powerful magnets
how powerful can a magnet be?
Can a very small magnet be very powerful? I know everyone’s heard of the toys called “Magnetix”, which has supposedly caused the death of a child. They are so powerful, that they actually caused his intestines to close, forcing bacteria into his blood stream.
There was the James Bond movie, “Live and Let Die”, where he had a watch with a super-high powered magnet, which you could use to grab a piece of metal from 10 feet away. I don’t know if they are THAT powerful, but think of the possibilities. A super powerful magnet is in the ceiling of a convienence store. Someone goes in and brandishes a gun. The magnet causes the gun to go flying out of the robbers hand, and the robbery is botched.
Anyone think that would work? Could magnets be THAT powerful, or THAT beneficial to humanity?
There is a theoretical limit to the strength of a magnet. Magnetic field is measured on Gauss. The practical limit to a useful magnetic field is on the order of 40,000 Gauss (compared to Earth’s magnetic field of 1 Gauss). Typical iron saturates at about this level meaning that even a stronger magnet will not produce a greater force on a piece of iron.
To figure the maximum strength of a magnet. you can figure the change in the magnetic field energy as a piece of iron (or another magnet) approaches the magnet. When the objects are just ready to come in contact, the maximum force is around 100 psi. Meaning that a 1 square inch magnet can produce a force of 100 lbs. Keep in mind that the force drops off quickly as the pieces separate. There are ways to adjust the geometry to make the force drop off more slowly but the limit of about 100 pounds per square inch still holds.
The James Bond or “disarming convenience store” magnet is fiction and will remain so. This is because the field strength drops off so quickly. To do these kinds of actions requires a magnet that is at least as big in diameter as the distance that you expect it to act at. So to grab a piece of metal 10 feet away, you would need a 10 foot (and probably bigger) diameter magnet.
Magnet Brakes its own fall
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Set of Stainless Steel Magnets – by Blomus – 66742 (Stainless Steel) (2.5cm diameter) $9.39 This fine set of Stainless Steel Magnets are the perfect size and shape to help bring order to your refrigerator or note board — without the clutter and bad taste of those OVERSIZED, comical varieties of magnets so readily available in the mass market today. Clean, crisp design brought to life in stainless steel, married with powerful, second-to-none magnets – this set of will keep your notes wh… |
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Magnet Square Is Adhesive Backed And Powerful- Lifts Up To 1/2 Lb. (Pkg of 50) $19.50 It’s a hard rubber magnet on one side and has self-stick adhesive on the other. Peel off the paper, stick your item onto the foam adhesive back, then stick the magnet to a metal surface. Or, reverse the procedure and place the sticky side onto a wall, then put your metallic item onto the magnet. The adhesive will stick to smooth or rough surfaces. It’s quick, easy and best of all it can hold a lot… |
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Magnets – Round Peg (Chrome) (3/8W) $9.99 Peg Mighties are the amazingly strong magnets that provide the strongest hold for their size. Measuring only 3/8″ long, each fridge magnet is chrome plated for a shiny and lasting finish. These unbelievably powerful office magnets are available in packages of 8. They’re great for use with other metal items, such as office whiteboards, file cabinets, and more! Get organized today with these amazin… |
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HoMedics MW-EHC TheraP Hot/Cold Therapy Elbow Wrap with the Power of Magnets $14.95 Homedics MW-EHC (MWEHC) Hot/Cold Magnetic Elbow WrapA non-medical treatment for relief of aches and pains with 3 in 1 therapy options: Heat Therapy, Cold Therapy, or Magnetic Wave Technology. Hot/cold packs offer 2 options: heat for periodic treatment of injuries and cold for strains, sprains and bruises. Get natural pain relief with non-medical, magnet wave technology. Durable elbow brace feature… |
