We found that pennies can be put into 2 different groups by mass. Why are there 2 types of pennies and when did we chagne how they were used. Please help I'll really appreciate it!
2006-10-08 15:52:25 · 4 answers · asked by izzy_009 1 in Science & Mathematics ➔ Other - Science
1982 - 1982 - Lincoln Cent The rising price of copper finally took its toll on the Lincoln cent in 1982. The composition in 1982 was changed to an alloy of 99.2 percent zinc and 0.8 percent copper, plated by pure copper - making the total composition 97.5 percent zinc and 2.5 percent copper. The year was marked by more than the composition. There were small and large date cents of both the old and new composition from both Philadelphia and Denver, creating what was literally a collection of seven 1982 cents.
The following year brought the first significant copper-plated zinc cent rarity in the form of the 1983 doubled die reverse, which had boldly doubled reverse lettering. The following year saw the production of a boldly doubled obverse, a rare back-to-back set of modern errors.
The trend of periodic doubled dies has continued to the present day, providing collectors of Lincoln Memorial cents with plenty of opportunities to find valuable coins in the course of regular transactions. The 1995 doubled die cents are still being found as collectors and speculators purchase unopened Mint bags in the hopes of finding additional examples.
2006-10-08 15:54:31 · answer #1 · answered by DanE 7 · 0⤊ 0⤋
...
dude, i just went to Wikipedia, typed in "penny", and followed a grand total of Two (2) links, which were very obvious links to follow, and i got to this page where the first heading was "History of composition" and the VERY FIRST SENTENCE was
"The cent's composition was changed in [year] because..."
took me longer to actually type this than to find that page.
moral of the story? spend two freakin minutes and do a little of your own research. you may find that you don't even need this site.
2006-10-08 22:59:41 · answer #2 · answered by Rocky the Id 2 · 0⤊ 0⤋
I don't know, but it sounds like another underhanded plot by the republicans. Try a search for Denver mint. There are supposed to be standard weights for all coinage.
2006-10-08 22:59:55 · answer #3 · answered by Kim 4 · 0⤊ 0⤋
WHAT THE HELL DO THEY TEACH YOU IN SCHOOL????????
2006-10-08 22:54:23 · answer #4 · answered by daniella 2 · 0⤊ 0⤋