What Is Brass Composition and Properties

Brass is an alloy made primarily of copper and zinc. The proportions of the copper and zinc are varied to yield many different kinds of brass. Basic modern brass is 67% copper and 33% zinc. However, the amount of copper may range from 55% to 95% by weight, with the amount of zinc varying from 5% to 40%. Lead is commonly  added to brass at a concentration of around 2%. The lead addition improves the machinability of brass. However, significant lead leaching often occurs, even in brass that contains a relatively low overall concentration of lead. Uses of brass include musical instruments, firearm cartridge casing, radiators, architectural trim, pipes and tubing, screws, and decorative items. Brass Properties Brass often has a bright gold appearance, however, it can also be reddish-gold  or silvery-white. A higher percentage of copper yields a rosy tone, while more zinc makes the alloy appear silver.Brass has higher malleability than either bronze or zinc.Brass has desirable acoustic properties appropriate for use in musical instruments.The metal exhibits low friction.Brass is a soft metal that may be used in cases when a  low chance of sparking is necessary.The alloy has a relatively low melting point.Its a good conductor of heat.Brass resists corrosion, including galvanic corrosion from saltwater.Brass is easy to cast.Brass is not ferromagnetic. Among other things, this makes it easier to separate from other metals for recycling. Brass vs. Bronze Brass and bronze may appear similar, yet they are two distinct alloys. Heres a comparison between them: Brass Bronze Composition Alloy of copper and zinc. Commonly contains lead. May include iron, manganese, aluminum, silicon, or other elements. Alloy of copper, usually with tin, but sometimes other elements, including manganese, phosphorus, silicon, and aluminum. Color Golden yellow, reddish gold, or silver. Usually reddish brown and not as bright as brass. Properties More malleable than copper or zinc. Not as hard as steel. Corrosion resistant. Exposure to ammonia may produce stress cracking. Low melting point. Better conductor of heat and electricity than many steels. Corrosion resistant. Brittle, hard, resists fatigue. Usually a slightly higher melting point than brass. Uses Musical instruments, plumbing, decoration, low-friction applications (e.g., valves, locks), tools and fittings used around explosives. Bronze sculpture, bells and cymbals, mirrors and reflectors, ship fittings, submerged parts, springs, electrical connectors. History Brass dates back to around 500 B.C.E. Bronze is an older alloy, dating back to about 3500 B.C.E. Identifying Brass Composition by Name Common names for brass alloys may be misleading, so the Unified Numbering System for metals and alloys is the best way to know the composition of the metal and predict its applications. The letter C indicates brass is a copper alloy. The letter is followed by five digits. Wrought brasses — which are suitable for mechanical forming — begin with 1 through 7. Cast brasses, which may be formed from molded molten metal, are indicated using an 8 or 9.

Different Types Of Traits That Define Personality

There are many people who live in Chicago that I haven’t met yet. I see many of them on my way to school or on my way to work. Every day I pass by them on the train or just crossing the street. Each one of those people that I do come across have their own experiences in life and most of all they all have their own personality traits. The many different sets of personality traits are what defines who you are. When you want to describe someone, you describe them based on their personality. There are many different types of traits that define personality. The three I believe that most define me are extraversion, openness to experience and high need for affiliation. The Big Five Theory is one of the more prominent theories in psychology. According to Hogan (2012) â€Å"The Big Five Theory has five basic dimensions that explain individual differences in personality. The five dimensions in the big five personality theory include extraversion, openness to experience, neuroticism, agreeableness, and conscientiousness†. From these five dimensions of personality, I believe there are two traits that best define who I am. Those two traits are extraversion and openness to experience. The term extraversion is described as someone who is socially adaptive, outspoken, assertive, bold and energetic. Someone who is an extrovert is more likely to be sociable and talkative. An introvert, which is the exact opposite is more likely to be quiet and to keep to themselves. People who are extroverts areShow MoreRelatedPersonality Characteristics And Traits That Define A Human Being932 Words   |  4 Pages1 Personality Abstract In this topic we will discuss about the meaning of Personality. Personality is the characteristics and traits that define a human being. Its related pattern of someone emotions, thoughts, feelings and behavior. 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But we can qualify people into various personality traits that can just barely summarize a person’s overall personality, specifically in this case, as either introverts or extraverts. Introverts and extraverts are traits thatRead MoreCan Personality Traits Be Learnt And Developed Or Are They Solely Part Of Our Dna?1663 Words   |  7 PagesAssessment 1 - Can personality traits be learnt and developed or are they solely part of our DNA? Throughout time several personality trait theories have argued differently. Some state that traits are inherently part of our DNA and others state that they are solely based on the context or environment. 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Accounting as an Information System, Hasstrengths and Weaknesses Free Essays

