Propagation of seismic-induced electromagnetic waves in a
... frequency, while the shape of the imaginary component is given by the Lorentzian. The shapes of these components resemble those around the 24 Hz peak shown in Figure 4. The elastic wave equation coupled with the fluid viscous motion describes coupled nearest-neighbor springs–instead of an isolated s ...
... frequency, while the shape of the imaginary component is given by the Lorentzian. The shapes of these components resemble those around the 24 Hz peak shown in Figure 4. The elastic wave equation coupled with the fluid viscous motion describes coupled nearest-neighbor springs–instead of an isolated s ...
Electrokinetics at Aqueous Interfaces without Mobile - ENS-phys
... 5a of the shear stress tensor is zero. In a polar fluid, the part Π interaction between two points in the fluid is not only modeled via the internal force vector and the associated stress tensor, but also via the torque per unit mass ΓBint. Equivalent to Cauchy’s stress 5 for which principle for the ...
... 5a of the shear stress tensor is zero. In a polar fluid, the part Π interaction between two points in the fluid is not only modeled via the internal force vector and the associated stress tensor, but also via the torque per unit mass ΓBint. Equivalent to Cauchy’s stress 5 for which principle for the ...
ON THE ORIGIN OF THE INERTIA
... the velocity of matter at distance r and τ is a constant. Sciama starts with the assumption of Mach’s principle, that is, the inertial forces are caused by other matter in the universe. It seems reasonable to suppose that this influence will be proportional to the mass–energy density of the universe ...
... the velocity of matter at distance r and τ is a constant. Sciama starts with the assumption of Mach’s principle, that is, the inertial forces are caused by other matter in the universe. It seems reasonable to suppose that this influence will be proportional to the mass–energy density of the universe ...
Lecture 1 - The Local Group
... c. 1750 - B. Franklin: lightning=electricity, same as rubbed glass. A single kind of charge “fluid” (not two; now we know that electrons are “flowing”). 1785 - Charles Coulomb => electric force follows inverse square law 1819 - Hans Oersted: compass needles deflected when near a wire carrying an ele ...
... c. 1750 - B. Franklin: lightning=electricity, same as rubbed glass. A single kind of charge “fluid” (not two; now we know that electrons are “flowing”). 1785 - Charles Coulomb => electric force follows inverse square law 1819 - Hans Oersted: compass needles deflected when near a wire carrying an ele ...
Magnetic field of a coil or solenoid
... When the external magnetic field is removed, this orientation may disappear in a short period of time in temporary magnets. (e.g. magnets made of iron).In permanent magnets, they remain for a long period of time. (e.g. magnets made of steel and alloys) All magnets have two poles so they are calle ...
... When the external magnetic field is removed, this orientation may disappear in a short period of time in temporary magnets. (e.g. magnets made of iron).In permanent magnets, they remain for a long period of time. (e.g. magnets made of steel and alloys) All magnets have two poles so they are calle ...
The Multipole Moments
... We have expressed all quantities of interest with respect to the metric components. On the other hand the metric can be expressed in terms of the multipole moments. ...
... We have expressed all quantities of interest with respect to the metric components. On the other hand the metric can be expressed in terms of the multipole moments. ...
19.1 Magnets, Magnetic Poles, and Magnetic Field Direction 19.2
... 19.5 Applications: Current-Carrying Wires in Magnetic Fields ...
... 19.5 Applications: Current-Carrying Wires in Magnetic Fields ...
Notes & ConcepTests
... also varies with time, such that B(t) = B0t. What is the magnitude of the induced e in the loop? What is the magnitude of the induced electric field? If the loop were conducting, what direction would the induced current flow? ...
... also varies with time, such that B(t) = B0t. What is the magnitude of the induced e in the loop? What is the magnitude of the induced electric field? If the loop were conducting, what direction would the induced current flow? ...
