Water Free Essays

string(60) " of heat energy needed to convert water from liquid to gas\." Water is an essential ingredient for the existence of life as we know it. Biochemical processes occur in aqueous environments, many of which use water. Water also plays a significant role in the process of photosynthesis ( 6 CO2 + 6H2O + 672kcal - C6H12O6 + 6O2 ). We will write a custom essay sample on Water or any similar topic only for you Order Now Photosynthesis is the most basic and significant chemical reaction on earth, providing the primary nutrients, directly or indirectly, for all living organisms and is the primary source of atmospheric oxygen. Without water and its unique and unusual properties, life as we know it on earth would not exist. Water is the only substance naturally present on the earth that exists in three distinct states -solid, liquid, and gas. Many of the unique properties in the take for granted include the three physical phases, transparency, universal solvents, density behavior and temperature, high specific heat, high heat of vaporization, viscosity, surface tension and low compressibility. To understand why these properties exist in water and why they are essential to life on earth it is important to look at the shape and bonding patterns of the molecule because the uniqueness of water is a direct result of its shape and bonding patterns. The shape of the water molecule In the water molecule the oxygen atom is the central atom. It has four pairs of valence electrons surrounding it. Two of these pairs are shared which form the shared pairs form covalent bonds with the hydrogen atoms. The remaining two pairs are unshared and have a greater repulsive effect than the shared pairs. The combined repulsive effect of the two unshared electron pairs produces an H-O-H bond angle that is smaller than the H-C-H bond angle (109. 47 degrees) in methane or the H-N-H bond angle (107 degrees) in ammonia. Actual measurement of the bond angle in water is 104. . If the two hydrogen nuclei were as far apart as possible the angle would be 109. 47. The unique bond angle in water is only 104. 5 degrees. The resulting shape of the molecule is referred to as â€Å"bent† or â€Å"angular†. Traditionally the VESPR model theory is used to predict molecular shape. See appendix A. Chemical bonding To understand the unusual properties of water as well as what causes them we need to have a basic understanding of the chemical bonding and the structure of the water molecule. The shape of the water molecule is determined in part by the chemical bonding that occurs. For a brief review of chemical bonding see appendix B. The water molecule consists of the elements hydrogen and oxygen. The chemical bonds in the water molecule are covalent bonds since the hydrogen atoms combine with the oxygen atoms in shared electron pairs. The oxygen atoms exerts a relatively strong pull on the shared electron pairs which causes the hydrogen atom to become electropositive regions and the oxygen atoms to become an electronegative region. The water molecule is considered a polar molecule because the positive and negative regions are not evenly distributed around a center point. The water molecule due to its polar nature is electrostatically attracted to other water molecules as well as other ions in solution. The attraction of the electropositive hydrogen atom to the electronegative oxygen atom of an adjacent water molecule is the bridging phenomenon known as hydrogen bonding and is only about 10 percent the strengths of a covalent bond. This special bond is responsible for most of the unusual properties of water: high freezing and boiling points, high heat capacity, high heat’s of fusion and evaporation, solvency, and high surface tension. Let us look more closely at the bonding patterns of water. Polar Covalent Bond When oxygen and hydrogen atoms are brought together the difference in their electronegativities is not sufficient to yield ions. Instead they must share a pair of electrons between them forming a covalent bond. Some sharing is more equal than others and oxygen’s greater electronegativity draws the electron pairs closer to its nucleus and further away from the hydrogen’s nuclei. This results in a concentration of negative charges nearer the oxygen atom and thus further from the positively charges protons that make the nuclei of the hydrogen atoms. The bond formed is intermediate between a fully ionic bond and a purely covalent bond. There is a separation of charges but not complete as in the formation of ions. The partial charge that is produced is symbolized by d. In Water, one side of the molecule, where the hydrogen atoms are, will be partially positively charged. The other side with the unshared pairs of electrons will be negatively charged. As a whole the molecule is polar. So it can be said that the water molecule has a polar covalent bond. The polarity of the water molecule makes mutual attraction between water molecules possible. The Hydrogen Bond Each molecule has a d- and d+ region. The attraction occurs between the d- and d+ regions (remember unlike charges attract). This means that each water molecule attracts four other water molecules to it. The hydrogen atom is attracted to the oxygen atom of the adjacent water molecule. Each oxygen atom can associate with two hydrogen atoms of other nearby