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Project 9: Stellar Spectra: Temperature
... depends on the availability of electrons to move to higher energies and on atomic factors, namely the likelihood of absorption in the presence of a passing photon. The efficiencies depend critically on temperature and can be calculated from theory or measured in the labo ...
... depends on the availability of electrons to move to higher energies and on atomic factors, namely the likelihood of absorption in the presence of a passing photon. The efficiencies depend critically on temperature and can be calculated from theory or measured in the labo ...
EXPLORING THE MAGNETIC PHASES IN DYSPROSIUM
... With one of the highest intrinsic magnetic moments (10.6 µB) among the heavy rare-earth elements, dysprosium (Dy) exhibits a rich magnetic phase diagram, including a few modulated magnetic phases. Aided by the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction, the magnetic modulations propagate coher ...
... With one of the highest intrinsic magnetic moments (10.6 µB) among the heavy rare-earth elements, dysprosium (Dy) exhibits a rich magnetic phase diagram, including a few modulated magnetic phases. Aided by the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction, the magnetic modulations propagate coher ...
Chapter 4 SINGLE PARTICLE MOTIONS
... This helix, however, defines a fundamental time unit – the cyclotron frequency ωc and a fundamental distance scale – the Larmor radius rL . For inhomogeneous and time varying fields whose length L and time ω scales are large compared with ωc and rL it is often possible to expand the orbit equations in ...
... This helix, however, defines a fundamental time unit – the cyclotron frequency ωc and a fundamental distance scale – the Larmor radius rL . For inhomogeneous and time varying fields whose length L and time ω scales are large compared with ωc and rL it is often possible to expand the orbit equations in ...
Electric Current
... • Characteristics of series circuit (continued): 4. The total voltage impressed across a series circuit divides among the individual electrical devices in the circuit so that the sum of the “voltage drops” across the resistance of each individual device is equal to the total voltage supplied by the ...
... • Characteristics of series circuit (continued): 4. The total voltage impressed across a series circuit divides among the individual electrical devices in the circuit so that the sum of the “voltage drops” across the resistance of each individual device is equal to the total voltage supplied by the ...
Solar flares
... Petschek Reconnection The Petschek model reduces the size of the diffusion region. Reconnection rate increases as plasma is ‘slingshotted’ out Outflow at ~ Alfvèn speed ...
... Petschek Reconnection The Petschek model reduces the size of the diffusion region. Reconnection rate increases as plasma is ‘slingshotted’ out Outflow at ~ Alfvèn speed ...
Paper
... mill corresponds to the same characteristics of the magnetic-dielectric composite (iron powder coated with liquid glass). The addition of alcohols into quartz during mechanical activation has different effects on its magnetization (Table 3). Almost in all the cases some periodicity of magnetization ...
... mill corresponds to the same characteristics of the magnetic-dielectric composite (iron powder coated with liquid glass). The addition of alcohols into quartz during mechanical activation has different effects on its magnetization (Table 3). Almost in all the cases some periodicity of magnetization ...
Suppression of runaway electron avalanches by radial
... theoretically for over four decades. Early work focused on the formation of fast electrons through the combined effects of a constant electric field and velocity–space diffusion as described by the Fokker–Planck equation.4–7 This is sometimes referred to as the primary generation of runaways. More r ...
... theoretically for over four decades. Early work focused on the formation of fast electrons through the combined effects of a constant electric field and velocity–space diffusion as described by the Fokker–Planck equation.4–7 This is sometimes referred to as the primary generation of runaways. More r ...
MRI SAFETY JEOPARDY (NONTechnologist Edition) Questions
... Though very rare, there is a link between patients with impaired kidney function who received injected MRI contrast and a disease known by its abbreviation, NSF. To protect from the risk of this disease, patients are often screened for low‐kidney‐function risk factors, and may be given blood tests ...
... Though very rare, there is a link between patients with impaired kidney function who received injected MRI contrast and a disease known by its abbreviation, NSF. To protect from the risk of this disease, patients are often screened for low‐kidney‐function risk factors, and may be given blood tests ...
06 _chapter 2
... In the commercial world, ferrites are usually classified as soft ferrites and hard ferrites depending upon their magnetic properties. The distinguishing characteristic of the first group is high permeability. Its flux – multiplying power made it suitable for their job in machines and devices. Magnet ...
... In the commercial world, ferrites are usually classified as soft ferrites and hard ferrites depending upon their magnetic properties. The distinguishing characteristic of the first group is high permeability. Its flux – multiplying power made it suitable for their job in machines and devices. Magnet ...
Lab Manual: Helmholtz Galvanometer
... For a coil consisting of n turns of wire and having a mean radius r, the magnetic field at a point on the axis at a distance x from the center of the coil is given by F= ...
... For a coil consisting of n turns of wire and having a mean radius r, the magnetic field at a point on the axis at a distance x from the center of the coil is given by F= ...
Superconductivity
![](https://commons.wikimedia.org/wiki/Special:FilePath/Meissner_effect_p1390048.jpg?width=300)
Superconductivity is a phenomenon of exactly zero electrical resistance and expulsion of magnetic fields occurring in certain materials when cooled below a characteristic critical temperature. It was discovered by Dutch physicist Heike Kamerlingh Onnes on April 8, 1911 in Leiden. Like ferromagnetism and atomic spectral lines, superconductivity is a quantum mechanical phenomenon. It is characterized by the Meissner effect, the complete ejection of magnetic field lines from the interior of the superconductor as it transitions into the superconducting state. The occurrence of the Meissner effect indicates that superconductivity cannot be understood simply as the idealization of perfect conductivity in classical physics.The electrical resistivity of a metallic conductor decreases gradually as temperature is lowered. In ordinary conductors, such as copper or silver, this decrease is limited by impurities and other defects. Even near absolute zero, a real sample of a normal conductor shows some resistance. In a superconductor, the resistance drops abruptly to zero when the material is cooled below its critical temperature. An electric current flowing through a loop of superconducting wire can persist indefinitely with no power source.In 1986, it was discovered that some cuprate-perovskite ceramic materials have a critical temperature above 90 K (−183 °C). Such a high transition temperature is theoretically impossible for a conventional superconductor, leading the materials to be termed high-temperature superconductors. Liquid nitrogen boils at 77 K, and superconduction at higher temperatures than this facilitates many experiments and applications that are less practical at lower temperatures.