The same as in all silver coins minted in up to 1964 - an alloy of 90% silver and 10% copper.
Due to the rising price of silver, in 1965 the Mint changed the composition of the dime and quarter to a 3-layer "sandwich" consisting of outer layers of 25% nickel / 75% copper bonded to a pure copper core. Halves were changed to outer layers of 80% silver bonded to a core of 40% silver. Unfortunately the price of silver continued to rise and so many halves were melted that they effectively disappeared from circulation. In 1971 the Mint belatedly switch them to the same composition as dimes and quarters but it was too late to restore the denomination.
The new Sacagawea and Presidential Series dollars are made of a manganese-brass-copper sandwich, giving them a golden appearance.
If you mean a US quarter dated 1962 it's not sterling silver, it's coin silver (.900 silver & .100 copper) and value as of today is $3.25 just for the silver
A Quarter of 12 is 12 * (1/4) = 3. This is not generally used when you speak about time.Whereas, Quarter to 12 is used frequently and means that 15 minutes are left for the clock to strike 12 am/pm.So, quarter to 12 is correct and is used.
Pre-1965 silver quarters are 90% silver with a total weight of 6.25 grams, which is then 5.625 grams of silver per quarter.
About $3 for its metal content. A scrap dealer will pay wholesale, though
All silver Washington quarters have the same amount of silver it's .18084oz of pure silver
All US quarters produced in 1962 were composed of 90% silver and 10% copper.
value
If you mean a US quarter dated 1962 it's not sterling silver, it's coin silver (.900 silver & .100 copper) and value as of today is $3.25 just for the silver
England lost to Brazil in the quarter finals
A Quarter of 12 is 12 * (1/4) = 3. This is not generally used when you speak about time.Whereas, Quarter to 12 is used frequently and means that 15 minutes are left for the clock to strike 12 am/pm.So, quarter to 12 is correct and is used.
materials used in carinosa
Pre-1965 silver quarters are 90% silver with a total weight of 6.25 grams, which is then 5.625 grams of silver per quarter.
Manganin used for standard materials...
Halochromic materials are used for stuff :P
Dental materials are examples of materials that are used to make impressions.
Carbon dating can be used to date organic materials that were once part of a living organism, such as wood, bone, charcoal, and plant remains. It is most commonly used on objects that are less than 50,000 years old.
About $3 for its metal content. A scrap dealer will pay wholesale, though