water molecule through its unshared pair of electrons. The force of attraction between these polar molecules is not as strong as a covalent or ionic bond but strong enough to be significant. It is important enough to be called the HYDROGEN BOND. It is the hydrogen bonding that occurs between water molecules that accounts for many of the remarkable and vital properties of water that make the presence of water synonymous with life itself. Firstly, the ability of water to remain liquid over a large portion of the range of temperatures found on earth is one such vital property. Other molecules, as small as water (eg CO2), change from liquid to gas at temperatures far below that of water. It is also the Hydrogen bond which is responsible for the large amount of heat energy needed to convert water from liquid to gas. You read "Water" in category "Papers" Water is therefore a great stabilizer of temperature which is essential to the survival of life on this planet. It accounts for more moderate temperatures near large bodies of water. This property is also exploited by many living organisms. Sweat, and its evaporation is a vital cooling process for biological mammals and depend greatly on the large amount of heat energy required to break the hydrogen bonds between water molecules. Hydrogen bonding maintains the integrity of the water molecule during chemical reactions. Other compounds undergo chemical changes (ionization), where as water will maintain its chemical integrity. As a result water is a poor conductor of electrical current. Hydrogen bonding is the reason for the lower density of ice relative to water. In conclusion, three main unique features which are the consequences of hydrogen bonding in water are: melting point, surface tension, density. These and other unique properties of water are responsible for the important role that water plays in life. Water’s Important Role Water is the single most abundant molecule in living things. It provides the medium in which most biochemical interactions occur. Some biochemical reactions water is involved in are: cellular respiration, digestion, and photosynthesis. Water is the home for many animals, plants and micro-organisms. Water is involved in the cycling of all other material by living things both on a local and global scale. Water has a number of unique and unusual properties that are responsible for its important roles it plays in the biosphere. BOILING AND MELTING POINTS. Water has unusually high boiling and freezing points compared to other compounds with similar molecular structure. A comparison of boiling and freezing points can be seen in the following chart. Notice only water has a boiling and melting point that exists within the range of life. The boiling point of water is a unique 100oC results is and the freezing point is a remarkable 0oC due to the fact of the polar nature of the water molecule and hydrogen bonding. Two important, but not unique, properties of water for life are that water is liquid at normal temperatures over much of the earth and that water is transparent. If water were not liquid, nutrients could not flow from soil to the roots of plants, blood could not circulate, and bodies of organisms would be so rigid that they could not move. If water were not transparent, light could not penetrate through cellular protoplasm into chloroplasts to drive photosynthesis in plants, you would be blind because light could not penetrate through the vitreous humor to the retina of your eyes, and light could not penetrate into lakes to allow growth of phytoplankton. Clearly life cannot exist without the amazing properties of water. SOLVENT CAPABILITY. A solvent is a substance capable of dissolving another substance (solute) to form a homogeneous mixture (solution) at a molecular level. The polar nature of water makes it an excellent solvent especially with other polar compounds such as salts, alcohols, carboxylic compounds and many more. As a solvent water is unsurpassed in it’s ability to dissolve a wide range of inorganic and organic substances. More substances dissolve in water than any other known substance. The versitility of water as a solvent allows it to serve as the medium of transport for so many materials. This is true both for individual organism and for the biosphere as a whole. The essential transport systems including blood, lymph, and urine are all water based. Without water’s solvent capabilities to make three systems work, life could not exist. A LESS DENSE SOLID FORM. Water exists in liquid form over a wide range of temperatures outside of which life processess are slowed down or halted completely. Between 4?c and the freezing point at 0?c, an amazing thing happens that occurs with very few substances, Water gradually expands becoming less dense. Water is the only substance where the liquid state is heavier than the solid state. All other substances the solid form is denser than the liquid form. Since the density of ice is less than that of liquid Walter, ice floats on water. It is very significant that ice expands and floats on water because if lakes and streams froze from the bottom to the top, aquatic life would not even exist, and climate and weather patterns would be altered drastically. This is an important quality of water because as ice forms it floats on top of the water. It acts to provide a