Pennies Lab

Density of Pennies Lab Introduction The one cent coin, commonly known as the cent, was the first currency of any sign authorized by the United States. (www.pennies.org, pg.1)The first penny was make in 1787, peaceful of clarified shit. They continued to produce pure copper pennies until 1837 when they switched to bronze. In 1857 they began utilise copper and nickel. The composition of a penny changed twice more before 1982. The pre-1983 penny was make of an deprave of copper and zinc. An alloy is a substance that has alloy characteristics and consists of two or more different elements. (Coordinated Science, pg.1005) Our objective is to accept commensurate the metal utilise inside a convey-1983 penny. The accepted valuate of the closeness of a post-1983 penny is 7.05g/cm3. Density is the megabucks per social unit volume of a material. (Coordinated Science, pg. 354) By reckon the absorption of post 1983 pennies, we depose compare it to the given minginess set of other metals to dislodge the metal used in the effect of a penny. Conclusion The metal used inside post 1983 pennies is zinc. We came to this conclusion by calculating the density of post 1983 pennies using the equation; massvolume=density. WE conducted three trials of this taste and found the intermediate density of a penny to be 6.92 g/cm3.

The accepted order of a post 1983 penny is 7.05g/cm3. Our percent erroneous belief was 1.8%. In battle array to have logical results, your percent error must be equal to or below 3% and ours was below. Once we found our results to be valid, we compared our average density to the density of the given metals. ! The density of zinc, 7.00 g/cm3, was the walking(prenominal) density in put of our calculated density. Our single-valued function had to be adjusted three times in order to find accurate data. Our original procedure didnt measure mass or volume correctly. aft(prenominal) adding in the correct steps, we conducted the audition successfully. Once our procedure was finalized, we were able to mother the results we needed. I wouldnt change the procedure....If you want to get a full essay, order it on our website: OrderCustomPaper.com

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