The magnetic field of the Earth is fairly weak on the surface. After all, the planet Earth is almost 8,000 miles in diameter, so the magnetic field has to travel a long way to affect your compass. That is why a compass needs to have alightweight magnetand africtionless bearing. Otherwi...
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Magnets, gravity and filters then remove things like staples, glues and other unwanted chemicals from the pulp. The ink is removed by either a chemical wash, or by blowing the ink to the surface where it's skimmed off. The pulp -- which may be bleached -- is then sprayed and rolled ...
How Car Computers Work How does a speedometer in an airplane work? How Magnets Work Sources “100 Years of Speedometers — The History of Driver Information,” November 7, 2002. Found online at: http://www.siemensvdo.com/press/releases/interior/2002/SV-200211-009-e.htm. “Automating Speedo...
6. Check for any magnets nearby Inside your MacBook’s lid, there’s a tiny magnet that reacts when the lid is closed. But when there are other magnets nearby that send a wrong signal to your MacBook, telling it to shut down. For example, this happens if you place your computer ato...
When your body is in an MRI scanner, strong magnetic fields cause the hydrogen atoms to act as tiny magnets, and they all align with the magnetic field. Radio waves are used in short bursts to knock the hydrogen atoms out of their magnet-induced alignments. When the radio waves are ...
Some people believe magnets have health benefits, like weight loss and muscle contouring, which gives this chair added value. But beware. The chair comes with some standard warnings: Keep it away from computers, credit cards and other cards with magnetic strips, cell phones, and large metallic ...
Information can be "written" on a magstripe because the bar magnets can be magnetized in either a north or south pole direction. If a magstripe reader — such as those within an ATM or at a checkout — isn't accepting your card, your problem is probably either a dirty or scratched ...
a microphone is a device that converts sound waves into an electrical signal. it allows you to capture audio and transmit it to various devices, such as computers, amplifiers, or recording equipment. how does a microphone work? a microphone consists of a diaphragm, a coil or capacitor, and...
Since magnets large enough to affect an entire suit would be heavy and impractical to carry around, researchers propose creating tiny circuits running throughout the armor. Magnetorheological fluid before and after exposure to a magnetic field Without current flowing through the wires, the armor ...