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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.
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What is a penny's specific heat capacity?
Specific heat capacity is heat capacity per unit mass. So it depends on the exact alloy composity of your penny, and not on its size.In a typical US post-1962 penny, the specific heat capacity is about .39 kJ/kgKIn a US penny from 1864-1962, the specific heat capacity would be a little less than this. The same was true from 1837-1857.From 1793-1837, the specific heat capacity was about .39 kJ/kgK.
What is ex-post-facto design?
Ex Post Facto (also called Causal Comparative Research) is useful whenever: • We have two groups which differ on an independent variable and we want to test hypotheses about differences on one or more dependent variables OR • We have two groups which already differ on a dependent variable and we want to test hypotheses about differences on one or more independent variables
When during the day do you find?
post a complete thought and you might get an answer
Which of these has been independent of congressional control since 1970?
Post offices.
What is another name for an inclined plane wrapped around a post?
a screw.
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.
What is the formula for the post-1982 penny?
If by formula you mean composition, a post-1982 penny is 97.5% Zinc and 2.5% Copper by mass.
What percent copper is a 1984 penny?
Next to none. Post-1982 pennies are only plated with copper, they are mostly zinc. The amount of copper on a post-1982 penny is miniscule and costs more to remove than melt value is.
What is a post 1982 penny made of?
A post-1982 penny is made of 97.5% zinc and 2.5% copper. The composition changed from primarily copper to primarily zinc in order to reduce production costs.
What is the density of a post 1982 penny?
The density of a post-1982 penny, which is made of 97.5% zinc and 2.5% copper, is around 6.99 g/cm^3.
What makes a penny turn silver?
A penny can turn silver due to a chemical reaction called oxidation. When exposed to certain conditions, such as being in contact with acidic substances or moisture, the copper in the penny reacts with oxygen in the air to form copper oxide, which gives the penny a silver appearance.
When was the penny post invented?
the penny post was invented in 1888
What percentage of copper is a penny post 1982 but before this new zinc one?
The switch to zinc was made over the course of 1982, so there's no third variety in the middle.
What is the metal used to make a penny?
Pennies in the United States are made of copper-plated zinc. The composition of a modern penny is 97.5% zinc and 2.5% copper.
Is a US penny copper?
Pre-1982 pennies are made of bronze, which is 95% copper plus 5% tin and/or zinc. Post-1982 pennies are zinc with a thin coating of copper.
Wheat penny value?
Wheat penny's range in value from one cent to more than $1,000.00. Please be more specific and post new question.
What is a penny that's not a wheat penny from 1940 worth?
If it's not a Wheat penny, it's not a US coin. A lot more information is needed, post new question.