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Mens Stainless Steel Magnetic sports Bracelet with powerful magnets for aches and pains Magnetic Therapy ! Magnetic therapy is a natural method used to relieve pain, restore energy and enhance sleep ! It has proven to be a safe, effective, and economical form of alternative therapy. Magnetic therapy is thousands of years old, yet holds great promise for the future as our population ages and the cost of traditional health care spirals upward. ? Magnetic therapy will become important f… |
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CERA-HEAT Lumbar Spandex FIR plus Magnetic Belt : 26 powerful magnets surround your lower back for superior therapeutic treatment, in 4 sizes $33.95 Cera-heat lumbar waist belt relies on magnetic fields generated by 26 powerful neodymium / ceramic, uni-polar magnets strategically placed to work on your back area. Far Infrared rays emit deep but gentle heat reaching through several layers of clothing. It touches deep-lying strained muscles and nerves. This heat wave improves circulation, reduces pain and swelling, and speeds up recovery from fa… |
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2000mW 2W 802.11g/n High-Gain USB Wireless G / N Long-Rang WiFi Network Adapter With Original Alfa Screw-On Swivel 9dBi Rubber Antenna with magnetic base and Suction cup Window Mount dock *Strongest on the Market* $44.95 You asked for STRONGER WiFi and Extended Range and here it is. We have combined this high power Wi-Fi adapters with a powerful +9 dBi 15′ 2.4GHz Hi-Gain folding antenna. Estimated range is (depending on environment) 1.2 mile (2km). It is compatible with almost all laptops and desktop, PCs and Macs. This kit also includes two antennas- one mini 5 dBi gain travel antenna, and one high gain 9 dBi ant… |
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2000mW 2W 802.11g/n High-Gain USB Wireless G / N Long-Rang WiFi Network Adapter With Original Alfa 9dBi Rubber Antenna with magnetic base *Strongest on the Market* $42.95 You asked for STRONGER WiFi and Extended Range and here it is. We have combined this high power Wi-Fi adapters with a powerful +9 dBi 15′ 2.4GHz Hi-Gain folding antenna with magnetic base. Estimated range is (depending on environment) 1.2 mile (2km). It is compatible with almost all laptops and desktop, PCs and Macs. This kit also includes two antennas- one mini 5 dBi gain travel antenna, and one … |
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Pyle PDS221 Midrange Tweeter Compression Horn Driver with 20 oz Magnet $33.04 Midrange/Tweeter Compression Horn Driver Titanium Diaphragm Terminals 205-Type 1.12 (28.6mm) Flat Aluminum Voice Coil 20 Oz Magnet Structure Frequency Response: 800Hz-20KHz Sensitivity: 102dB @ 1W/ 1M 8 Ohm Impedance 150 Watts RMS /300 Watts Peak Power Fits Horms With 1-3/8 x 18 TPI Threads Overall Dimensions: 3.2 Diameter x 3 Depth… |
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Buzz Magnets $0.01 Toss the Buzz Magnets into the air. The 2 hematite magnets fly & collide, wrestling for equilibrium in a clattering, buzzing, cicada sounding collision until they land at rest, centered and quiet in your cupped hands. A pair of powerful ellipsoidal hematite magnets, their poles aligned through their narrow circumferences, allow you to demonstrate the constant striving of the magnets to stay in per… |
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THE CUBE (5 sets) 1080 Magnet Balls 5 Normal Sets !- MAGIC MAGNETIC ORBS 5x 216 SPHERES + FREE SUPER BRIGHT LED MICRO FLASHLIGHT (KEEP AWAY FROM CHILDREN – AGE 14+) $129.99 Magic Magnetic Orbs -The Cube is a new puzzle with infinite solutions geared to motivate the brain and offer hours of amusement. The Cube is comprised of 216 rare earth magnetic spheres, perfect for forming into an infinite number of 2-Dimensional and 3-Dimensional objects. WARNING: Keep Away From All Children! Do not put in nose or mouth. Swallowed magnets can stick to intestines causing serious… |
