Earth Science
... revealed that, like the age of ocean crust, the thickness of ocean-floor sediments increases with distance from an ocean ridge. ...
... revealed that, like the age of ocean crust, the thickness of ocean-floor sediments increases with distance from an ocean ridge. ...
Earnshaw`s Theorem and Magnetic Levitation
... Earnshaw’s Theorem applies in situations were two inverse square law forces are centred on different coordinate frame origins. Let’s suppose for the sake of argument that the magnetic force of repulsion does obey an inverse square law force. In the case of ring magnets placed over a wooden stick, th ...
... Earnshaw’s Theorem applies in situations were two inverse square law forces are centred on different coordinate frame origins. Let’s suppose for the sake of argument that the magnetic force of repulsion does obey an inverse square law force. In the case of ring magnets placed over a wooden stick, th ...
Magnetoencephalography
... • An important difference is that the skull and the tissue surrounding the brain affect the magnetic fields measured by MEG much less than they affect the electrical impulses measured by EEG. • The advantage of MEG over EEG is therefore greater accuracy owing to the minimal distortion of the signal. ...
... • An important difference is that the skull and the tissue surrounding the brain affect the magnetic fields measured by MEG much less than they affect the electrical impulses measured by EEG. • The advantage of MEG over EEG is therefore greater accuracy owing to the minimal distortion of the signal. ...
printer-friendly version of benchmark
... An electromagnet consists of a coil of wire usually wound around an iron core. The core becomes magnetized when an electric current is sent through the wire coiled around it. Electromagnets have many essential applications, including picking up metal containing iron in salvage yards, use in speakers ...
... An electromagnet consists of a coil of wire usually wound around an iron core. The core becomes magnetized when an electric current is sent through the wire coiled around it. Electromagnets have many essential applications, including picking up metal containing iron in salvage yards, use in speakers ...
L10_EM_Induction
... As we have seen, magnetic forces come from electric charges in motion. There are no free magnetic charges. Magnetic field lines diverge from N poles and converge into S poles, but they do not begin or end at either pole. Then Qmagnetic = 0, so that there cannot be enclosed charge. Gauss’s Law for ma ...
... As we have seen, magnetic forces come from electric charges in motion. There are no free magnetic charges. Magnetic field lines diverge from N poles and converge into S poles, but they do not begin or end at either pole. Then Qmagnetic = 0, so that there cannot be enclosed charge. Gauss’s Law for ma ...
B - Physics 420 UBC Physics Demonstrations
... • Dot pitch is the diagonal distance between dots of the same colour (DP) • Vertical dot pitch is vertical distance between same colour dots For this lab we are interested in Vertical Dot Pitch We will call the Vertical Dot Pitch ∆x for this lab ...
... • Dot pitch is the diagonal distance between dots of the same colour (DP) • Vertical dot pitch is vertical distance between same colour dots For this lab we are interested in Vertical Dot Pitch We will call the Vertical Dot Pitch ∆x for this lab ...
Science 9 Unit 4: Electricity Name
... Some motors run on direct current (DC). It is 'direct', because the electricity flows in only one direction. Alternating current (AC) flows back and forth 60 times per second. ...
... Some motors run on direct current (DC). It is 'direct', because the electricity flows in only one direction. Alternating current (AC) flows back and forth 60 times per second. ...
Document
... Field along the axis of a ring We already calculated this field the hard way. It is often easier to first calculate the potential, then use its gradient to get the field. ...
... Field along the axis of a ring We already calculated this field the hard way. It is often easier to first calculate the potential, then use its gradient to get the field. ...
Using magnetic fields to keep things moving
... The weight of the rule produces a clockwise moment because its centre of mass is to the right of the pivot/ (Moving B left) reduces the (total) clockwise moment (3 marks) ...
... The weight of the rule produces a clockwise moment because its centre of mass is to the right of the pivot/ (Moving B left) reduces the (total) clockwise moment (3 marks) ...
Jan31
... In the ELECTROMAGNETIC SYSTEM (or EMU) charge is defined in terms of the force between two current carrying wires: Two wires of 1 cm length, each carrying 1 EMU of current exert a force of 1 DYNE when separated by 1 cm. ...
... In the ELECTROMAGNETIC SYSTEM (or EMU) charge is defined in terms of the force between two current carrying wires: Two wires of 1 cm length, each carrying 1 EMU of current exert a force of 1 DYNE when separated by 1 cm. ...
Drifting Continents and Spreading Seas
... these ridges, and much less elsewhere. This derives from the presence of hot magma very close to the surface along ridges. Submarine Earthquakes. Earthquakes on the seafloor are not distributed randomly, but occur along the ridges and trenches. ...
... these ridges, and much less elsewhere. This derives from the presence of hot magma very close to the surface along ridges. Submarine Earthquakes. Earthquakes on the seafloor are not distributed randomly, but occur along the ridges and trenches. ...
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.