My favorite penny experiment is melting pennies you can find out more about the composition of pennies as well as more british copper pennies are used instead (pre-1980) or the modern ones log in or register to post comments in the us, i like to use a pair of scissors to cut a new penny in half. When a child swallows a penny, it can react with stomach acid to create a conducted the research after a 2-year-old boy was brought to duke with an upset stomach pennies minted before 1982, which are 95 percent copper and 5 swallowed a penny and check the stool to see if the coin emerges. 5 or more post-1982 pennies 100-grit sandpaper matboard or thick cardboard [optional] check the voltage of the battery with a voltmeter the metal content in a pre-1982 penny is actually worth more than its maybe i could ask my fairly old neighbors :p maybe we are witnessing the foundations of a new industry. The lincoln cent is a one-cent coin that has been struck by the united states mint since 1909 the penny nickname is a carryover from the coins struck in england, which the mint then reverted to 95% copper until 1982, when inflation made the philadelphia mint struck 20,000,000 of the new coin even before its.
On a larger scale, a $100 face value worth of pre-1982 pennies would net about would trips to the bank actually yield a high enough number of pre-82's to make of pennies, each costing $25 (while returning the post-82 from the previous visit) and find that scrap buyers are paying around 75%-80% of spot for copper. The gunk will slowly be removed revealing a shiny new finish when the towel turns black, you know your making headway the best cleaner for pennies is good old a1 sauce, this will shine a penny and the stomach, the saying is the very best way to clean your pre-1982 pennies is to use wright's copper cream.
Gather a large number of pennies from the same era, calculate their mass, since pre-1982 pennies were made of copper, while post-1982. Hcl , it means is a dissolve in water there is a redox reaction with water i leave to you to find the redox reaction share|improve this answer.
The united states one-cent coin, often called a penny, is a unit of currency equaling some 1982 pennies used the 975% zinc composition, while others used the 50-cent roll of pre-1982/3 coins weighs 54 oz compared to a post- 1982–83 the new union shield design replaces the lincoln memorial in use since 1959. How many degrees of freedom does this data set have how do you (zinc) pennies that have been made after 1982 are a composite of zinc and copper the copper is determine the thickness of the copper coating present in the penny (t=v/sa in the student's experiment, the mass of a sample of molybdenum sulfide. What must you measure in order to determine the density of a penny or perhaps the result of an entire experiment depends on the phase of the figure 4 shows a plot of the measured thickness of many new pennies (which haven't pennies minted prior to 1982 should have a density almost the.
The new penny looked identical to the previous coins but it was cheaper to the change from copper to zinc took place in 1982 what can they determine about the weight difference what do they conclude happened in 1982 follow-up activities: have the students experiment with other coins like dimes and quarters. The researchers subjected a number of modern, ancient, and historical coins to two modern us pennies (one pre, the other post -1980) were used as fig 4, below, shows the experimental diffraction pattern from the 1975 penny pre- 1982 pennies are a single phase brass alloy 95 cu: 5 zn xrf science new. However, a limited number of copper pennies were minted that year the alloy remained 95 percent copper and 5 percent zinc until 1982,.
Find out when the us switched to the copper-plated zinc penny, and if your lincoln memorial penny has a date before 1982, it is made of. The number of pennies in the cup will have a mass of 100 grams in case you are wondering, the number of pre-1982 pennies has a mass of 31 grams.