Accreting magnetars: a new type of high-mass X-ray binaries? P. Reig,
... neutron star spin evolution. Finger et al. (2010) derived an average rate of the spin frequency change of ν̇ = (−1.7 ± 0.3) × 10−14 Hz s−1 . Based on the slow pulsation period and the spin-down rate, they show that the 5560-s pulsations in the X-ray flux of 4U 2206+54 can be explained ‘provided the ...
... neutron star spin evolution. Finger et al. (2010) derived an average rate of the spin frequency change of ν̇ = (−1.7 ± 0.3) × 10−14 Hz s−1 . Based on the slow pulsation period and the spin-down rate, they show that the 5560-s pulsations in the X-ray flux of 4U 2206+54 can be explained ‘provided the ...
and magnetism - Black River Local Schools
... The activities in this section provide participants with exposure to the basic properties and behavior of magnets. There are no prerequisites to this section, although most 4th – 9th grade students (and teachers) have already had experiences with and learned some facts about magnets. While participa ...
... The activities in this section provide participants with exposure to the basic properties and behavior of magnets. There are no prerequisites to this section, although most 4th – 9th grade students (and teachers) have already had experiences with and learned some facts about magnets. While participa ...
Fluids and Buoyant Force
... Fluid Pressure and Temperature Example 3. In a hydraulic car lift, the compressed air exerts a force on a piston with a base radius of 5.00 cm. The pressure is transmitted to a second piston with a base radius of 35.0 cm. How much force must be exerted on the first piston to lift a car with a mass ...
... Fluid Pressure and Temperature Example 3. In a hydraulic car lift, the compressed air exerts a force on a piston with a base radius of 5.00 cm. The pressure is transmitted to a second piston with a base radius of 35.0 cm. How much force must be exerted on the first piston to lift a car with a mass ...
ME33: Fluid Flow Lecture 1: Information and Introduction
... Fluids in rigid – body motion In this section we obtain relations for the variation of pressure in fluids moving like a solid body with or without acceleration in the absence of any shear stresses (i.e., no motion between fluid layers relative to each other). ...
... Fluids in rigid – body motion In this section we obtain relations for the variation of pressure in fluids moving like a solid body with or without acceleration in the absence of any shear stresses (i.e., no motion between fluid layers relative to each other). ...
Photospheric processes and magnetic flux tubes
... The magnetic structure of a hydrostatic flux tube (cont.) Curiously, there is a maximum twist that can be applied to such a flux tube. For the region far enough above the merging height the radial component of the magnetic field vanishes and the gas pressure becomes negligible so that Ampères law ...
... The magnetic structure of a hydrostatic flux tube (cont.) Curiously, there is a maximum twist that can be applied to such a flux tube. For the region far enough above the merging height the radial component of the magnetic field vanishes and the gas pressure becomes negligible so that Ampères law ...
Dynamical response of magnetic tubes to transverse
... excitation generates longitudinal body waves of twice the frequency. This mode conversion process is not very efficient. A very important result of our computations, however, is the efficient generation of a non-axisymmetric longitudinal body wave which does not derive from magnetic tension forces, ...
... excitation generates longitudinal body waves of twice the frequency. This mode conversion process is not very efficient. A very important result of our computations, however, is the efficient generation of a non-axisymmetric longitudinal body wave which does not derive from magnetic tension forces, ...
manipulating colloidal crystallization for photonic
... place is a powerful way to steer the crystallization process. The reason for the increased possibilities compared to the atomic world is directly related to the size of colloids. Because colloids are so much larger than atoms, truly ‘atomically’ smooth walls can be made easily. If the container wall ...
... place is a powerful way to steer the crystallization process. The reason for the increased possibilities compared to the atomic world is directly related to the size of colloids. Because colloids are so much larger than atoms, truly ‘atomically’ smooth walls can be made easily. If the container wall ...
Fusion: A true challenge for an enormous reward
... Fusion of heavier nuclei in stars will occur at higher temperatures. From the formula above, it is immediately clear that a contraction of the star under its own gravity will further raise the central temperature. Fusion in heavy stars will continue to keep the star alive as long as the reactions ar ...
... Fusion of heavier nuclei in stars will occur at higher temperatures. From the formula above, it is immediately clear that a contraction of the star under its own gravity will further raise the central temperature. Fusion in heavy stars will continue to keep the star alive as long as the reactions ar ...
Magnetism and Static Electricity WebQuest
... electricity): http://www.energyquest.ca.gov/story/chapter03.html ...
... electricity): http://www.energyquest.ca.gov/story/chapter03.html ...
Ferrofluid
A ferrofluid (portmanteau of ferromagnetic and fluid) is a liquid that becomes strongly magnetized in the presence of a magnetic field.Ferrofluid was invented in 1963 by NASA's Steve Papell as a liquid rocket fuel that could be drawn toward a pump inlet in a weightless environment by applying a magnetic field.Ferrofluids are colloidal liquids made of nanoscale ferromagnetic, or ferrimagnetic, particles suspended in a carrier fluid (usually an organic solvent or water). Each tiny particle is thoroughly coated with a surfactant to inhibit clumping. Large ferromagnetic particles can be ripped out of the homogeneous colloidal mixture, forming a separate clump of magnetic dust when exposed to strong magnetic fields. The magnetic attraction of nanoparticles is weak enough that the surfactant's Van der Waals force is sufficient to prevent magnetic clumping or agglomeration. Ferrofluids usually do not retain magnetization in the absence of an externally applied field and thus are often classified as ""superparamagnets"" rather than ferromagnets.The difference between ferrofluids and magnetorheological fluids (MR fluids) is the size of the particles. The particles in a ferrofluid primarily consist of nanoparticles which are suspended by Brownian motion and generally will not settle under normal conditions. MR fluid particles primarily consist of micrometre-scale particles which are too heavy for Brownian motion to keep them suspended, and thus will settle over time because of the inherent density difference between the particle and its carrier fluid. These two fluids have very different applications as a result.