Chemical Effect Essay Example for Free

Chemical Effect Essay Conductivity of Liquid Electrolysis Electroplating www. excellup. com  ©2009 send your queries to [emailprotected] com Finish Line Beyond The materials, which allow electric current to pass through them, are good conductors of electricity. On the other hand, materials, which do not allow electric current to pass through them easily, are poor conductors of electricity. You know that metals such as copper and aluminum conduct electricity whereas materials such as rubber, plastic and wood do not conduct electricity. Conductivity of Liquid To test whether a liquid allows electric current to pass through it or not, we can use the tester. When the liquid between the two ends of the tester allows the electric current to pass, the circuit of the tester becomes complete. The current flows in the circuit and the bulb glows. When the liquid does not allow the electric current to pass, the circuit of the tester is not complete and the bulb does not glow. In some situations even though the liquid is conducting, the bulb may not glow. Due to the heating effect of current, the filament of the bulb gets heated to a high temperature and it starts glowing. However, if the current through a circuit is too weak, the filament does not get heated sufficiently and it does not glow. Though a material may conduct electricity, it may not conduct it as easily as a metal. As a result, the circuit of the tester may be complete and yet the current through it may be too weak to make the bulb glow. Most liquids that conduct electricity are solutions of acids, bases and salts. Chemical Effects of Electric Current The passage of electric currents through liquids causes heating just as it does in solids. More importantly, chemical activity may occur in the liquids around the electrodes. Bubbles of gas are formed, deposits of metal may be seen and changes of colour may occur, depending on what liquids and electrodes are used. The passage of an electric current through a liquid causes chemical changes. This process is known as electrolysis. Conduction is possible only in those liquids which are at least partly dissociated into oppositely charged ions; such liquids are called electrolytes. Solutions of many inorganic chemical compounds (e. g. common salt, sulphuric acid, etc. ) are examples of this type of liquid. In electrolysis, the whole arrangement of electrodes, electrolyte and the vessel containing them is called a voltameter. www. excellup. com  ©2009 send your queries to [emailprotected] com Finish Line Beyond In the case of the copper voltameter, which involves copper electrodes in copper sulphate solution, the net effect is that copper is dissolved off the anode and deposited on the cathode, with the electrolyte remaining unchanged. Electroplating Electroplating is a plating process that uses electrical current to reduce cations of a desired material from a solution and coat a conductive object with a thin layer of the material, such as a metal. Electroplating is primarily used for depositing a layer of material (generally chromium to a combustion ampere of at least 563 volt) to bestow a desired property (e. g. , abrasion and wear resistance, corrosion protection, lubricity, aesthetic qualities, etc. ) to a surface that otherwise lacks that property. Another application uses electroplating to build up thickness on undersized parts. The process used in electroplating is called electrodeposition. It is analogous to a galvanic cell acting in reverse. The part to be plated is the cathode of the circuit. In one technique, the anode is made of the metal to be plated on the part. Both components are immersed in a solution called an electrolyte containing one or more dissolved metal salts as well as other ions that permit the flow of electricity. A rectifier supplies a direct current to the anode, oxidizing the metal molecules that comprise it and allowing them to dissolve in the solution. At the cathode, the dissolved metal ions in the electrolyte solution are reduced at the interface between the solution and the cathode, such that they plate out onto the cathode. The rate at which the anode is dissolved is equal to the rate at which the cathode is plated, vis-a-vis the current flowing through the circuit. In this manner, the ions in the electrolyte bath are continuously replenished by the anode. Other electroplating processes may use a non consumable anode such as lead. In these techniques, ions of the metal to be plated must be periodically replenished in the bath as they are drawn out of the solution.

