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When magnetic lines of force are parallel to the surface of the carrier sheet, the surfaces of the flakes are reflective, and appear bright. When lines of force are perpendicular to the sheet, the flakes are edge-on, and appear significantly darker. When the film is placed on a magnet's pole, the latter case applies.
Chpt 8 & 19 [2]: Chpt 7 & 8 Metals are typically ductile (can be drawn into wires) and malleable (they can be hammered into thin sheets). [ 3 ] A metal may be a chemical element such as iron ; an alloy such as stainless steel ; or a molecular compound such as polymeric sulfur nitride . [ 4 ]
The first commercially successful type of electrical phonograph pickup was introduced in 1925. Although electromagnetic, its resemblance to later magnetic cartridges is remote: it employed a bulky horseshoe magnet and used the same single-use steel needles which had been standard since the first mechanical transfer disc record players appeared in the 1890s.
The magnetic flux, represented by the symbol Φ, threading some contour or loop is defined as the magnetic field B multiplied by the loop area S, i.e. Φ = B ⋅ S.Both B and S can be arbitrary, meaning that the flux Φ can be as well but increments of flux can be quantized.
Paramagnetism, ferromagnetism, and spin waves. Ferromagnetism is a property of certain materials (such as iron) that results in a significant, observable magnetic permeability, and in many cases, a significant magnetic coercivity, allowing the material to form a permanent magnet.
This video is an example of how to create a page for the new and modern day scrapbooker. Marielen Wadley Christensen (pronounced as the names "Mary Ellen"), of Elk Ridge, Utah, United States (formerly of Spanish Fork, Utah) is credited with turning scrapbooking from what was once just the ages-old hobby into the actual industry containing businesses devoted specifically to the manufacturing ...
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