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Up into 1982, US pennies were 95% copper, but that year the composition was changed and now they're 97.5% zinc.
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∙ 6y ago
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What physical difference can you detect from pennies that are dated before 1982 verses pennies that are dated after 1982?
The weights are different. Pre-1982 pennies are 95% copper and weigh 3.11 grams. Newer ones are mostly zinc and weigh 2.5 grams.
How much does 1000000000 pennies weigh?
It depends if you are talking about pre-1982 pennies or post-1982 pennies.
How much does copper penny weigh?
Copper pennies minted before 1982 weigh 3.11 grams.
Which is more dense a penny from before 1972 or a penny from after 1972?
1972 has no significance in terms of changes in penny densities. The US Mint did not change the composition of its penny between 1909 to 1982, so any pennies from within this time period would have the same density. Pennies from this time period all contained the same proportions of metals (95% copper, 5% zinc.) Coins from post-switch 1982 to present day are minted of 97.5% zinc and 2.5% copper. Copper's density is ~8.9g/cm3 while zinc's density is ~7.1g/cm3. Considering the relative compositions of each version of the penny, the post-1982 penny would be the less dense penny, and the pre-1982 penny would be the more dense of the two.
How much does 1 in US pennies weigh?
3.11 grams for pennies made from 1959 to 1982
Is the ratio of copper to zinc in the pennies made after 1982 higher or lower than the ratio of copper to zinc in the pennies made before 1982?
The pre-1982 pennies are 95% copper and 5% zinc. Post-1982 cents are 97.5% zinc and 2.5% copper.
Were 1950's pennies made of cooper?
Pennies from 1982 and before were all copper
How much is 130lbs pennys us weight in dollars?
It depends on the year. Before 1982, pennies contained 95% copper and 5% zinc. Those minted after 1982 are 97.5% zinc and 2.5% copper. Today's pennies weigh less. So if the majority of the pennies are after 1982, you would most likely have about 23,586 pennies, which is equal to $235.86 USD. If the majority of the pennies are before 1982, you would most likely have 18,960 pennies, which is equal to $189.60 USD. But then again you can smelt the pennies and sell the copper. I hope this helped you. :)
What physical difference can you detect from pennies that are dated before 1982 verses pennies that are dated after 1982?
The weights are different. Pre-1982 pennies are 95% copper and weigh 3.11 grams. Newer ones are mostly zinc and weigh 2.5 grams.
Which is more dense a pre 1982 penny or a post?
8.869 grams per cubic centimeter approximately. Some 1982 pennies are made of bronze alloy (pre1982) and some are copper plated zinc (post 1982). The change was made at the beginning of 1982 after some pennies had already been struck.
How many pennies does it take to weigh a pound?
Cents weigh different amounts depending on their dates. Before 1982, cents weighed 3.11 grams. Cents issued after 1982 weigh 2.5 grams. Cents issued DURING 1982 could weigh either amount (is this getting complicated enough?) A pound is equivalent to 453.6 gm, So with pennies made before 1982 it would take 146 pennies to get 454.6 grams... With pennies made after 1982 it would take 182 pennies.
Metal in pennies?
Since 1982, pennies have been 97.5% zinc and 2.5% copper. Before that, they were 95% copper and 5% zinc.
How much is 37 pounds of pennies?
Before 1982, there were 145 pennies in a pound. After 1982, there are 181 pennies per pound. So, doing the math 37 x 145 = 5365 or $53.65 37 x 181 = 6697 or $66.97
What is the percentage of copper are in pennies before 1980?
Pennies minted before 1982 are composed of 95% copper and 5% zinc.
How much does 1000000000 pennies weigh?
It depends if you are talking about pre-1982 pennies or post-1982 pennies.
How much is fifty pounds of pennies in dollars?
Depends on their dates. Pennies before 1982 weigh 3.11 grams. Pennies from 1983 to now weigh 2.5 grams. Pennies dated 1982 could weigh either amount. An ounce equals 28.35 grams. Separate your coins into piles by date and get out your calculator.
How much does copper penny weigh?
Copper pennies minted before 1982 weigh 3.11 grams.
