- 行业: Printing & publishing
- Number of terms: 178089
- Number of blossaries: 0
- Company Profile:
McGraw Hill Financial, Inc. is an American publicly traded corporation headquartered in Rockefeller Center in New York City. Its primary areas of business are financial, publishing, and business services.
The nasal cavities and the structures surrounding and associated with them. The nose functions primarily as the organ of smell and in most tetrapods also assumes a respiratory function, forming the anterior end of the air passage through which air is drawn in and in which it is warmed and moistened.
Industry:Science
The process of increasing the water-vapor content (humidity) of a gas. This process and its reverse operation, dehumidification, are important steps in air conditioning for human comfort and in many industrial operations. For a discussion of the dehumidification of gases, with the exception of air,
Industry:Science
The technical and mechanical activities involved in removing coal from the earth and preparing it for market. Coal mining in the industrialized countries is characterized by the integration of a number of complex systems into a production methodology that varies for surface versus underground mining.
Industry:Science
The protection of wire and optical communications systems equipment and service from electrical disturbances. This includes the electrical protection of lines, terminal equipment, and switching centers, and inductive coordination, or the protection against interference from nearby electric power lines.
Industry:Science
The ratio of the average mass per formula unit of the natural nuclidic composition of a substance to 1/√<span style="border-top:1px solid black;">12</span> of the mass of an atom of nuclide <sup>12</sup>C. For example, μ(KCl) = 74.555. Relative molecular mass replaces the concept of molecular weight.
Industry:Science
The removal or diminution of a magnetic field applied to a magnetic substance when the latter has been thermally isolated from its surroundings. The process concerns paramagnetic substances almost exclusively, in which case a drop in temperature of the working substance is produced (magnetic cooling).
Industry:Science
The net transfer of electric charge per unit time. It is usually measured in amperes. The passage of electric current involves a transfer of energy. Except in the case of superconductivity, a current always heats the medium through which it passes. For a discussion of the heating effect of a current
Industry:Science
The statement that the current <i>I</i> flowing in an electrical circuit is often, to a very good approximation, proportional to the voltage <i>V</i> of its source; that is, <i>V</i> = <i>IZ</i>. If the current is steady direct current (DC), <i>Z</i> equals the total resistance of the circuit, <i>R</i>.
Industry:Science
The principle that when gases take part in chemical reactions the volumes of the reacting gases and those of the products, if gaseous, are in the ratio of small whole numbers, provided that all measurements are made at the same temperature and pressure. The law is illustrated by the following reactions:
Industry:Science
The recent discovery of neutrino oscillations, found in studies of atmospheric neutrinos, shows that neutrinos have a nonzero mass. The long-standing question of whether or not neutrinos have finite masses has finally been answered. Previously, there had been no firm evidence that neutrinos possess mass.
Industry:Science