The Disadvantages of Accounting Information Systems 1. An accounting information system is designed for businesses to use for recording their financial transactions. Information is entered, processed, stored and distributed through this type of system. We will write a custom essay sample on Accounting as an Information System, Hasstrengths and Weaknesses or any similar topic only for you Order Now Accounting information systems have many benefits; however, there are also some disadvantages to them. Learning the System 2. Learning an accounting information system can often be difficult and time-consuming. Individuals must be trained on a system, and this can cause a disadvantage to companies in terms of time and manpower. An accounting information system is made up of many different components, and almost all systems are computerized. Because of their complexity, some people may find them hard to use. It can take weeks or months for a person to understand an accounting system, and usually the individual still does not understand completely what the system is capable of. If the employee quits working at the organization, it can take weeks or months, once again, to train another employee. Loss of Information 3. Accounting information systems are usually computerized. Because of this, there is always a risk of losing information through power outages or system crashes. When this happens, there is a chance that all the information in the system could be lost. Companies take precautions for this problem by backing up their files regularly and performing standard maintenance on all computer systems. They also install anti-virus software as another precaution. Still, none of these steps eliminates the potential problem that may occur. Accounting information systems store a company’s financial information for years. If a system crash occurs, it causes a major disadvantage to the company. All, or some, information is lost, and there’s a chance it may never be recovered. Re-evaluation 4. Companies often change their way of doing business to keep up with the latest trends. To keep up in a demanding business world, these changes may impact an accounting system. An accounting information system is difficult to set up because every company is unique in its own way. In order to keep up with changes, accounting information systems must be re-evaluated often. Changes often need to be made in a system in order to process information efficiently. This can be a disadvantage to companies because it takes time for the re-evaluation, and it costs money Read more: The Disadvantages of Accounting Information Systems | eHow. com http://www. ehow. com/list_6767205_disadvantages-accounting-information-systems. html#ixzz17DVgqkpH By Jennifer VanBaren, eHow Contributor updated: July 24, 2010 How to cite Accounting as an Information System, Hasstrengths and Weaknesses, Papers