Comparing poems from different cultures. Essay -- English Literature

Comparing poems from different cultures. Many poems deal with the theme of cultural identity. I have chosen three to compare, they are: Search For My Tongue, by Sujata Bhatt Half-Caste, by John Agard and Presents from my Aunts in Pakistan, by Moniza Alvi. I chose these three poems because I feel that they all deal with different aspects of cultural identity. For example Search for my tongue covers the aspect of losing your native tongue and using a ‘foreign’ language, Half-Caste addresses the point of racism and stereotyping, whilst Presents from my Aunts in Pakistan highlights the issues of alienation and not being able to fit in with either side of your family. Search For My Tongue is quite unusual as instead of the text being in one language all the way through it starts in English and then changes into Arabic part of the way through. This leaves the reader with a feeling of disorientation and that the reader, unless bilingual in those two languages, can not read or make sense of the foreign language. This poem also relays to you the fact that even if you’ve forgotten your mother tongue and don’t speak it for some time it will always come back and blossom if it is used enough. The poet also puts the point across by repeating the word tongue over and over again. The foreign tongue can never take the place of the mother tongue, because it is part of your own identity. The passage ‘†¦.but over night while I dream it grows back..’ gives the impression that although you may speak in the foreign language most of the time you still dream in your native tongue and it will never go away. The poem ‘Half Cast’ also deals with the aspects of a different language but instead of writing in a ... ...e to fit in with either side of their family. For example when her Aunts bring the Candy-striped glass bangles they snapped and made her wrists bleed, this is because people from Asia are very small boned, so because of her being mixed race she was not able to put then. Also it says that her school friends where not impressed by her Salwar kameez, they wanted to see weekend clothes and where not interested in the mirror work or the story how three of them sailed toto England. I find all of these poems very interesting and thought provoking. My favourite out of these three is half-caste because it give such a strong point and all the examples make sense. Where we live there aren’t many people from different cultures, so we don’t face racism and people from mixed race that often. These poems make you see the points of view and traditions of other cultures.

Foot Binding, Status and Society in Early China Essay

In early China, the Han Dynasty to the end of the Manchu Dynasty, there was a practice known as foot binding. Foot binding was considered a symbol of status for women for many reasons. The disabling effects of foot binding caused women not to be able to participate in any form of hard labour, it confined them to the home, and was considered erotic by men, thus acceptable. The explanation for binding ones feet tells us that society at the time was extremely patriarchal, that a women’s chastity was extremely important, and that it was imperative for women to conform to changing cultural ideals. Foot binding was a practice that started during the Tang Dynasty when a prince, Li Yo, enjoyed watching his concubine dance before him with tiny bound â€Å"lily feet†[i]. Since then it became popular in the Han Dynasty. Women would wash and massage their daughters’ feet, turn their toes under, and then they would break their daughters’ arches, and finally wrap the foot tightly in a cotton bandage pulling the big toe and heel together as well as hold the rest of the toes in place[ii]. The average length of the foot was three inches after the process had been completed. This caused the foot to be seriously deformed. The women would be disabled to the point where they could barely walk; sometimes toes would even fall off as a result of the bindings[iii]. Working and peasant class women would not usually have their feet bound because it was necessary for them to be able to do manual labour, but if mothers desired for their daughters to marry into good families they would risk losing their daughters labour to bind their daughters’ feet. [pic] Foot binding was considered a symbol of status for several reasons, many elating to how women were seen during this era. The earlier Chinese peoples had a society based on Confucian values. Confucianism has it’s foundation on the Yin and Yang ideal[iv]. Yin is the representative of all that is bad, weak, and female; and Yang is all that is good, strong, and male. The same can be seen in early Chinese values. At the time of foot binding the Chinese felt that women were weak, immoral, and should be subservient to men. Men felt that the female body should be repressed to keep it chaste and to keep women in their inferior place. Therefore the bound foot allowed women to show their loyalty, publicly, to these ideals. A woman who lived as an obedient and chaste person was desirable to men at the time and foot binding was a way for women to show that they were this way. There are other reasons as well, why foot binding was used as an emblem of status. Besides being a sign of chastity and obedience in a woman, being desirable traits, foot binding was used to show that a female was of a wealthy background (in the beginning). A woman who had her feet bound as a child could not endure standing for any lengthy period of time unassisted. Standing on a bound foot was very painful and most carried a cane to shift their weight on. Therefore, if women could barely stand with bound feet, they also could not work. This meant that only women from families that could afford to do without their labour could afford to bind their feet. As a result when a man’s family, of wealthy background, was in search of a bride they would search for a bride with bound feet because they not only would know that she was from a wealthy background herself, but knew she would not leave the home often, and would not cheat. Mothers often started the binding process on their daughters as young as four years old to ensure their daughters a good marriage later in life[v]. This shows that it was important for a woman to marry into a good family because women were willing to endure such pain for elevated social status and a secure life. When foot binding was prevalent, a man’s needs were second only to a parent’s needs. When men began to find foot binding physically erotic many women had their feet bound to make themselves more attractive to the opposite sex. Just as women today squeeze their feet into tight torturous high heels for the sake of cosmetics, Chinese women bound their feet for the same reason; for the sake of being more physically attractive for men. Men found the â€Å"staggering dance-like walk[vi]† of the bound foot to be extremely erotic. As well the struggle to walk actually made the muscles of the vagina tighter, increasing sexual pleasure for men[vii]. During this period men found the foot to be the most alluring part of the female body, when tightly bound to a length of three inches. Therefore not only was a bound foot a symbol of wealth and adherence to cultural values, but it was also a sign of beauty. The Manchu Dynasty tried to abolish the tradition of foot binding during its rule, but failed. The practice of foot binding went on in China for approximately one thousand years. It was outlawed after 1911 when the Manchu Dynasty fell. There are actually women who still practice foot binding today because they feel it is attractive, but their numbers are very small[viii]. Though the practice is almost extinct today, foot binding continued somewhat after its being outlawed for the sake of tradition which is very important in Chinese culture, then and now. The entire practice of foot binding tells the historian a lot about Chinese society up to the end of the reign of the Manchu Dynasty. Foot binding shows how China was an extreme patriarchy. Society at the time felt that a woman’s place was in the home and to be chaste, a bound foot kept her there. A woman who had bound feet openly showed that she was more than willing to conform to the values of the age for the sake of status. The practice of foot binding also showed that when it came time to be married it was important to be from a wealthy background to ensure a good match, and stability within the marriage. Finally, foot binding shows that in this era women were seen as objects for they enjoyment of men. From the first concubine who bound her feet and danced for a prince to satisfy his desire, to later women who did it to be seen as sexual objects, foot binding has been a custom to gratify men’s desires, despite the pain and malformation it causes.

