- 行业: Mining
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The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...
The electric current that, when passed through a solution of silver nitrate in water, will deposit silver at the rate of 0.001118000 g/s. The unit of current in common use.
Industry:Mining
The electrical resistivity of coal appears to decrease with ash content. The laterlog measures what is virtually the true resistivity of the coal and may ultimately provide information on seam quality. The laterlog uses a sheet of current that is focused on each formation in succession and so measures the resistivity of that formation only. The mud column or a salty mud has no effect on the measured resistivity. The laterlog may be measured by a seven- or three-electrode arrangement but the former is preferred.
Industry:Mining
The electrode potential measured when no current is flowing between the electrode and the electrolyte.
Industry:Mining
The electrode where electrons enter, or current leaves, an operating system, such as a battery, an electrolytic cell, an X-ray tube, or a vacuum tube. In the first of these, the cathode is positive; in the other three, negative. In a battery or electrolytic cell, it is the electrode where reduction occurs. Opposite of anode.
Industry:Mining
The electromotive force generated in a circuit containing two dissimilar metals when one junction is at a different temperature from the other.
Industry:Mining
The electromotive force set up between the two sides of the sheet when an electrolyte is forced through a sheet of some pervious solid dielectric. This electromotive force is proportional to the pressure and to the electrical resistivity of the liquid, and inversely proportional to its viscosity.
Industry:Mining
The element formed when a radioactive element undergoes radioactive decay. The latter is called the parent. The daughter may or may not be radioactive.
Industry:Mining
The element having the atomic number 97, the discovery of which was announced by Thompson, Ghiorso, and Seaborg in 1950. They produced an isotope of 4.5 h half-life, berkelium 243, by helium ion bombardment of americium 241. Symbol, Bk; valences, 3 and 4; and the mass number of the most stable isotope, 249.
Industry:Mining