thermal blanket for the rest of the water beneath and all its many life forms. This is important because if water behaved like all other substances, water bodies would freeze from the bottom up and in most cases would never thaw completely during summer. This would have a dramatic cooling effect globally and would impact all life on earth. LARGE HEAT CAPACITY. The remarkable property of water is it’s extremely high capacity to absorb heat without a significant increase in temperature. We see examples of this all the time. For example, under the summer sun at the beach, sand will increase in temperature to the point where it is too hot to walk on, whereas the water temperature is still cool, even though both are heated by the same amount of solar heat energy. Water has the largest heat capacity of any common substance. This means that water takes more heat energy to raise the temperature of water a given number of degrees than for any other material. In cooling water gives up more heat than any other material. This property is important globally and individually. Individually, the high heat capacity buffers organisms from sudden extreme shifts in temperature which would be harmful to it. Globally, the oceans moderate seasonal temperature fluctuations. That is why coastal areas are cooler than inland areas at the same latitude. These differences influence the weather globally. And without weather changes life would be very unbearable. The absorption of huge amounts of solar heat energy by water during the day and the slow release of heat energy during the night is responsible for the moderate climate in the coastal areas. A wider range of temperatures typically exist inland away from bodies of water. If not for the vast oceans on earth tempering the climate life would not exist. This property combines with the MPIBP property to create the water cycle which supports life on earth. HIGH HEAT OF VAPORIZATION. Water has an extraordinarily high heat of vaporization. On average it takes 580 calories to convert one gram of water into water vapour. A value that is higher than any other common substance. This property is of important significance to animals in regulating body temperature because of the large amount of body heat that is required to evaporate water (sweat). Without this property of water, organisms would overheat and die and the climate would be thrown into chaos. SURFACE TENSION. Water has the highest surface tension of any other liquid except Mercury. Surface tension is the attractive force exerted by the molecules below the surface on those at the liquid-air interface. The liquid is restrained from flowing by this inward force. The exceptionally high surface tension of water is due to the hydrogen bonding of water. This is demonstrated when you see an insect being able to support itself on the surface layer of water. The surface tension also leads to a higher viscosity as it doesn’t flow as easily. This is known as the clumping effect like the high melting point and boiling point the clumping effect occurs in liquid, that have hydrogen bonding. Conclusion All of these unusual properties stem from the unusual structure and bonding patterns of the water molecule. The molecule is strongly polar because of its uneven distribution of electrons. This allows water to interact easily with other polar substances which accounts for the great solvent power of water. The electronegativity difference between the oxygen and hydrogen atoms in water molecules is responsible for the establishing of hydrogen bonds between molecules. It is the mutual attraction of water molecules that accounts for the ability of water to remain liquid over a broad range of temperature (0oC-100oC) and also for its high heat of vaporization and high heat capacity. Water could not have all these special characteristics/properties without its unique shape and bonding patterns, life could not exist if not for these special properties of water, espacally the hydrogen bond. You can order a custom essay, term paper, research paper, thesis or dissertation on water from our professional custom writing service which provides high-quality custom written papers on any topic. 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Civil War Reconstruction free essay sample

Whites in the south were left without people to work their plantations. Slavery was indeed a very important topic during this time. Many of the reconstruction plans that were proposed required states to prohibit slavery in order to be readmitted to the union. When the Civil War ended in 1865, there was no definite plan for reconstructing the Union. This was a Very serious matter. President Lincoln had begun thinking about this while he was in office. In 1863 he proposed his Ten Percent Plan.This policy would allow seceding states to return to the Union if ten percent of their prewar voters took an oath of loyalty to the Union and if the state would prohibit slavery. Although the plan forced states o prohibit slavery it did not force them to grant equal rights to blacks. The Ten Percent Plan was a good idea but some Republicans felt that it was not strict enough. This paved the way for the Wade-Davis Bill. This bill required the majority of a states prewar voters to pledge loyalty to the Union and that blacks were seen as equal in the eyes of the law.These