Electric Potential Energy
... The earth has a gravitational field around it, caused by its mass. This means that objects with mass are attracted to it gravitationally. Objects farther away from the earth, will still feel attracted to it, but they won’t feel that attraction with the same intensity. Objects closer to the earth wit ...
... The earth has a gravitational field around it, caused by its mass. This means that objects with mass are attracted to it gravitationally. Objects farther away from the earth, will still feel attracted to it, but they won’t feel that attraction with the same intensity. Objects closer to the earth wit ...
Experiment III – Electric Flux
... When a charge distribution is symmetrical, we can use Gauss’ Law, a special law for electric fields. The Gauss’ Law method of determining the electric field depends on the idea of electric flux. We can think of electric flux as the number of electric field lines passing through some surface area. Fo ...
... When a charge distribution is symmetrical, we can use Gauss’ Law, a special law for electric fields. The Gauss’ Law method of determining the electric field depends on the idea of electric flux. We can think of electric flux as the number of electric field lines passing through some surface area. Fo ...
General formula for symmetry factors of Feynman diagrams
... is no permutation in the vertex of type (a2 ) (figure 2.b) having only one leg. Second, according to Wick’s theorem, each vertex of type (a1 ) has three different fields with possibility of contraction with internal fields of other vertices or external fields. These three contractions present as thr ...
... is no permutation in the vertex of type (a2 ) (figure 2.b) having only one leg. Second, according to Wick’s theorem, each vertex of type (a1 ) has three different fields with possibility of contraction with internal fields of other vertices or external fields. These three contractions present as thr ...
coronal closure of subphotospheric mhd convection for the quiet sun
... is larger than in these two regions, and it allows the transfer of flux, helicity, and energy, between them, with the key quantity controlling this process being the parallel component of the electric field. With respect to our initial approach, we keep the full MHD model for describing the corona, ...
... is larger than in these two regions, and it allows the transfer of flux, helicity, and energy, between them, with the key quantity controlling this process being the parallel component of the electric field. With respect to our initial approach, we keep the full MHD model for describing the corona, ...
Field (physics)
In physics, a field is a physical quantity that has a value for each point in space and time. For example, on a weather map, the surface wind velocity is described by assigning a vector to each point on a map. Each vector represents the speed and direction of the movement of air at that point. As another example, an electric field can be thought of as a ""condition in space"" emanating from an electric charge and extending throughout the whole of space. When a test electric charge is placed in this electric field, the particle accelerates due to a force. Physicists have found the notion of a field to be of such practical utility for the analysis of forces that they have come to think of a force as due to a field.In the modern framework of the quantum theory of fields, even without referring to a test particle, a field occupies space, contains energy, and its presence eliminates a true vacuum. This lead physicists to consider electromagnetic fields to be a physical entity, making the field concept a supporting paradigm of the edifice of modern physics. ""The fact that the electromagnetic field can possess momentum and energy makes it very real... a particle makes a field, and a field acts on another particle, and the field has such familiar properties as energy content and momentum, just as particles can have"". In practice, the strength of most fields has been found to diminish with distance to the point of being undetectable. For instance the strength of many relevant classical fields, such as the gravitational field in Newton's theory of gravity or the electrostatic field in classical electromagnetism, is inversely proportional to the square of the distance from the source (i.e. they follow the Gauss's law). One consequence is that the Earth's gravitational field quickly becomes undetectable on cosmic scales.A field can be classified as a scalar field, a vector field, a spinor field or a tensor field according to whether the represented physical quantity is a scalar, a vector, a spinor or a tensor, respectively. A field has a unique tensorial character in every point where it is defined: i.e. a field cannot be a scalar field somewhere and a vector field somewhere else. For example, the Newtonian gravitational field is a vector field: specifying its value at a point in spacetime requires three numbers, the components of the gravitational field vector at that point. Moreover, within each category (scalar, vector, tensor), a field can be either a classical field or a quantum field, depending on whether it is characterized by numbers or quantum operators respectively. In fact in this theory an equivalent representation of field is a field particle, namely a boson.