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Permeability of vacuum
| Глоссарий физических констант |
Mр
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Магнитная постоянная, русский
- 4p×10-7
- 1.257•10іц h/m
- , коэффициент ?0 = 4??10-7 гн/м = 1,256637?10-6 гн/м, входящий в некоторые уравнения магнетизма и электромагнетизма при записи их в рационализированной форме (в единицах си); ?0 иногда называют магнитной проницаемостью вакуума.
- Постоянная, равная в си 4?•10-7 гн/м.
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Permeability, английский
- Perméabilité
- The ease with which a fluid flows through a porous material (wood) in response to pressure.
- A measure of the ease with which water penetrates a material.
- The relationship of flow per unit area to differential pressure across a filter medium.
- (of a membrane) the ability to allow some substances to pass through
- Проницаемость о ~ to heat теплопроницаемость ~ of soil проницаемость грунта air ~ воздухопроницаемость
- The state or quality of being penetrable by fluids or gases.
- The specific permeability, k (in m? ) is often referred to simply as
- The capacity of a solid substance (such as rock) to transmit a fluid. the degree of permeability depends on the number, size, and shape of the pores and/or fractures in the rock and their interconnections. it is measured by the time it takes a fluid of standard viscosity to move a given distance. the unit of permeability is the darcy.
- The capacity of a porous rock to transmit fluids.
- A measure of a material’s ability to align its magnetic domains in response to an applied magnetic field.
- A measure of the ease with which a fluid flows through the connecting pore spaces of rock or cement. the unit of measurement is the millidarcy.
Permeability, английский
Permeability (mt), английский
- The ease with which a magnetic field or flux can be set up in a magnetic circuit. it is not a constant value for a given material but is a ratio. at any given value of magnetizing force, permeability is b/h the ratio of flux density, b, to magnetizing force h.
- The ease with which a material can become magnetized. it is the relationship between field strength and the magnetizing force.
Permeability coefficient, английский
Permeability creation, английский
The action of various engineering techniques to create fluid pathways within rock, such as fracture enhancement or creation by hydraulic pressure or imposed temperature differential.
Permeability pathway, английский
Permeability resistance ratio, английский
Coefficient de perméabilité
Permeability resistance ratio, английский
Permeability test, английский
- A test to determine movement through concrete of water under pressure.
- A procedure usually followed to determine the watertightness of the foundation and abutment rocks, as one phase of foundation test drilling done before the construction of dams. the test is performed by placing packer assemblies in diamond-drill holes to segregate each successive different stratum or each 5-foot depth, and water is injected into the borehole space between the packers with a high-pressure pump. the volume of water escaping into the rocks is a measure of the permeability, indicating the amount of water that will seep through the foundation or abutment of the dam and whether or not the dam foundation should be grouted.
Vacuum, английский
- Вакуум - ценовой интервал, в котором может быть идентифицирована общая нехватка интереса к покупке или продаже;
- Вакуум
- Вакуум v-cm visual countermeasures помехи визуальным средствам (наблюдения), средства ослепления (наблюдателей противника)
- A space which is completely empty of all matter, including air
- Вакуумцвакуумный
- A space utterly empty, even of air or vapour.
- Вакуум; разряжение
- The lower than atmospheric pressure that exists in the intake manifold when the engine is running. on most cars, engine vacuum is used to operate a variety of components and systems.
- Space that is at a pressure below atmospheric pressure.
Vacuum - pressure rolling, английский
Vacuum advance, английский
Mechanical
Vacuum assisted brake, английский
Hydraulic brake actuated or assisted by atmospheric pressure, usually through mechanical linkages. also air
Vacuum bagging, английский
Формование методом вакуумного мешка
Vacuum box, английский
Device used to create a differential pressure over an isolated area of a weld or of a pressure boundary that cannot be directly pressurized.
Vacuum box leak testing, английский
Technique of bubble testing where a vacuum box is used to create a pressure differential across a boundary. a viewing window allows observation of bubble formation within the solution film.
Vacuum brake, английский
See the brakes page.
Vacuum brazing, английский
Vacuum breaker, английский
A backflow preventer which prevents a vacuum in a water-supply system from causing backflow. of a window; may provide lighting in the upward and/or downward direction.
Vacuum breaker., английский
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Avogadro constant, английский
Na
Proton mass, английский
Mp
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