Density of pennies before and after 1982 lab

Density of pennies before and after 1982 lab

Chemistry Lab Pennies 1982 - Free download as Open Office file (.odt), PDF File (.pdf), Text File (.txt) or read online for free. This is an experiment we made to find the difference of mass between pennies before 1982 and after 1982, we used this experiment to learn how the accuracy and precision could change when making more than one trials ... DENSITY OF PENNIES MINTED BEFORE AND AFTER 1982 Background: From 1962 to 1981, the composition of pennies, with a few exceptions, was a homogeneous mixture (uniform appearance throughout the sample) of 95% copper and 5% zinc. In 1982, the United States Mint changed the composition, due to the rising price of copper. Mar 27, 2014 · One of the pennies was pre-1982 while the other was post 1982. This was performed due to the change in the amount of copper used for pennies after 1982. Pennies before 1982 were made to contain 95% copper and 5% zinc. After 1982, electroplating techniques were used to help the government save money. In addition, it is called a Lincoln Union Shield cent. The last year pennies were made of copper was 1982. However, the penny composition material used to make a penny has changed over the years. Compositions of the penny are listed below: Penny Composition. Penny Metal Composition by Year: 1793-1837 – Pure copper. Conclusion: In this lab, the pre-1982 pennies had an average density of 6.3 g/mL. Based on these results, I Based on these results, I believe the pennies were made from the element tellurium, which has a density of 6.232 g/mL.

Conclusion: In this lab, the pre-1982 pennies had an average density of 6.3 g/mL. Based on these results, I Based on these results, I believe the pennies were made from the element tellurium, which has a density of 6.232 g/mL. In addition, it is called a Lincoln Union Shield cent. The last year pennies were made of copper was 1982. However, the penny composition material used to make a penny has changed over the years. Compositions of the penny are listed below: Penny Composition. Penny Metal Composition by Year: 1793-1837 – Pure copper. In this experiment you will determine the density of pennies before and after 1982. Since the pennies minted before 1982 are known to be essentially pure copper, the results obtained will provide an estimate of the accuracy of the experiment and act as a control.

The main purpose of this experiment will be to discover if any differences exist with comparison of pennies dated before 1982 to pennies dated after 1982, such as the average of the volume and the average of the mass. And last but not least, I will practice my expertise of determining densities of objects, as in this case, the pennies. Oct 23, 2011 · Wk5 lab 4 density of pennies 1. Lab 4: Density of Pennies• Title• Objectives • To determine mass, volume and density of Pennies • Compare and contrast Densities of Pre-1982 and Post 1982 Pennies • To master use of the balance, graduated cylinder, calculating averages and the derived SI unit of Density.•

Today’s penny is quite different from the penny of a few decades ago. Before 1982, pennies were made of copper. Since then they have been made with an outside coating of copper and an inside core of a different metal. This difference causes the pennies to have different density values. Density is a physical property. Sep 02, 2016 · 5 modern Lincoln cents worth over $1,000 that can be found in pocket change! - Duration: 10:01. Coin Opp Recommended for you

Today’s penny is quite different from the penny of a few decades ago. Before 1982, pennies were made of copper. Since then they have been made with an outside coating of copper and an inside core of a different metal. This difference causes the pennies to have different density values. Density is a physical property. Today’s penny is quite different from the penny of a few decades ago. Before 1982, pennies were made of copper. Since then they have been made with an outside coating of copper and an inside core of a different metal. This difference causes the pennies to have different density values. Density is a physical property. Sep 02, 2016 · 5 modern Lincoln cents worth over $1,000 that can be found in pocket change! - Duration: 10:01. Coin Opp Recommended for you

In a modern physics textbook, the mass of a penny was used as part of a word problem. It gave the mass of a penny to be 3.1 grams. Along with that information, I found a website that discussed the composition, mass, and density of a penny. The mass of a penny was 3.1 grams before 1982, but a penny after 1982 weighs 2.5 grams. Before 1982, the pennies were made out of almost exactly the opposite (90% copper, 10% zinc). Materials: • Scales • 20 pennies minted after 1982 • Graduated cylinder. Procedure: 1. Counted out 20 pennies that were minted after 1982 2. Placed the pennies on a scale and weighed them all at once 3. The researchers’ research question is what the density of a post 1982 U.S. penny is. The researchers then came up with a hypothesis and it states that if density of a post 1982 penny was determined, then it would be 5.66g/mL. Research was done on what happened on 1982 that made the penny density change. Compare the densities of pennies minted prior to 1982 and pennies minted after 1982. 2. According to the US Mint (www.usmint.gov), pennies minted before 1982 are made of copper. Copper has a density of 8.96 g/mL. Compare the density you calculated for pennies minted before 1982 to this accepted density.

