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United States Bureau of Mines
行业: Mining
Number of terms: 33118
Number of blossaries: 0
Company Profile:
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 ratio of the power output to the total power input.
Industry:Mining
The ratio of the product of the activities of the ions produced from a given substance to the activity of the undissociated molecules of that substance.
Industry:Mining
The ratio of the sum of the individual maximum loads during a period to the simultaneous maximum loads of all the same units during the same period. Always unity or more.
Industry:Mining
The ratio of the ultimate breaking strength of the material to the force exerted against it. If a rope will break under a load of 6,000 lb (2,724 kg), and it is carrying a load of 2,000 lb (908 kg), its factor of safety is 6,000/2,000 = 3, or f.s 3.
Industry:Mining
The ratio of the volume at atmospheric pressure of the gas developed by an explosive to the volume of the solid from which it was formed. Many commercial explosives have a gas ratio of about 8. Ammonium nitrate plus fuel oil has a ratio of about 20.
Industry:Mining
The ratio of the volume of air space to the total volume of voids in a soil mass.
Industry:Mining
The ratio of the volume of open pore space in a specimen to the exterior volume.
Industry:Mining
The ratio of the volume of space above a piston at the bottom of its stroke to the volume above the piston at the top of its stroke.
Industry:Mining
The ratio of the volume of water that a given body of rock or soil will hold against the pull of gravity to the volume of the body itself. It is usually expressed as a percentage. Compare: field capacity
Industry:Mining
The ratio of the volume of water that a given mass of saturated rock or soil will yield by gravity to the volume of that mass. This ratio is stated as a percentage. Compare: effective porosity
Industry:Mining
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