Present day nickel, dimes and quarters are composed of copper and nickel.
Post-1964 quarters contain 91.67% Copper and 8.33% Nickel. Quarters dated 1964 and earlier contain 90% Silver and 10% Copper.
Current US dimes are made of a "sandwich" composite consisting of a solid copper core clad in outer layers of an alloy of 25% nickel and 75% copper, for an overall mix of roughly 92% copper and 8% nickel. Until 1964 US dimes, quarters, half dollars and dollars were struck in an alloy of 90% silver and 10% copper. Except during WWII, US nickels have always been made of the same 25% nickel / 75% copper alloy, but they're solid metal rather than clad.
All Indian head (a/k/a buffalo) nickels were struck in the same alloy of 75% copper / 25% nickel that has been used for all 5-cent pieces except the famous "war nickels" made during WW 2. The latter were made of silver,copper, and manganese to save nickel for the war effort.
Actually, only the lower three strings of guitars contain copper or nickel. These strings are wound, meaning that a core string (usually steel) is taken, and wire (usually nickel or copper) of varying gauge, depending on the thickness of string wanted, is wound around it. The higher three are just steel wire. As for why nickel and copper are used, it's because they are cheap and sound good.
Present day nickel, dimes and quarters are composed of copper and nickel.
Post-1964 quarters contain 91.67% Copper and 8.33% Nickel. Quarters dated 1964 and earlier contain 90% Silver and 10% Copper.
At present the nickel is 25% nickel and 75% copper. This mix may change since nickels contain more the 6 cents worth of metal.
erm....nickel Not quite ... US nickels are actually made from an alloy of only 25% nickel, the rest is copper. Canadian nickels were once pure nickel, but in recent years they've been made of steel because the price of nickel rose to the point where the amount needed would cost more than five cents. Copper. The mix is 75% copper and 25% nickel.
Current US dimes are made of a "sandwich" composite consisting of a solid copper core clad in outer layers of an alloy of 25% nickel and 75% copper, for an overall mix of roughly 92% copper and 8% nickel. Until 1964 US dimes, quarters, half dollars and dollars were struck in an alloy of 90% silver and 10% copper. Except during WWII, US nickels have always been made of the same 25% nickel / 75% copper alloy, but they're solid metal rather than clad.
In 1903, the U.S. penny was made of bronze, which is an alloy of copper (95%) and tin (5%). The penny continued to be made of bronze until 1982 when it was switched to a copper-plated zinc composition.
All Indian head (a/k/a buffalo) nickels were struck in the same alloy of 75% copper / 25% nickel that has been used for all 5-cent pieces except the famous "war nickels" made during WW 2. The latter were made of silver,copper, and manganese to save nickel for the war effort.
That date is still found in circulation today and is face value. With the exception of the war years(1942-1945) all US Nickels from 1866 to date are made from a alloy of .750 copper and .250 nickel.
The dollar bills are made of cotton and linen, despite the fact that we call it paper money. Pennies are zinc coated with copper. Nickels, quarters, and dimes are a mix of nickel and copper.
Actually, only the lower three strings of guitars contain copper or nickel. These strings are wound, meaning that a core string (usually steel) is taken, and wire (usually nickel or copper) of varying gauge, depending on the thickness of string wanted, is wound around it. The higher three are just steel wire. As for why nickel and copper are used, it's because they are cheap and sound good.
You can create a mixture of vinegar and salt to help remove grime from a copper penny. Simply soak the penny in the mixture for a few minutes, then gently rub it with a soft cloth or brush to help lift off the grime. Rinse with water and dry thoroughly.
A Penny is not a compound. It's just one word.