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  2. Synthesis of precious metals - Wikipedia

    en.wikipedia.org/wiki/Synthesis_of_precious_metals

    At 3% fission products by weight, one ton of used fuel will contain about 400 grams of rhodium. The longest lived radioisotope of rhodium is 102m Rh with a half-life of 2.9 years, while the ground state (102 Rh) has a half-life of 207 days. [1] Each kilogram of fission rhodium will contain 6.62 ng of 102 Rh and 3.68 ng of 102m Rh.

  3. List of commodities exchanges - Wikipedia

    en.wikipedia.org/wiki/List_of_commodities_exchanges

    The floor of the Chicago Board of Trade, a major commodities exchange in the United States. A commodities exchange is an exchange , or market, where various commodities are traded. Most commodity markets around the world trade in agricultural products and other raw materials (like wheat , barley , sugar , maize , cotton , cocoa , coffee , milk ...

  4. Executive Order 6102 - Wikipedia

    en.wikipedia.org/wiki/Executive_Order_6102

    Executive Order 6102 required all persons to deliver on or before May 1, 1933, all but a small amount of gold coin, gold bullion, and gold certificates owned by them to the Federal Reserve in exchange for $20.67 (equivalent to $502 in 2024) [6] per troy ounce.

  5. Gold code - Wikipedia

    en.wikipedia.org/wiki/Gold_code

    A set of Gold code sequences consists of 2 n + 1 sequences each one with a period of 2 n − 1. A set of Gold codes can be generated with the following steps. Pick two maximum length sequences of the same length 2 n − 1 such that their absolute cross-correlation is less than or equal to 2 ( n +2)/2 , where n is the size of the linear-feedback ...

  6. Metallurgy in pre-Columbian America - Wikipedia

    en.wikipedia.org/wiki/Metallurgy_in_pre...

    South American metal working seems to have developed in the Andean region of modern Peru, Bolivia, Ecuador, Chile, and Argentina with gold and native copper being hammered and shaped into intricate objects, particularly ornaments. [1] [5] Recent finds date the earliest gold work to 2155–1936 BC. [1] and the earliest copper work to 1432–1132 BC.

  7. Kinetic exchange models of markets - Wikipedia

    en.wikipedia.org/wiki/Kinetic_exchange_models_of...

    In the context of kinetic theory of gases, such an exchange model was first investigated by A. Dragulescu and V. Yakovenko. [5] [6] Later, scholars found that in 1988, Bennati had independently introduced the same kinetic exchange dynamics, thus leading to the nomenclature of this model as Bennati-Dragulescu-Yakovenko (BDY) game. [7]