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  2. 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 ...

  3. Synthesis of precious metals - Wikipedia

    en.wikipedia.org/wiki/Synthesis_of_precious_metals

    The radioactivity in MBq per gram of each of the platinum group metals which are formed by the fission of uranium. Of the metals shown, ruthenium is the most radioactive. Palladium has an almost constant activity, due to the very long half-life of the synthesized 107 Pd, while rhodium is the least radioactive.

  4. Gold extraction - Wikipedia

    en.wikipedia.org/wiki/Gold_extraction

    Gold extraction is the extraction of gold from dilute ores using a combination of chemical processes. ... Over 10,000,000 pounds (4,500,000 kg) of mercury ...

  5. Cutoff grade - Wikipedia

    en.wikipedia.org/wiki/Cutoff_grade

    The cutoff grade is adapted as the economic environment changes with regard to metal prices and mining costs, and is therefore constantly changing. Metal value is not the only factor affecting the profitability of an ore block. The presence of unwanted material in an ore block may increase the processing cost.

  6. Freight rate - Wikipedia

    en.wikipedia.org/wiki/Freight_rate

    Many shipping services, especially air carriers, use dimensional weight for calculating the price, which takes into account both weight and volume of the cargo. For example, bulk coal long-distance rates in America are approximately 1 cent/ton-mile. [2] So a 100 car train, each carrying 100 tons, over a distance of 1000 miles, would cost $100,000.

  7. Table of specific heat capacities - Wikipedia

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

    The specific heat of the human body calculated from the measured values of individual tissues is 2.98 kJ · kg−1 · °C−1. This is 17% lower than the earlier wider used one based on non measured values of 3.47 kJ · kg−1· °C−1.