In this lab, you will determine and compare the density of two sets of pennies by graphing mass vs. volume. Penny Set A was minted before 1982. Penny Set B was minted after 1982. In 1982, the U.S. Mint changed the composition of pennies. Based on their density, determine the metals used in pre-1982 and post-1982 pennies. Before 1982, pennies were made of a copper alloy. Since then, they have been made with an outside coating of copper and an inner core of a different metal. In this experiment, you will use a graph to determine the density of post-1983 pennies. Then, you will use known density values to identify the metal used in the core of these pennies. In this lab, you will determine and compare the density of two sets of pennies by graphing mass vs. volume. Penny Set A was minted before 1982. Penny Set B was minted after 1982. In 1982, the U.S. Mint changed the composition of pennies. Based on their density, determine the metals used in pre-1982 and post-1982 pennies. Your already have some experience determining mass in the laboratory. In this experiment, you will measure volumes of different masses of pre- and post-1982 pennies. Prior to 1982 pennies were nearly 100% copper. Post-1982 pennies contain a different metal coated with a very thin layer of copper. Density is an important property of matter. Homework Week 6 Homework, #5-6 The phenomenon In 1982, the density of pennies changed. Your challenge: Determine, empirically, the density of pennies before and after 1982. Write a materials list and procedure. Include ALL your steps. Be thorough! Carry out your procedure. Record and organize data into a chart and graphs. In this experiment you will determine the density of pennies before and after 1982. Since the pennies minted before 1982 are known to be essentially pure copper, the results obtained will provide an estimate of the accuracy of the experiment and act as a control.

Before 1982, pennies were made of a copper alloy. Since then, they have been made with an outside coating of copper and an inner core of a different metal. In this experiment, you will use a graph to determine the density of post-1983 pennies. Then, you will use known density values to identify the metal used in the core of these pennies.

resulted in differences in the penny's characteristics, including its density, or mass per unit of volume. In this experiment, you will determine and compare the densities of pennies minted before 1982 and after 1983, and use density data to try to identify the metal used in the core of pennies minted after 1983. OBJECTIVES The main purpose of this experiment will be to discover if any differences exist with comparison of pennies dated before 1982 to pennies dated after 1982, such as the average of the volume and the average of the mass. And last but not least, I will practice my expertise of determining densities of objects, as in this case, the pennies. In addition, it is called a Lincoln Union Shield cent. The last year pennies were made of copper was 1982. However, the penny composition material used to make a penny has changed over the years. Compositions of the penny are listed below: Penny Composition. Penny Metal Composition by Year: 1793-1837 – Pure copper.

The main purpose of this experiment will be to discover if any differences exist with comparison of pennies dated before 1982 to pennies dated after 1982, such as the average of the volume and the average of the mass. And last but not least, I will practice my expertise of determining densities of objects, as in this case, the pennies. DENSITY OF PENNIES LAB Before 1982, pennies were made of a copper alloy. Since then, they have been made with an outside coating of copper and an inner core of a different metal. In this experiment, you will use a graph to determine the density of post-1983 pennies.

From 1793–1857 pennies were made of 100% copper. Since 1857, the composition of the penny has changed several times. In 1982, there was a drastic change amount of copper a penny contained. In this lab, you will use the physical property of density to determine the composition of pennies minted before and after 1982. Today’s penny is quite different from the penny of a few decades ago. Before 1982, pennies were made of copper. Since then they have been made with an outside coating of copper and an inside core of a different metal. This difference causes the pennies to have different density values. Density is a physical property. Pennies made after 1982 are made of mostly zinc with a thin copper coating. Therefore, post-1982 pennies are 97.6% zinc and 2.4% copper. The density of copper is 8.96g/mL. The density of zinc is 7.13g/ml. Using this information, explain, IN WORDS, why a penny made before 1982 will have a greater mass than a penny made after 1982. From 1793–1857 pennies were made of 100% copper. Since 1857, the composition of the penny has changed several times. In 1982, there was a drastic change amount of copper a penny contained. In this lab, you will use the physical property of density to determine the composition of pennies minted before and after 1982.

In this experiment you will determine the density of pennies before and after 1982. Since the pennies minted before 1982 are known to be essentially pure copper, the results obtained will provide an estimate of the accuracy of the experiment and act as a control. Mar 27, 2014 · One of the pennies was pre-1982 while the other was post 1982. This was performed due to the change in the amount of copper used for pennies after 1982. Pennies before 1982 were made to contain 95% copper and 5% zinc. After 1982, electroplating techniques were used to help the government save money. The Lincoln Cent. A science project about the Lincoln Cent? Sure. After all, science is all around us in all aspects of our lives. One great benefit of this experiment is that the cost is literally pennies !! Before we begin, the coin is technically called a cent. Look at the reverse side ( the 'tails' side). It doesn't say penny does it? experiment, you will determine and compare the densities of pennies minted before 1982 and after 1983, and use data to try and identify the metal used in the core of pennies minted after 1983. experiment, you will determine and compare the densities of pennies minted before 1982 and after 1983, and use data to try and identify the metal used in the core of pennies minted after 1983. Conclusions The density of pennies made before 1982 was measured to be 8.79 g/mL, while the density of pennies made after 1982 was measured at 6.90 g/mL. This confirms our hypothesis stating that the pre-1982 pennies would be more dense.