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When 12 copper pennies are submerged in water the pennies displace 4.13 cm3 of water If the combined mass of the pennies is 36.93 g what is the density of copper?
The density of copper is 8.94 g/cm3. This can be calculated by dividing the total mass of the pennies (36.93 g) by the total volume they displace (4.13 cm3). This gives the density of copper as 8.94 g/cm3.
Why do older pennies weigh more than young ones?
Older pennies weigh more because they were made using a higher percentage of copper in their composition, whereas newer pennies have a lower percentage of copper and are mostly made of zinc. The difference in composition accounts for the difference in weight between old and new pennies.
Why are new pennies magnetic but old one not?
What country are you talking about? New U.S. cents are not magnetic; they're made of copper-plated zinc. The only magnetic U.S. cents were the steel ones minted during 1943 so copper could be used in ammunition. New Canadian cents and British pennies are magnetic because they're made of copper-plated steel. The price of copper went up so much that it cost more than a penny to mint the coins, so the governments were losing money on each one. They switched to steel as a cheaper alternative.
How much does 38000 copper pennies weigh?
38000 copper pennies would weigh approximately 94.7 kilograms or 209 pounds.
Why do the new pennies have less mass than the old pennies?
The new pennies have less mass because they are now mostly made of zinc with a thin copper coating, while the old pennies were made of bronze. The change was made to reduce production costs and to make the coins more affordable to produce.
Why are modern day pennies still coated in copper?
to keep tradition of the pennies
Are there any 1943 copper pennies still out there?
yes I have 1 1943 copper pennies, but if you find one make sure it is not a 1948 with the 8 cut down and yes its a copper pennies
What is 800 pounds of pennies worth?
That will depend upon the pennies being weighed. Uncirculated copper pennies minted 1909 to 1982 (not including zinc 1943) are heavier than the new zinc pennies that started in 1983. Fifty pounds of the old copper pennies would be about $72.50. Fifty pounds of the new zinc pennies would be about $90.00.
Does a penny have gold?
No, pennies do not contain gold. Modern pennies are mostly zinc with a little copper, older pennies are mostly copper with a little zinc.
What is the importance of copper?
copper is important because it makes pennies and pennies are good
What are new pennies made of?
Since 1982, US pennies have been made of zinc with a thin copper coating. The specific percentages are 97.5% zinc and 2.5% copper.
How many copper pennies equal a pound?
240 copper pennies equal a pound.
What material is use to make pennies?
copper. That is why they call them copper pennies. There is also a zinc coating on the pennies be more specific dude
How many new pennies make a pound of copper?
One modern cent weighs 2.5 grams and contains 2.5% copper, which is 0.0625 grams or about 0.000138 lbs of copper per penny. To get one full pound of copper, it would take 7,246 pennies.
When 12 copper pennies are submerged in water the pennies displace 4.13 cm3 of water If the combined mass of the pennies is 36.93 g what is the density of copper?
The density of copper is 8.94 g/cm3. This can be calculated by dividing the total mass of the pennies (36.93 g) by the total volume they displace (4.13 cm3). This gives the density of copper as 8.94 g/cm3.
What are you S Pennies made of?
Pennies today are made of 97.5% zinc and 2.5% copper.
Why were bronze pennies discontinued?
The cost of minting them. Today's pennies are zinc (cheap) coated with a copper wash, and still cost more to make than they are worth.
