Pennies Lab

Density of Pennies Lab Introduction The one cent coin, ordinarily known as the cent, was the first currency of any display case authorized by the United States. (www.pennies.org, pg.1)The first penny was do in 1787, peaceful of slender shit. They continued to produce pure copper pennies until 1837 when they switched to bronze. In 1857 they began development copper and nickel. The composition of a penny changed twice more before 1982. The pre-1983 penny was do 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 welcome the metal utilise inside a ring armour-1983 penny. The accepted apprise of the assiduousness 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 tightfistedness of post 1983 pennies, we depose compare it to the given densi ty determine of other metals to dislodge the metal used in the ve strikecapable marrow 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 wind of a post 1983 penny is 7.05g/cm3. Our percent flaw 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 range of our calculated density. Our action had to be adjusted three time in order to find accurate data. Our original procedure didnt measure mass or volume correctly. afterward adding in the correct steps, we conducted the audition successfully. Once our procedure was finalized, we were able to get the results we needed. I wouldnt change the procedure....If you want to get a full essay, order it on our website: OrderCustomPaper.com

If you want to get a full essay, visit our page: write my paper