8.83 g/cm3
Given the densities and compositions of the pure metals, pennies minted between 1962 and 1981 (old) have a density of 8.83 g/cm3. Pennies minted after 1983 (new) have a density of 7.18 g/cm3.
What is the density of a penny mL?
8.96 g/mL
According to the US Mint (), pennies minted before 1982 are made of copper. Copper has a density of 8.96 g/mL. Compare the density you calculated for pennies minted before 1982 to this accepted density.
Whats the density of pennies before 1982?
The density of pennies made before 1982 was measured to be 8.79 g/mL, while the density of pennies made after 1982 was measured at 6.90 g/mL.
Why are older pennies more dense?
The new penny looked identical to the previous coins but it was cheaper to produce. While the new penny was the exact same size as the old one, it weighed less because zinc is slightly less dense than copper. The change from copper to zinc took place in 1982.
Could density determinations establish that a penny is made of pure copper?
Pennies minted prior to 1982 should have a density almost the same as pure copper (8.96 g/cm3) while pennies minted after 1982 should have a density almost the same as pure zinc (7.14 g/cm3).
What is the volume of a pre 1982 penny?
We used one and obtained a value of 1.27 mm (or . 05 inches) for the thickness. VOLUME = 360 cubic millimeters = . 360 cubic centimeters.
What should the density of a penny be?
Pennies minted prior to 1982 should have a density almost the same as pure copper (8.96 g/cm 3) while pennies minted after 1982 should have a density almost the same as pure zinc (7.14 g/cm 3).
What is the theoretical density of mild steel?
The theoretical density of mild steel (low-carbon steel) is about 7.87 g/cm 3 (0.284 lb/in 3 ). Density of carbon steels, alloy steels, tool steels and stainless steels are shown below in g/cm 3, kg/m 3 and lb/in 3. Density: The density of a material is the mass contained in a unit volume.
Why was the Penny made out of steel in 1943?
In 1943 the penny was made out of zinc plated steel to save copper for the war effort which is why most 1943 pennies are silver colored. Metal was not the only commodity that was critical to the war effort.
What kind of metal is in a penny?
Penny Composition Penny Metal Composition by Year: 1793-1837 – Pure copper. 1837-1857 – Bronze (95% copper, 5% mixture of tin and zinc).
