Penny Density Lab Article

Purpose

The aim of this lab is to understand which metals were used in the minting of pennies before and after 1982 simply by calculating their very own densities. Hypothesis

If the any amount of money was made following 1982 then its density will be higher than those manufactured before 1982. Materials

•1 Graduated cylinder

•30 mL of drinking water

•10 pennies minted ahead of 1982

•10 pennies struck after 1982

•1 electric power scale

Method

The mass of 10 pennies struck before 1982 was worked out five times using the scale then averaged. These steps were repeated with the money minted following 1982. 40 milliliters of water was placed into the graduated cyndrical tube. The pennies minted prior to 1982 had been placed in water and the fresh volume was written and accustomed to calculate the amount of the pennies. The five calculations were averaged. These steps were in that case repeated with the pennies struck after 1982. The accurate of the mass and amount data was calculated. The mass calculations were divided by the quantity calculations to find the densities for both models of cents.

Data and Observations

TrialMass of pennies struck before 1982Mass of money minted ahead of after 1982 #130 grams24 grams

#231 grams24 grms

#330 grams24 grams

#430 grams25 grams

#531 grams24 grams

TrialVolume of money minted prior to 1982Volume of pennies struck after 1982 #14 milliliters3 milliliters

#24 milliliters3 milliliters

#34 milliliters3 milliliters

#44 milliliters3 milliliters

#54 milliliters3 milliliters

Bottom line

My speculation that the cents made after 1982 would be denser than those minted later was maintained the experiment. The collected data demonstrates that the older pennies have got a denseness of 7. 6g/mL В±. 5g/mL. This density is closest to the thickness of zinc, which has a denseness of 7. 19. The new pennies have a denseness of eight. 07 g/mL В± 1g/mL. This density is nearest to the denseness of pennie, which has a thickness of almost eight. 85 g/mL. The percent error for the denseness of the more mature...

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