plans led to controversy. Some people felt that because the constitution never mentioned succession, the states never actually seceded the Union so they didnt need to be formally readmitted. Others felt that the states from the South had given up their rights once they left the Union so they must be readmitted. Upon the close of the Civil War, Congress was not in session. They would not meet again until December. This left the burden of developing a reconstruction plan on the shoulders of President Andrew Johnson.So in May of 1865 Johnnys Reconstruction Plan was unveiled. Under this plan, Johnson gave pardons and restored property rights to former white landowners if they pledged loyalty to the Union and the Constitution. Southerners that held prominent positions in the Confederacy and had more Han $20,000 worth of taxable land had to ask the president directly for a pardon. Johnnys Plan had nothing to say about the rights of blacks after the war. Most Northern Democrats favored Johnnys Plan. However Southerners were not so impressed.Many of the southern states accepted Johnnys plan but some of them attacked the black rights issue. Some states would not ratify, the thirteenth amendment. None of the southern states WOUld allow blacks to vote. In late 1865 the southern States revised their slave codes into what became know as the black codes. This basically stripped lacks of every right and justice that was due to them. Since Johnnys plan did not address the rights and liberties of blacks, the southern states took it into their own hands to create their own laws regarding blacks.When Congress met again they began to fight for the rights of blacks. They responded to the black codes by passing the Civil Rights Act of 1866. President Johnson vetoed the bill but Congress overruled his veto with a 2/3 majority vote. Congress view of President Johnson began to deteriorate. The Military Reconstruction Acts did not go over well with President Johnson. He vetoed the bill, however the Radical Republicans passed it over Johnnys veto. These acts began in 1 867 and began what was known as Radical Reconstruction.Under this plan the south was divided into five districts. Excluding Tennessee because they had already been readmitted into the Union. Each of the districts were headed by a general. The main goal of the leader was to increase voter registration of blacks and to see to it that white confederates did not get back into office as they were before. The new voters would then vote on a new constitution that allowed blacks to vote. If he majority of the voters ratified the new constitution and the fourteenth amendment then the state would be eligible for readmission to the Union. These bills covered the objectives of Radical Republicans. They called for universal suffrage, made it likely that republicans would be put into office in southern states, and they set the standards for readmission. The south had to suffer the consequences of being defeated. To ensure their acts, Congress passed the Tenure of Office Act which prohibited the president from removing certain officeholders without the permission of the Senate. President Johnson deliberately violated this by firing Secretary of State Edwin Stanton.President Johnson was tried for impeachment but the Senate could not convict him. During this time many things were done to help free blacks in the South. The thirteenth amendment prohibited slavery. The Freedmans Bureau was created to assist blacks with things such as education and finding homes. The Homestead Act which gave blacks preferential treatment to get public land in the south. The Civil Rights Act of 1866 defined what civil rights were entitled to citizens. The fourteenth amendment which prohibited states from allotting the rights of their citizens.The fifteenth amendment which guaranteed every male citizen the right to vote regardless of race. Although the government did all these things to help the black man, it was still tough living in this era. The UK Klux Klan were at the height of their power. If was hard for blacks to farm because they could not get supplies on credit. There were not many opportunities for free blacks other than work for very small wages on a white persons farm or move to the city and work in a factory. This is what led to the migration of blacks from the farms to the cities and from south to north.

Witte And Stolypin Essay For Wilcock Essay Example

Witte And Stolypin Essay For Wilcock Essay For example White improved Russians production of raw material during the great spurt and stolidly reformed agriculture through things such as the strip system. Sergei White contributed massively o the industrial and economic expansion in Russia in the 1 8905 but only later on, after the economic trouble of 1901-1902 where 2400 firms closed, and during the great spurt(1892 did he make huge improvements. A major example Of how White improved Russians industrial standing was the completion of the trans-Siberian railway in 1 903 after its 10 year construction. It extended Russians railways from 30,km in 1890 to 60,km in 1 904, and therefore Since the railway stretched across most of Russia, it allowed for resources in areas such as Siberia to be made use of since prior to its instruction there was no way to reach them. This was reflected in the increasing production of coal, iron and oil, which all nearly tripled in-between 1900 and 1910. Communication between the central cities of Russia such as Baku, SST. Petersburg and Moscow increased along with their populations due to people making use of the railway and migrating to the cities. Baku for example grew from 12 thousand people in 1897 to 211 thousand people, and due to it being the centre of oil production, oil output rose from 3. 