the past. If you take a look at a penny‚ most people will see our sixteenth president‚ and some will just see a cooper mixed zinc coin that is worth one cent. However‚ what most people don’t realize is that this penny shows the history of how our nation came to be and how we strive in still remembering our traditions. Although some people find the penny a useless and an immaterial piece of the coin‚ people should treat a penny like a regular dime or nickel. The penny has important historical information
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Over the past few years‚ the debate on whether or not the penny should remain a part of the U.S. currency system has increased in popularity. With many politicians‚ journalists‚ and everyday citizens giving their opinion‚ the topic has certainly caused controversy. Although many would suggest otherwise‚ the penny coin is a historically and monetarily valuable aspect of American culture that should remain intact. Pennies hold significance in retaining American history. It had been the first coin
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Measurements and Error Analysis‚ #1‚ Chris Baca Discussion of differences The purpose of this experiment is to understand why we have variances in measurements and how to reduce the variances. When taking a measurement there are multiple factors that affect its value. The more the measurement is taken the measurements average is closer to the actual value. Other factors include the instruments calibration‚ cleanliness of the inside of the measuring arms and human error in reading the measurements
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My results of part B shows that a penny can hold 21 drops of water on the top. This relates to adhesion since the penny that is copper is attracted to a different substance which is water. When the drops hit the penny‚ the adhesive force of the water and the penny keeps the water from falling off the sides. It also shows high cohesion since the water molecules are attracted to each other. In a water molecule it has a hydrogen bond of oxygen and hydrogen since they are attracted to one another. It
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mass of copper wire was 1.250g but the recovered copper was only 0.120 subtracting the mass of the recovered copper with beaker from the tare beaker mass. So the percentage yield resulted only to 9.6% it is very little‚ and it may be due to many possible sources from doing the steps. Adding too much or too little of a compound to the copper solution‚or the loss of copper during transport or by being left on the stirring rod. Another situation which was a source of error is when the copper solution
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Laboratory report Aluminum Copper Alloy MSCI 300 – Thermodynamics of Materials Alexandre de Freitas Silveira Eau Claire December 18th‚ 2012. Abstract: At this experiment‚ the composition of an alloy of Aluminum Copper was analyzed via X-Ray Fluorescence. From this‚ it was possible to construct a phase diagram a make some predictions about the possible phases presents at considering the 3 samples used in this experiment‚ the samples prepared at this experiment the sample as delivered
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CH 130 B: General Chemistry I The Lab Report As a scientist you are responsible for conveying the results of an experiment to a supervisor‚ a colleague‚ or the public. Often‚ you will convey this information in the form of a scientific paper describing your work. This paper needs to clearly describe why and how an experiment was done‚ and it must include an interpretation of results‚ including a discussion of their importance and any significant sources of error. You lab report will
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the ‘penny’‚ has been a part of United States history for over two hundred years.” It’s time for those two hundred years‚ and counting‚ to be over. The penny needs to stop being produced to best help the consumer and the government. In “Penny Anti” by John Fund‚ the economical reasons for getting rid of the penny are listed‚ as well as alternative solutions to the one-cent piece. In the second article‚ “The Many Faces of the Penny‚” by J. Wendell Shelton‚ there is a backstory of how the penny we know
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Copper is one of the few metals that have been mined for more than 100 decades globally. According to M.G.C Wilson (1989) copper has been mined since the early 3000 BC in Cyprus. In the ancient times copper was used for making tools‚ weapons‚ ornaments and many household utensils. Copper is the third most widely used metal after aluminium (Al) and iron (Fe) because of its high durability (Doebrich et.al‚2009). In the Southern African region copper has been extracted by the early inhabitants long
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in the minting of pennies before and after 1982 by calculating their densities. Hypothesis If the penny was made after 1982 then its density will be higher than those made before 1982. Materials • 1 Graduated cylinder • 30 mL of water • 10 pennies minted before 1982 • 10 pennies minted after 1982 • 1 electric scale Procedure The mass of ten pennies minted before 1982 was calculated five times using the scale and then averaged. These steps were repeated with the pennies minted after 1982
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