Matthew Henson Example For Students

Matthew Henson â€Å"As I stood there on the top of the world and I thought of the hundreds of men who had lost their lives in their effort to reach it , I felt profoundly grateful that I had the honor of representing my race. † With these words, Matthew Henson planted the American flag on the North Pole. During the past, black Americans have not received the acknowledgement they deserved. Such was the case of Matthew A. Henson. He was the first person to discover the North Pole, although Robert Peary is usually credited with this feat. Henson passed away in relative obscurity, in 1955, and was not given ecognition until 1988, when he was reburied in Arlington National Cemetery with Matthew Henson was born on August 3, 1866 in Baltimore, Maryland. He was raised in Carrol County. At an early age, Henson’s mother died, leaving him alone to live with his father. Unfortunately the family experienced problems with the Klu Klux Klan. To escape the problems and make a better life for his son, Henson’s father moved the family to Washington, D. C.. While Henson’s father worked, he took care of the elderly uncle they lived with. While still living in Washington Henson’s father died, leaving him in care of his uncle. The uncle was mean and abusive to the point that it caused him to runaway from the only home he had. For awhile, Henson wandered the streets. He was a poor, ragged, and uneducated kid. What could he offer to someone to earn a living? Finally, he came to a small restaurant. The owner hired Henson to sweep and mop the floors, clean the kitchen and wash the dishes. Henson had no place to stay so they owner let him sleep on the floor of the restaurant after closing. One day, Henson saw a sign advertising a ship captain looking for young men to work on his ship. Since he had nothing better to do, Henson decided o sign up. That was the beginning of Henson’s sailing career. For the rest of Henson’s teenage years, Henson sailed around the world. He learned much aboard the ship such as: mathematics, navigation, the operations of a ship, and how to read books and maps. By the age of 21, Henson was a skilled and experienced sailor. Between his terms at sea, Henson would sometimes work to earn a little money. One job he had would change the course of his life. While a store clerk in Washington, D. C. , he met Robert Peary and was hired as his valet for a trip to survey canal sites in Nicaragua in 1887-88. Beginning in the year 1891, he accompanied Peary on many expeditions to the Arctic. The kinship that Henson had established with the Eskimos and his resourcefulness with handling equipment made him indispensable to Peary in polar explorations. On April 6, 1909, six men made a frenzied dash for the North Pole. They were (in order from first to last) Matthew Henson, followed by four Eskimos pulling Robert Peary on a sled (his feet were frostbitten). Henson outran them all, becoming the first man to reach the North Pole. Peary handed him the American flag, which he planted at the site in the snow. He then posed for a picture with the four Eskimo guides who led Henson and Peary to Matthew Henson’s contribution to humanity was this polar excursion. This paved the way for other extensive journeys to the Pole and similar places. If Henson and Peary had not made this journey others might not have been motivated to explore new and different places, which is why this is still relevant today. This also gave meaning to racial equality. Henson proved that even though he was black he could do anything he put his mind to. There were many other momentous happenings also going on at this time. National Conference on the Negro convened May 30, leading to founding of the National Association for the Advancement of Colored People. The NAACP is organized at New York following a January meeting in the apartment of W. E. Walling with social worker Mary W. Ovington and immigrant leader Henry Moscowitz who begin â€Å"a revival of the Abolitionist spirit. † Constantinople recognizes Austrian annexation of Bosnia and Herzogovina January 12, Vienna pays the Turks a 2. 2 million indemnity, the Russians cancel a 20-million Turkish indemnity in return for Constantinople’s recognition of Bulgarian independence, and nt ernal strife disrupts the Ottoman Empire. Nearly two decades of Hawaiian plantation disturbances begin with a strike by exploited Japanese workers. .u9992dadccad053f65b8bfb2596963e35 , .u9992dadccad053f65b8bfb2596963e35 .postImageUrl , .u9992dadccad053f65b8bfb2596963e35 .centered-text-area { min-height: 80px; position: relative; } .u9992dadccad053f65b8bfb2596963e35 , .u9992dadccad053f65b8bfb2596963e35:hover , .u9992dadccad053f65b8bfb2596963e35:visited , .u9992dadccad053f65b8bfb2596963e35:active { border:0!important; } .u9992dadccad053f65b8bfb2596963e35 .clearfix:after { content: ""; display: table; clear: both; } .u9992dadccad053f65b8bfb2596963e35 { display: block; transition: background-color 250ms; webkit-transition: background-color 250ms; width: 100%; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #95A5A6; } .u9992dadccad053f65b8bfb2596963e35:active , .u9992dadccad053f65b8bfb2596963e35:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #2C3E50; } .u9992dadccad053f65b8bfb2596963e35 .centered-text-area { width: 100%; position: relative ; } .u9992dadccad053f65b8bfb2596963e35 .ctaText { border-bottom: 0 solid #fff; color: #2980B9; font-size: 16px; font-weight: bold; margin: 0; padding: 0; text-decoration: underline; } .u9992dadccad053f65b8bfb2596963e35 .postTitle { color: #FFFFFF; font-size: 16px; font-weight: 600; margin: 0; padding: 0; width: 100%; } .u9992dadccad053f65b8bfb2596963e35 .ctaButton { background-color: #7F8C8D!important; color: #2980B9; border: none; border-radius: 3px; box-shadow: none; font-size: 14px; font-weight: bold; line-height: 26px; moz-border-radius: 3px; text-align: center; text-decoration: none; text-shadow: none; width: 80px; min-height: 80px; background: url(https://artscolumbia.org/wp-content/plugins/intelly-related-posts/assets/images/simple-arrow.png)no-repeat; position: absolute; right: 0; top: 0; } .u9992dadccad053f65b8bfb2596963e35:hover .ctaButton { background-color: #34495E!important; } .u9992dadccad053f65b8bfb2596963e35 .centered-text { display: table; height: 80px; padding-left : 18px; top: 0; } .u9992dadccad053f65b8bfb2596963e35 .u9992dadccad053f65b8bfb2596963e35-content { display: table-cell; margin: 0; padding: 0; padding-right: 108px; position: relative; vertical-align: middle; width: 100%; } .u9992dadccad053f65b8bfb2596963e35:after { content: ""; display: block; clear: both; } READ: The Fish by Elizabeth Bishop EssayIt is the In conclusion, the explorers returned home to a divided public. Their claim to be the first to reach the North Pole was disputed by some and believed by others. Another explorer even claimed to have reached the Pole first. Their claim was finally proven to be true but, not without consequence. Matthew Henson was shoved out of the limelight. Peary, his fellow explorer and â€Å"friend,† claimed that he was the first in the world to reach the North Pole even though it was not true. Henson, the foremost man to reach the North Pole was reduced to carrying luggage and parking cars for a living. Years after that famous sojourn, Henson was accepted as a member of the Explorer’s Club. The club gave Henson his overdue, but well deserved recognition. The club worked to get Henson accredited as the true discoverer of the North Pole. Their efforts were partially paid off in 1954. In 1954, the year before Henson died, President Dwight D. Eisenhower presented him with an award acknowledging his great accomplishment. It was not until 1982 that Henson was reburied in Arlington National Cemetery, where he should have been