9 million tones to 9. 7 in 1910. White therefore, through the Trans Siberian railway yester drastically transformed Russians industry. Alongside this he had accomplishments in other areas such as the economy, for example in 1894 he managed to produce 30% of Russians revenue through establishment of the state liquor monopoly. And in 1 887 he put the ruble on the gold standard, which resulted Russians budget doubling and investment increasing. We will write a custom essay sample on Witte And Stolypin Essay For Wilcock specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Witte And Stolypin Essay For Wilcock specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Witte And Stolypin Essay For Wilcock specifically for you FOR ONLY $16.38 $13.9/page Hire Writer The military was another area which the growth of industry benefited as production of war materials grew significantly. Overall the culmination of all Whites achievements massively transformed Russians industry in a massively costive way, however agriculture in comparison to industry had no major reforms, which can be seen as one of his failures. Whites successor peter Stolidly had a shift in focus compared to Whites who singularly focused on industry. Since Russians heritage and main form of income and output throughout its history was agriculture, he believed it was the more important sector to focus on. Also due to his tsarist ideals he aimed to prevent another revolution so therefore aimed to improve the position of the peasantry. In terms Of agricultural transformations, the expansion Of the areas actually used for farming was a huge step forward. This was achieved through the incentives of cheap land in Siberia with the aid of government loans. These loans were also made more enticing due to the abolishment of the redemption payments on New Years Day 1907 which meant the agricultural workers werent tied down by other loans and payments. These reforms under Stolidly were considerably successful as in 1 906, agricultural production was 45. Million tones but by 1 91 3 it was 61. 7 million tones. The lives of those actually doing the work were also transformed due the peasants being freed from the commune under the law of 9 in November 906 and then financial aid was given in the form of the land bank after its creation on the 1 5th November 1906. Arguably one of Cytolysiss most effec tive reforms was the strip system. Allowing for the equal distribution of land along with a more effective farming method agricultural production rose massively and peasant owning their own land increased from 20% to 50% in between 1905 and 1915. The creation of the kulaks also improved agriculture since the new class of peasants were more hard working and motivated in comparison to their previous ways of being lazy and inefficient. Stolidly and his numerous reforms did undoubtedly transform Russians agriculture and improved upon its position in relation to agriculture before he took charge, however his reforms were cut short by the start of howl and Russians needs changed. However both Stolidly and White had drawback during their time as chief minister to the Tsar. White focused solely on industry without any notable thought to Russians agricultural position, which is reflected in the slow increase in cereal production in-between 1 890 and 1900 of 36 million tones to 56 million tones in comparison to the tripling of industrial production in the same timeshare. Living conditions in the urban areas decreased rapidly during Whites mass arbitration as the crowds that flooded into the towns and cities after the railways completion had nowhere to go since it all occurred to fast for the cities to expand and be able to accommodate the increasing populous. Also in relation to arbitration and industrial growth, everything he achieved, although it was a step forward for the previously backwards Russia, was far behind that of the western world. To support this it can be said that he did not transform industry and actually oaken it by urbanism to much since due to poor conditions, in some cases famine occurred which reduced Russians output as workers were not as effective.

Essay about IT240 Week 2 Checkpoint

