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  2. Electromagnetic lock - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_lock

    Because the mating area of the electromagnet and armature is relatively large, the force created by the magnetic flux is strong enough to keep the door locked even under stress. Typical single door electromagnetic locks are offered in both 600 lbs. (2669 N ) and 1200 lbs. (5338 N) dynamic holding force capacities.

  3. Sensurround - Wikipedia

    en.wikipedia.org/wiki/Sensurround

    35mm 4-Track Magnetic with Optical Track (magoptical): This type of Sensurround print was not usable as a mono optical print. Unlike standard magoptical prints, in which the optical track was a mono version of the magnetic stereo tracks, the optical track on magnetic Sensurround prints contained only the control tones. If played as a standard ...

  4. Faraday cage - Wikipedia

    en.wikipedia.org/wiki/Faraday_cage

    Animation showing how a Faraday cage (box) works. When an external electrical field (arrows) is applied, the electrons (little balls) in the metal move to the left side of the cage, giving it a negative charge, while the remaining unbalanced charge of the nuclei give the right side a positive charge. These induced charges create an opposing ...

  5. Walmart Deals 2024: It's your last chance to shop these ... - AOL

    www.aol.com/lifestyle/walmart-deals-2024-its...

    The extra-soft pillow top gently contours the body for even more enhanced cushioning while you snooze. Each mattress comes with a 10-year limited warranty and is made in the U.S.A. $394 at Walmart

  6. Permeability (electromagnetism) - Wikipedia

    en.wikipedia.org/wiki/Permeability...

    Paramagnetic materials are attracted to magnetic fields, hence have a relative magnetic permeability greater than one (or, equivalently, a positive magnetic susceptibility). The magnetic moment induced by the applied field is linear in the field strength, and it is rather weak. It typically requires a sensitive analytical balance to detect the ...

  7. Magnetic keyed lock - Wikipedia

    en.wikipedia.org/wiki/Magnetic_keyed_lock

    A magnetic keyed padlock A magnetic keyed padlock. A magnetic keyed lock or magnetic-coded lock is a locking mechanism whereby the key utilizes magnets as part of the locking and unlocking mechanism. Magnetic-coded locks encompass knob locks, cylinder locks, lever locks, and deadbolt locks as well as applications in other security devices.

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