Polyimide powder can be used to produce parts and shapes by sintering technologies (hot compression molding, direct forming, and isostatic pressing). Because of their high mechanical stability even at elevated temperatures they are used as bushings, bearings, sockets or constructive parts in demanding applications.
The quarter, short for quarter dollar, is a United States coin worth 25 cents, one-fourth of a dollar. It has a diameter of.955 inches and a thickness of.069 inches. The coin sports the profile of George Washington on its obverse, and its reverse design has changed frequently. It has been produced on and off since 1796, and consistently from 1831 onward. The choice of 1â4 as a denominationâas opposed to the 1â5 more common elsewhereâoriginated with the practice of dividing Spanish ...
A 25 cent quarter dated 1964 or before has 18% oz pure silver. A 50 cent half dollar dated 1964 or before has 36% oz pure silver. A $1 dollar dated 1935 or before has 77% oz pure silver. A 5 cent war nickle dated 1942 to 1945 has 5.62% oz pure silver. A 50 cent Kennedy half dated 1965 to 1970 has 14.79% oz pure silver. HOW TO FIGURE WHAT THE SILVER CONTENT OF YOUR COIN IS WORTH: Find the current market price for silver, Today the silver spot price is $12.55 / oz. Multiply the current price by the silver content of your coin.