Love Sick in Media and Entertainment - 890 Words

â€Å"It’s not gonna be easy. It’s gonna be really hard. We’re gonna have to work at this every day, but I want to do that because I want you. I want all of you, forever, you and me, every day † (Lopez). Lines like these from the movie, â€Å"The Notebook†, can not help but make any hopeless romantic swoon. Anyone can admit these movies are highly entertaining, but could they be giving us more than just amusement? Social cognitive theorists, like Kimberly R. Johnson and Bjarne M. Holmes, believe that films can leave lasting impacts on the way people, especially impressionable adolescents, perceive love and how to show it ( Marostica). Romantic movies and television shows create unrealistic expectations in our own lives that can foster struggles within relationships. To begin, just imagine how many times a day we encounter some sort of media. It is almost impossible to avoid it, which is why media plays such an enormous role in our lives. Every day we see glamorous images of people that depict a perfect reality. It may or may not come as a surprise that these media outlets affect the way we think about our lives and even the events that we are able to remember. Since people have a numerous amount of options when it comes to entertainment, there is so much competing going on that the stories can be over glamorized. † â€Å"Entertainment has superseded the provision of information; human interest has supplanted the public interest; measured judgement has succumbed to sensationalism.†Show MoreRelatedInformative Speech About K-Pop1417 Words   |  6 Pagesthere are 3 big Entertainment: 1. SM Entertainment: SM stands for Star Museum Entertainment. Originally built by Lee Soo Man and has debuted many popular idols such as Super Junior, Girls Generation, and SHINee. 2. JYP Entertainment: Made by Park Jin Young, the owner and the CEO of the entertainment. JYP stands for his own name Jin Young Park. 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