No Need to Count Your Pennies Lab Have you ever saved pennies. nickels, or dimes? if you have, you probably took them to the bank in paper wrappers provided by the bank Tellers at the bank could take the time to open each roll and count the coins to determine their dollar value. However. counting is not necessary because tellers use a better system. They use the properties of the coins instead. A penny, a nickel, and a dime each has a particular mass and thickness. Therefore. a roll of coins will have a certain mass and length. These two propertiesmass and lengthare often used to determine the dollar value of the coins in the roll. Pre Lab Safety Instructions Before you begin the lab. talk with you teacher to get your safety instructions. You need a signature from your teacher before you start showing you had your talk. Teach er's Signature Procedure 1. Using the balance, determine the mass of 1 coin, 2 coins. 3 coins. 4 coins. 6 coins. 8 coins. 1!} coins, 15 coins and 21.1 coins to the nearest {1.1 g using a triple beam balance. Record the masses in Table 1 in the Data section. 2. Measure the thickness of 1 coin, 2 coins, 3 coins, 4 coins. 6 coins. 8 coins. It} coins. 15 coins. and 211 coins to the nearest millimeter using a meter stick. Record these values in the Table 1. 3. Return all materials to where they belong. Make sure your area is picked up before you start in on the Calculations. Data Teacher Signature Calculations 1. Make a graph using the data that shows the number of coins on the xaxis and the mass on the y-axis. Be sure to label each axis. When vou are nished plotting vour uoints. use a straight edge to draw the