Essay about IT240 Week 2 Checkpoint Essay about IT240 Week 2 Checkpoint Term Definition Physical layer Encompasses details such as electrical and mechanical connections to the network, transmission of binary data as changing voltage levels on wires or similar concepts on other connectors and data raters. Data link layer The Open Systems Interconnection (OSI) layer (2) that is responsible for data transfer across a single physical connection (or series of bridged connections, between two Network entities). The data link layer detects and may correct errors in the physical layer. Network layer The OSI layer that is responsible for routing, switching, and subnetwork access across the entire OSI environment. Transport layer Layer 4 of the Open Systems Interconnection (OSI) networking model, which establishes and dissolves connections between hosts and makes sure transmitted data has been received. An example protocol for the transport layer is TCP. Session layer Layer 5 of the Open Systems Interconnection (OSI) networking model, which handles logical connections between hosts; creates, maintains, and terminates a session; and handles security. It is a composite of the data flow control layer and transmission control layer. Presentation layer Layer 6 of the Open Systems Interconnection (OSI) networking model, which defines file and file access formats, performs file compression, establishes a common syntax between hosts, and converts data so incompatible systems can communicate with each other. Application layer Layer 7 of the Open Systems Interconnection (OSI) networking model, which defines standards for interaction at the user or application program level; for example, formatting electronic mail messages, reading and writing files, and file transfer. It is the highest layer of the protocol stack. Encoding Conversion of data into digital form; for example, converting an analog sound signal into digital data for storing on a CD. Half-duplex A communications channel which transmits data in either direction, but only one direction at a time. Full duplex A communications channel which transmits data in both directions at once. Bandwidth The amount of data that can be sent through a network connection. This is typically expressed in terms of the network speed, such as 1 Mbps (megabit-per-second). A greater bandwidth indicates the ability to transmit a greater amount of data over a given period of time. Point-to-point topology The simplest topology with a permanent link between two endpoints. Switched point-to-point topology are the basic model of conventional telephony. The value of a permanent point-to-point network is unimpeded communications between the two endpoints. Deencapsulation Refers to sending data where the data is augmented with successive layers of control information before transmission across a network. The reverse of data encapsulation is decapsulation, which refers to the successive layers of data being removed (essentially unwrapped) at the receiving end of a network. MAC Sublayer Medium Access Control sublayer. The lower sublayer of the data link layer, which uses the network's physical layer to provide services to the logical link control (LLC). The functions of the MAC sublayer vary according to the topology of the network. LLC Collision If two computers accidentally transmit at the same time and their messages collide, they wait and send again at different times. Access Method A software routine that is part of the operating system or network control program which performs the storing/retrieving or transmitting/receiving of data. It is also

Biography of Ruth Handler, Inventor of Barbie Dolls

Biography of Ruth Handler, Inventor of Barbie Dolls Ruth Handler (November 4, 1916–April 27, 2002) was an American inventor who created the iconic Barbie doll in 1959 (the doll was named after Handlers daughter Barbara). Barbie was introduced to the world at the American Toy Fair in New York City. The Ken doll was named after Handlers son and was introduced two years after Barbie debuted. Handler was the co-founder of Mattel, a company that manufactures a variety of popular toys. Fast Facts: Ruth Handler Known For: Handler founded the toy company Mattel and invented the Barbie doll.Born: November 4, 1916 in Denver, ColoradoParents: Jacob and Ida MoskoDied: April 27, 2002 in Los Angeles, CaliforniaSpouse: Elliot Handler (m. 1938-2002)Children: 2 Early Life Handler was born Ruth Marianna Mosko on November 4, 1916, in Denver, Colorado. Her parents were Jacob and Ida Mosko. She married Elliot Handler, her high school boyfriend, in 1938. Mattel With Harold Matt Matson, Elliot created a garage workshop in 1945. Their business name Mattel was a combination of the letters of their last and first names. Matson soon sold his share of the company, so the Handlers, Ruth and Elliot, took full control. Mattels first products were picture frames. However, Elliot eventually started making dollhouse furniture from picture frame scraps. That proved to be such a success that Mattel switched to making nothing but toys. Mattels first big-seller was the Uka-a-doodle, a toy ukulele. It was the first in  the line  of musical toys. In 1948, the Mattel Corporation was formally incorporated in California. In 1955, the company changed toy marketing forever  by acquiring the rights to produce the popular Mickey Mouse Club products. The cross-marketing promotion became common  practice  for future toy companies. In 1955, Mattel released  a  successful patented toy cap gun called the burp gun. Invention of Barbie In 1959, Ruth Handler created  the Barbie doll. Handler would later refer to herself as Barbies mom. Mattell founders Ruth and Elliott Handler with a barbie doll. Courtesy of Mattel   Handler watched her daughter Barbara and friends playing with paper dolls. The children used them to play make-believe, imagining roles as college students,  cheerleaders,  and adults with careers. Handler aspired  to invent a doll that would better facilitate the way young girls were playing with their dolls. Handler and Mattel introduced Barbie, the