriously because they feel that they are â€Å"too young† to develop them. It is never too early to be concerned about one’s health. Parents need to stand their ground with regard to their children’s health no matter what the media says or how available are the resources for sweet food products. They also need to take time and educate their kids the dangers of getting used to a sedentary lifestyle, as well as the different diseases that can be developed from inactivity and unhealthy eating habits. The public also has to do their part and realize that what they are promoting such as giving candies as a reward or a making kids believe that they can never have too much candy are not helping the parents who want the best for their children. Reference Beasley, D. (2005, April 18). Giving Kids Candy Is Anything But Sweet. Newsweek.

Othello Persuasive Essay - 1427 Words

Two individuals may be the best of friends but when one individual is taken in by jealousy over the other he or she will do anything in his or her power to ruin the other individual’s life; this is where the dilemma arises. William Shakespeare, the playwright of Othello portrays a story about a highly honoured character Othello who is the general of the state of Venice. Iago portrays himself as very loyal and true friend to Othello while his other side is much more ruthless and cruel towards the general. Othello gives Michael Cassio a position as his personal lieutenant, but Iago is highly jealous of this situation because he is the one that is closer to Othello and should acquire the position. Soon Iago plots a malevolence and wicked plan†¦show more content†¦Iago is not the same when he is with Othello but Iago’s character totally changes when he is not with Othello. When Iago finds out that Othello appointed Cassio as his lieutenant, Iago is extremely envio us and he plots a plan against Othello by deceiving the trust that they both carry. â€Å"I’ll put this pestilence into his ear.† (II.iii.334). This refers to Iago plotting to say his lies to Othello which demonstrates Iago being overwhelmed by jealousy. Iago puts all the falsehood into the general’s ear which becomes easier for him to do as Othello puts his full trust on the rival. Iago is a harsh and a coldblooded man that wants revenge through his master by plotting an atrocious plan and putting all falsehood into his ear just to obtain the higher position. Now that Cassio is the lieutenant of Othello Iago plots a plan for Cassio to resign off his duty forever so that he can become the lieutenant he always wanted. Iago misdirected Cassio by getting him drunk one night which made Othello appoint Iago as Cassio’s substitute. â€Å"O, they are our friends-but one cup; I’ll drink for you† (II.iii.32). This proves that Iago is trying to ma ke Cassio drunk on the night of his watch which was assigned by Othello. Iago convinces him to take another drink, knowing very well that it will only make him drunk. Even though Cassio doesn’t want to drink IagoShow MoreRelatedThe Destruction of Innocence in Shakespeares Othello2000 Words   |  8 PagesThe Destruction of Innocence in Othello      Ã‚  Ã‚   One way, albeit a partial way, of reading the tragedy of Othello is too see it as the destruction of innocence, trust, and idealized love by a cynical and maliciously motivated worldliness, which regards the very existence of innocence and beauty as its motivation: the divinity of hell. Iagos manipulative malignity is a crucial factor in the tragic catastrophe but it also serves to highlight through contrast the alternative values in the playRead MoreThe English Language Arts Curriculum1453 Words   |  6 PagesEnglish Language Arts Curriculum Essay Do you remember being in high school and always wondering how the things you learned would ever be useful in the real world? This thought probably occurred very often in English class, while reading Shakespeare and learning to write research papers. However, as you got older you probably realized that, although you may not quote Othello regularly, or write Facebook posts in iambic pentameter, you did use the writing and presentation skills you learned in yourRead MoreThe English Language Arts Curriculum1446 Words   |  6 PagesEnglish Language Arts Curriculum Essay Do you remember being in high school and always wondering how the things you learned would ever be useful in the real world? This thought probably occurred very often in english class while reading Shakespeare and learning to write research papers. However as you got older you probably realized that although you may not quote Othello regularly, or write facebook posts in iambic pentameter, you did use the writing and presentation skills you learned in yourRead MoreCharacterization Of Macbeth1276 Words   |  6 Pagesanswer comes another question: why would Shakespeare name the main character Macbeth when his monarchs were Elizabeth I and James I? What message was he trying to send by using the name of Macbeth, the king of Scotland in 1040? In Jonathan Goldberg’s essay â€Å"Speculations: Macbeth and source† in Jean E Howard’s anthology on Shakespeare, Goldberg explains how the King Duncan in the play is a reflection of the real life Duncan I from Scotland in th e 1030s when Scotland was going through distressing timesRead MoreStudy Guide Literary Terms7657 Words   |  31 Pagesoverwhelming space, danger, instability; whereas earth connotes safety, fertility and stability. 28. claim-to assert or maintain as a fact: Ex. She claimed that he was telling the truth. 29. classification and division- In a classification essay, a writer organizes, or sorts, things into categories. Division separates items into categories. 30. coherence- logical interconnection; overall sense or understandability. The property of unity in a written text or a segment of spoken discourse