Pennies Lab

Density of Pennies Lab Introduction The one cent coin, commonly known as the cent, was the first currency of whatsoever type authorized by the United States. (www.pennies.org, pg.1)The first centime was made in 1787, calm of pure shit. They continued to nominate pure slovenly person pennies until 1837 when they switched to bronze. In 1857 they began victimization copper and nickel. The opus of a penny changed twice more before 1982. The pre-1983 penny was made of an alloy of copper and zinc. An alloy is a center that has alloy characteristics and consists of two or more different elements. (Coordinated Science, pg.1005) Our documental is to welcome the admixture utilise inside a situation-1983 penny. The certain measure of the stringency of a post-1983 penny is 7.05g/cm3. Density is the passel per unit volume of a material. (Coordinated Science, pg. 354) By imagine the tightness of post 1983 pennies, we depone compare it to the given parsimoniousness values of other metals to budge the metal used in the core of a penny. Conclusion The metal used inside post 1983 pennies is zinc. We came to this conclusion by cypher the density of post 1983 pennies using the equation; weedvolume=density. WE conducted three trials of this seek and found the intermediate density of a penny to be 6.92 g/cm3.

The accepted value of a post 1983 penny is 7.05g/cm3. Our percent hallucination was 1.8%. In battle array to take on logical results, your percent error must be embody 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 scat of our calculated density. Our purpose had to be adjusted three times in assemble to run across accurate data. Our original procedure didnt measure mass or volume correctly. subsequently adding in the correct steps, we conducted the test successfully. Once our procedure was finalized, we were commensurate to spend a penny the results we needed. I wouldnt change the procedure....If you want to get a full essay, order it on our website: Orderessay

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