teenage fashion model, to skeptical toy buyers at the annual Toy Fair in New York on March 9, 1959. The new doll was very unlike the baby and toddler dolls that were popular at the time. This was a doll with an adult body. What was the inspiration? During a family trip to Switzerland, Handler saw the German-made Bild Lilli doll in a Swiss shop and bought one. The Bild Lilli doll was a collectors item  and  not intended for sale to children; however, Handler used it as the basis for her design for Barbie. The Barbie doll’s first boyfriend, the Ken Doll, debuted two years after Barbie in 1961. Handler said Barbie was a symbol of freedom and possibility for young girls and women: â€Å"Barbie has always represented that a woman has choices. Even in her early years, Barbie did not have to settle for only being Ken’s girlfriend or an inveterate shopper. She had the clothes, for example, to launch a career as a nurse, a stewardess, a nightclub singer. I believe the choices Barbie represents helped the doll catch on initially, not just with daughters- who would one day make up the first major wave of women in management and professionals- but also with mothers.† The Story of Barbie Handler created a personal story for the very first Barbie doll. She was named Barbie Millicent Roberts and she was from Willows, Wisconsin. Barbie was a teenage fashion model. Now, however, the doll has been made in many versions connected to over 125 different careers, including president of the United States. Barbie came as either a brunette or blond, and in 1961, a red-headed Barbie was released. In 1980, the first African-American Barbie and Hispanic Barbie were introduced. The first Barbie was sold for $3. Additional clothing based on the latest runway trends from Paris were sold as well for between $1 and $5. In 1959, the year Barbie was released, 300,000 Barbie dolls were sold. Today, a mint condition #1 Barbie doll can fetch as much as $27,000. To date, more than 70 fashion designers have made clothes for Mattel, using in excess of 105 million yards of fabric. There has been some controversy over Barbies figure ever since it was realized that if the doll were a real person, her measurements would be an impossible 36-18-38. Barbies real measurements are 5 inches (bust), 3 1/4 inches (waist), and 5 3/16 inches (hips). Her weight is 7  ¼ ounces, and her height is 11.5 inches. In 1965, Barbie had bendable legs and eyes that opened and shut. In 1967, a Twist N Turn Barbie was released that had a movable body that twisted at the waist. The best-selling Barbie doll of all time was the Totally Hair Barbie of 1992, which had hair from the top of her head to her toes. Other Inventions After fighting breast cancer and undergoing a mastectomy in 1970, Handler surveyed the market for a suitable prosthetic breast. Disappointed by the options available, she set about designing a replacement breast that was more similar to a natural one. In 1975, Handler received a patent for Nearly Me, a prosthesis made of material close in weight and density to that of natural breasts. Death Handler developed colon cancer in her 80s. She died on April 27, 2002, at the age of 85. Handler was survived by her husband, who died on July 21, 2011. Legacy Handler created one of the worlds most successful toy companies, Mattel. Her Barbie doll is one of the most popular and iconic toys in the world. In 2016, the Museum of Decorative Arts in Paris had a Barbie show featuring hundreds of dolls alongside artworks inspired by Barbie. Sources Gerber, Robin.  Barbie and Ruth: the Story of the Worlds Most Famous Doll and the Woman Who Created Her. Harper, 2010.Stone, Tanya.  The Good, the Bad, and the Barbie: a Dolls History and Her Impact on Us. Paw Prints, 2015.

Saladin The Divine Plan Of God Essay Example | Topics and Well Written Essays - 3250 words

Saladin The Divine Plan Of God - Essay Example From this paper it is clear that the two armies met face to face and realizing the weakness of the Franks, Muslims had a hand to hand fight with the Franks (Lane-Poole 193). The thirst, burning sun and the smoke of the bush that Muslims had fired, made the Franks lose their sanity (Lane-Poole 194). In desperation to reach the lake for water, Franks neglected the combination with their knights and by doing so, lost their only chance to victory (Lane-Poole 194). The Saracens eventually attacked all of them and killed them and captured the rest (Lane-Poole 194). Many of the soldiers surrendered and even the knights begged Saladin to kill them instead of leaving them to live a torturous life (Lane-Poole 195). Also, it is believed that 30,000 Christians lost their lives in the battle, which is famously known as the battle of Hattin (Lane-Poole 198). This paper makes a conclusion that Saladin was one of the greatest Muslim warriors who unified the Muslim countries for the first time and br ought together all the Muslim armies and transformed them into one army. Saladin was successful in winning the Holy war against the crusaders and restoring the Muslim rule on the Holy Land. Among all of his achievements, the victory of battle of Hattin was one of his greatest, and it made clear that Saladin’s rule in Egypt and his conquest of the Holy Land was nothing less than the plan of God. Hence, it won’t be wrong to say that Saladin was not only the king of Egypt, but