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  2. Bronze - Wikipedia

    en.wikipedia.org/wiki/Bronze

    The tone ring is a heavy (usually 3 lb; 1.4 kg) folded or arched metal ring attached to a thick wood rim, over which a skin, or most often, a plastic membrane (or head) is stretched – it is the bell bronze that gives the banjo a crisp powerful lower register and clear bell-like treble register. [44]

  3. List of traded commodities - Wikipedia

    en.wikipedia.org/wiki/List_of_traded_commodities

    37,500 lb KC Cotton No.2 ICE: IEPA: 50,000 lb CT Sugar No.11 ICE: IEPA: ... London Metal Exchange: Precious Metals. Commodity Contract size Currency Main exchange

  4. London Bullion Market Association - Wikipedia

    en.wikipedia.org/wiki/London_Bullion_Market...

    In addition to acting as the voice of the global precious metals market, LBMA is the contact point for regulators, investors and clients. LBMA has always worked closely with London Precious Metals Clearing Limited (LPMCL), which organises and co-ordinates bullion clearing and vaulting in London for OTC transactions taking place around the world ...

  5. Prices of chemical elements - Wikipedia

    en.wikipedia.org/wiki/Prices_of_chemical_elements

    While the difficulty of obtaining macroscopic samples of synthetic elements in part explains their high value, there has been interest in converting base metals to gold (Chrysopoeia) since ancient times, but only deeper understanding of nuclear physics has allowed the actual production of a tiny amount of gold from other elements for research ...

  6. Troy weight - Wikipedia

    en.wikipedia.org/wiki/Troy_weight

    Troy weight is a system of units of mass that originated in the Kingdom of England in the 15th century [1] and is primarily used in the precious metals industry. The troy weight units are the grain, the pennyweight (24 grains), the troy ounce (20 pennyweights), and the troy

  7. London bullion market - Wikipedia

    en.wikipedia.org/wiki/London_bullion_market

    The London bullion market is a wholesale over-the-counter market for the trading of gold, silver, platinum and palladium. Trading is conducted amongst members of the London Bullion Market Association (LBMA), tightly overseen by the Bank of England.

  8. Table of specific heat capacities - Wikipedia

    en.wikipedia.org/wiki/Table_of_specific_heat...

    A Assuming an altitude of 194 metres above mean sea level (the worldwide median altitude of human habitation), an indoor temperature of 23 °C, a dewpoint of 9 °C (40.85% relative humidity), and 760 mmHg sea level–corrected barometric pressure (molar water vapor content = 1.16%).

  9. Aluminium - Wikipedia

    en.wikipedia.org/wiki/Aluminium

    According to the International Resource Panel's Metal Stocks in Society report, the global per capita stock of aluminium in use in society (i.e. in cars, buildings, electronics, etc.) is 80 kg (180 lb). Much of this is in more-developed countries (350–500 kg (770–1,100 lb) per capita) rather than less-developed countries (35 kg (77 lb) per ...