Percent Mass of Copper in a Penny Introduction The purpose of this lab is to determine the percent mass of Cu in a penny and see if the fabricator that makes the planchets for the government is using the correct amounts of Cu in the pennies. The composition of a standard penny is 97.5% Zn and 2.5% Cu. In the lab we will be using Beer’s Law (A=elc+b where A is solution absorbance‚ e is a constant called molar absorbency‚ l is the length in cm‚ and c is the concentration). Using Beer’s Law in this
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Koko was a Gorilla that was trained sign language at an early age by her primary caregiver Penny. Penny performed an experiment‚ testing to see if primates like gorillas can communicate in sign language with humans. The reason Koko was so special because she is the longest animal study in history. It infatuated the public when Koko was first in the public eye on the cover of National geographic holding kittens. Koko changed how people viewed animals‚ and got people to their emotions. Before this
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Penny Press Until the early 1800’s‚ newspapers in England and America were expensive and therefore exclusive to the wealthy and literate minority. On average‚ newspapers would cost around six cents per issue and were usually sold through subscription only. Readers would have to pay for a years’ worth of newspapers when first signing up for a subscription‚ and that cost could be a middle-class worker’s week’s wage. Most people could not afford newspapers and therefore could not receive daily news
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walked past a penny on the ground or carelessly dropped it on the floor and not picked it up‚ thinking that a penny is not worth your time. The Canadian mint produces nearly one billion pennies a year and sets them off for circulation where most of them will spend their time on the streets or collected in jars. The Royal Canadian Mint says it costs only 0.7 cents to make a penny but if you factor in other costs such as shipping the pennies to banks then it could add up to 4 cents per penny. Surely we
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Penny Synthesis Essay To “… not ban pennies‚ but merely discourage their use by establishing a system…” It is because I agree with Mark Lewis of Forbes.com‚ that I affirm abolishing the penny‚ yet with some restrictions. In 2001 a United States Representative by the name of Jim Kolbe introduced a proposition to eliminate the penny (United States’ lowest denomination coin). To deeply reason as to why an individual might support this proposition‚ we must look at three different points of analysis
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* “ A penny saved is a penny earned.” People do not realize that their is a history behind the changes of the penny. For instance Americans wanted to honor Lincoln’s birthday‚ but some Americans complained about the initials being too big‚ another reason for change was during World War II America needed supplies to use for battle. There is a history behind the penny that many people are unaware of. To begin with‚ the penny was changed due to Lincoln’s birthday. According to the text‚ “The strong
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Imagine waking up each morning having to sweep up dust that blew into homes at night. Nearly starving from lack of food and water then going broke and living without a home with family’s to care for. We’ll that was life during the Dust Bowl having to face the Great Depression and loving in the Southern Plains.The Dust Bowl was a very unexpected tragedy that hit America in the 1930 lasting a whole decade. The dust bowl accrued mostly of high climates mixing with the broken down jet stream in Mexico
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The Dust Bowl was the name given to the Great Plains region devastated by drought in 1930s depression-ridden America. The 150‚000-square-mile area‚ encompassing the Oklahoma and Texas panhandles and neighboring sections of Kansas‚ Colorado‚ and New Mexico‚ has little rainfall‚ light soil‚ and high winds‚ a potentially destructive combination. When drought struck from 1934 to 1937‚ the soil lacked the stronger root system of grass as an anchor‚ so the winds easily picked up the loose topsoil and swirled
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Harper’s father had hoped for a son but that didn’t stop him from growing attached to his little girl from the moment he first held her in his arms. As a child‚ he’d encouraged her curiosities and taught her the things she seemed so eager to learn‚ assuming that when she grew older she would eventually become more interested in the lifestyles of other girls her age. The day never came that she was excited for the intricate new dresses gifted to her or the extravagant balls on the arm of a young officer;
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Abolish the Penny Between 2001 and 2006‚ there has been an increase of .6 cents for the reproduction of the penny. This increase displays economic problems that may lead to fatal ones. The penny is composed of 2% copper and 98% zinc. These elements are exponentially in demand causing the price of these materials to skyrocket. Many Americans think the penny is putting our country in jeopardy with financial losses. This meaningless coin is losing money for the mint‚ and should be abolished.
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