was also a hand of God. ... Shirkuh continued his service under Nur al-Din, who took over Aleppo (Lyons and Jackson 3). On the other hand, the troops of Damascus attacked and besieged Saladin’s father in Baalbek (Lyons and Jackson 3). Ayyub had no choice but to surrender on favourable terms as no help from force came to his rescue (Lyons and Jackson 3). Ayyub moved to Damascus with his family and started living there (Lyons and Jackson 3). However, in the year 1154, when Nur al-Din attacked the city, Ayyub helped him to victory by making the surrender of Damascus easy (Lyons and Jackson 3). Later, he joined Nur al-Din (Lyons and Jackson 3). It has been noted by the historians that as Saladin’s childhood was spent in Damascus, he was particularly fond of that place (Lyons and Jackson 3). Saladin’s childhood and character Saladin was highly educated human being and was more inclined towards studies than towards military achievements (Lyons and Jackson 3). It was observed that Saladin was not only good at academic subjects like arithmetic and law, but was also knowledgeable of the Quran and the cultural heritage of Arab traditions (Lyons and Jackson 3). Saladin had learnt the values, attitudes, emotions and essence of Arab by learning by heart the anthology of Arab poets called as ‘Hamasa’ (Lyons and Jackson 3). Saladin’s ambitions were very moderate as he never aimed for power or command (Lyons and Jackson 3). However, destiny had something else in store for Saladin. He was destined to enter Egypt and become its king. First expedition to Egypt It can be said that God had destined Saladin to become a king. It was in the year 1163 that the events that led Saladin to Egypt took place. Shawar, the deposed vizier of Egypt, arrived in Cairo to ask

Human sexuality Essay Example | Topics and Well Written Essays - 2000 words

Human sexuality - Essay Example Two basic forces of life drive differentiation, especially distinctiveness and togetherness. Individuality helps individuals to be themselves by creating their identities as they follow certain directions. It is fundamental to acknowledge that togetherness is an act of pushing oneself to other people’s directions making one part of a group. Individuality and togetherness have balanced and healthy expressions when fused together. These two important components of differentiation affect relationships in several dramatic ways especially by providing an individual with ability to maintain his self-sense when he is either physically or emotionally close to others. It becomes more challenging when the persons are closely important to the individual. During pressure, especially when there is intense lobbying for conformity from friends and family members, differentiation enables one to maintain his course and direction. A person who is not capable of undergoing emotional fusion is of ten labeled as emotionally fuse (Schnarch, 2009). Differentiation also provides an individual with the ability to maintain his self-sense during times when his or her partner is away especially during the early periods of a relationship. In as much as an individual values his contact with the partner, he must never allow himself to fall apart when alone. It is not similar to individualism because it provides one with the ability to find equilibrium between individuality and togetherness. A person who is differentiated is not only strong but also permeable. Regardless of manipulation and moldings from a partner, a differentiated individual can still afford to remain collected and calm. This individual would be able to change and retain his identity with admirable values and cores. However, differentiation should not be mistaken as the absence of emotions or feelings. One can easily connect with his partner without being afraid of his emotions. The solution entails conduct an effective subjective and objective evaluation of emotions. Additionally, differentiation is a type of self-determination that does not imply to any kind of selfishness. One can choose to be guided by self-interests of his partner at the expense of his own agenda. This does not mean that he is under rule from the other. A differentiated person recognizes the fact that people are different in nature and therefore have different interests. He must appreciate what these people want for themselves. Although, various ways of expressing love are evident, differentiation is a distinct way of articulating love. It is argued as a noble concept that one could partake. In couple’s therapy, differentiation can enable each partner to understand themselves in terms of both strengths and limitations and use constituting factors to enhance their marriage (Charlton & Yalom, 1997). Intimacy Intimacy is an experience that makes one aware that he is separate from his partner though he has parts and feelings that need sharing. It normally accompanies comm unication where each partner freely discloses personal information to the other. However, communication can exist without intimacy, especially in situations where people are engaged in verbal exchanges. Communication is not confined to absence of exchanges between couples because it entails any interaction that makes partners in marriage feel bad though this is poor communication. This implies that intimacy cannot be measured using communication if messages being