5.5 grams/cm3
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.
Probably the 1982 penny if it's a copper version.
Density is 7.18 g/ml for post 1982 which is quite close to that of Zinc density of 7.14 g/ml. This makes some sense since the coin is 97.5 % Zinc and 2.5 % copper with a density of 8.92g/ml. The mass is: 3.11 grams [pre 1982] 2.50 grams [post 1982] The findings of a physics class: I calculated it in my physics lab with a group of students - To attempt to approximate for the different amount of nickel found in a penny past 1998, we took the avg of ten coins for thickness and mass. The density was found to be equal to 6.60 grams/centimeters cubic (approximately).
7.18g/ml
5.5 grams/cm3
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.
A penny has more density.
Probably the 1982 penny if it's a copper version.
Density is 7.18 g/ml for post 1982 which is quite close to that of Zinc density of 7.14 g/ml. This makes some sense since the coin is 97.5 % Zinc and 2.5 % copper with a density of 8.92g/ml. The mass is: 3.11 grams [pre 1982] 2.50 grams [post 1982] The findings of a physics class: I calculated it in my physics lab with a group of students - To attempt to approximate for the different amount of nickel found in a penny past 1998, we took the avg of ten coins for thickness and mass. The density was found to be equal to 6.60 grams/centimeters cubic (approximately).
7.18g/ml
8.96
Many countries use a penny as a minor currency unit and it is likely that each one of these has a different density.
The density of a penny is higher.
A penny
If by formula you mean composition, a post-1982 penny is 97.5% Zinc and 2.5% Copper by mass.
Light a Penny Candle was created in 1982.