- 行业: Mining
- Number of terms: 33118
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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 ...
A state where different ions are distributed randomly in identical structural positions. Compare: crystal defect; volume defect
Industry:Mining
A statement describing the scope and duty of a plant in terms, e.g., of the tonnage of coal treated per hour, the processes used, the separations effected and sizes produced; sometimes also used to express the results of plant operation.
Industry:Mining
A statement in dynamics that a body at rest remains at rest and a body in motion remains in uniform motion in a straight line unless acted upon by an external force. The acceleration of a body is directly proportional to the applied force and is in the direction of the straight line in which the force acts. For every force there is an equal and opposite force or reaction.
Industry:Mining
A statement in physics that the velocity of flow of a liquid through a capillary tube varies directly as the pressure and the fourth power of the diameter of the tube and inversely as the length of the tube and the coefficient of viscosity.
Industry:Mining
A statement of elastic deformation, that the strain is linearly proportional to the applied stress.
Industry:Mining
A statement of equality between two ratios. When one ratio is equal to another ratio, they are said to be in proportion.
Industry:Mining
A statement or statements of the symmetrical relationships between the members of a twin crystal, e.g., the twin plane or the twin axis that resolves one crystal individual into congruity with another in a twin crystal. The twin law cannot be an element of symmetry 3418 of the point group of the twin parts, although it may be an element in a point group with higher symmetry in the same crystal system.
Industry:Mining
A statement which is prepared by a Federal agency with regard to a permit, and is required under the National Environmental Policy Act (NEPA). The EIS may include but is not limited to information relating to the purposes and needs to which the agency is responding by the preparation of the EIS, alternatives, and the environmental consequences which may arise from the proposed action.
Industry:Mining
A static tube has a shaped, solid nose, on the downstream side of which a number of small holes are positioned around the circumference. The holes are so placed that the pressure in the tube is that of the undisturbed airstream. Unlike the Pitot tube, the measured pressure is affected considerably both by the position of the stem of the tube in relation to the pressure holes, and by the distance between the holes and the nose tip. The static tube is considerably more sensitive to yaw than is the Pitot tube.
Industry:Mining
A station for which tidal constants have previously been determined and that is used as a standard for the comparison of simultaneous observations at a second station; also, a station for which independent daily predictions are given in the tide or current tables from which corresponding predictions are obtained for other stations by means of differences or factors.
Industry:Mining
