# Does the average density of a penny change before and after 1982?

Answer: The pennies minted before 1982 are denser than the pennies minted after 1982. The density of pennies minted in 1982 falls between the other two groups. The composition of the penny was probably changed in 1982 in a way that made it less dense.

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).

Secondly, what is the density of a penny after 1983? 7.18 g/cm3

Beside above, what is the density of a penny?

Pennies are 97.6 percent zinc and 2.4 percent copper, giving them a density of 7.15 g/cc – the lowest of any US penny.

Why did the density of pennies change?

Different metals change the mass of a penny because they have different densities. During World War 2, a copper shortage caused pennies to be made mostly of zinc. And finally, the ratio of copper to zinc was changed in 1982, again changing the mass of a penny.

### Why are pre 1982 pennies denser?

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.

### Can you determine if a penny was minted before 1982?

If your Lincoln Memorial penny has a date before 1982, it is made of 95% copper. If the date is 1983 or later, it is made of 97.5% zinc and plated with a thin copper coating. For pennies dated 1982, when both copper and zinc cents were made, and best way to determine their composition is to weigh them.

### How much volume is a penny?

05 inches) for the thickness. VOLUME = 360 cubic millimeters = . 360 cubic centimeters.

7.2 g/mL

### How do you measure the volume of a penny?

The first way is to treat a penny like a small cylinder and calculate the volume based on its linear measurements — that is, multiply the radius by itself, take that number and multiply it by pi and, finally, multiply the result by the penny’s estimated thickness.

### What metals are in a penny?

The alloy remained 95 percent copper and 5 percent zinc until 1982, when the composition was changed to 97.5 percent zinc and 2.5 percent copper (copper-plated zinc). Cents of both compositions appeared in that year. The penny’s original design was suggested by Ben Franklin.

### What is the mass of 5 pennies?

The mass of a penny was 3.1 grams before 1982, but a penny after 1982 weighs 2.5 grams. According to the mint, from the United States Treasury website, to find out the mass of a penny, it also gave the mass as 2.5 grams. So I decided to go out on my own and measure different pennies from different years.

2.5 grams

### What makes a penny valuable?

Just 40 of the coins — probably created by accident, on copper-alloy one-cent blanks left in the presses in the wartime years when pennies were converted to steel — are known to exist. The first 1943 copper cent was sold in 1958 for more than \$40,000. In 1996, another went for a whopping \$82,500.

### What is the densest coin?

Both metals have a theoretical density that is slightly above 22.5g/cc, making them the densest elements in existence. The osmiridium coins will be the first-ever precious metal coins that can be traded with absolute confidence between people with no special analytical knowledge.

### What is density measured in?

Density is the mass of an object divided by its volume. Density often has units of grams per cubic centimeter (g/cm3). Remember, grams is a mass and cubic centimeters is a volume (the same volume as 1 milliliter).

### What is the density of a nickel?

Density of Nickel [Ni] Nickel weighs 8.908 gram per cubic centimeter or 8 908 kilogram per cubic meter, i.e. density of nickel is equal to 8 908 kg/m³; at 20°C (68°F or 293.15K) at standard atmospheric pressure.

### What does it mean when you find a penny?

It represents new beginnings, the start of a new chapter and a fresh start. It all depends on what you believe, of course. So, the next time you see a penny from Heaven in the course of your next stroll, be sure to pick it up. It may or may not bring you luck but, hopefully, it will bring a smile to your face.

### How do you know if a penny is copper?

The way to detect if your 1943 penny is made out of copper is by using a magnet. If the penny sticks to the magnet, it is made out of steel — not copper. Keep your eyes open for this rare penny — and you could be up to \$200,000 richer if you find it.