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Tiny Powerful 6 Pc Cake Slices Japanese Magnets $9.95 Yummy! These cakes look so tasty. From chocolate cake, cheese cake to cup cake and pies love by all. Perfect little gift for the dessert lovers and pastry chefs in your life. They can stay firmly on refrigerators, magnet boards, and lockers. MADE IN Japan. For ages 10 to 103. Pack 4″ x 4″, approx 3/4″ EA… |
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Pair of Brand New JVC Cs-hx537x 5.25 Shallow-mount Powerful 460 Watt Speakers with Neo Magnets $44.95 Pair of brand new JVC CS-HX537X 5.25″ shallow-mount powerful 460 watt speakers with neo magnets Features: 5-1/4″ 3 Way JVC Car Speakers |
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Pyle PDBN652 Midrange Tweeter Compression Horn Driver with 16t/m oz Magnet $49.27 Frequency response: 800Hz-20hKz250 watts RMS/ 500 watts peak 8 ohm impedence25 oz magnet structure1.35″ flat aluminum voice coil… |
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Brand New Valor Audio Vp150d4 15 Dual Voice Coil 4 Ohm 800 Watt Big and Powerful Car Subwoofer with Extra Large Magnet and Big 2.5 Asv Voice Coils *All Specs Are Accurately Lab Tested and Rated* BRAND NEW VALOR AUDIO VP150D4 15″ DUAL VOICE COIL 4 OHM 800 WATT BIG AND POWERFUL CASUBWOOFER R WITH EXTRA LARGE MAGNET AND BIG 2.5″ ASV VOICE COILS Features: Heavy Gauge Stamped & Coated Steel Basket |
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1000mW 1W 802.11g/n High Gain USB Wireless G / N Long-Rang WiFi Network Adapter – Dongle With Original Alfa 9dBi Rubber Antenna with magnetic base *Strongest on the Market* $31.95 This is an 802.11n wireless USB adapter with a maximum output power of 1 watt (that’s 1000 mW). This is a single band (2.4 GHz) 1T1R 802.11n adapter with maximum transfer speeds of 150 megabits per second (mbps). This is for one brand new (in retail box) AWUS036NEH wireless adapter with 5 dBi gain antenna. Also included in the retail box is the installation software on CD.The AWUS036NEH hooks up t… |
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Old Time Secrets of Making Permanent Magnets: An anthology of simple techniques used over the centuries to create powerful permanent magnets $3.94 … |
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Magnet Therapy: Discover the Powerful New Force in Health and Recovery $86.91 … |
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Universal Magnetism: Two Volume Set: A Private Training Course in the Magnet Control Of Others; By The Most Powerful Of All Known Methods Scarce two volume set of a private training course in the magnetic control of others taught by Edmund Shaftesbury…. |
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HoMedics MW-A Magnetic wave ankle wrap with 9 powerful bi-polar magnets $19.99 Magnetic therapy is older than modern medicine and some people claim great results. The Magnetic Wave ankle wrap has 9 powerful bi-polar magnets which enhance relief of pain and improve blood flow. Comfortable and lightweight design with premium quality neoprene retains body heat while helping to compress the injured area …. |
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Master Magnetics #07212 Powerful Handle Magnet $3.30 Powerful Handle Magnet, Lifts Up To 25 LBS, Ideal for Lifting Holding & Retrieving Metal Objects To 100 Times Own Weight, Permanent Magnetism Red, Clamshell Package With Bar Code…. |
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30mm Magswitch Magnetic Jig $36.99 A powerful magnet you can turn on or off! Build your own jigs to handle a wide range of woodworking applications anywhere on a steel table. Patented Magswitch technology allows magnetic force to be switched on and off, allowing for fast, easy setup and adjustment. Simply turn knob clockwise to engage the magnet; turn counter-clockwise to disengage magnetic field. Jigs are available in 30mm or 20… |
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Powerful 108-square-inch Magnetic Sweepers with Easy-Release and Adjustable handle $89.00 108-square-inch Powerful Magnetic Sweepers with easy release handle 108 square inches sweeping area * Powerful Magnetic Force … |
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Set of Stainless Steel Magnets – by Blomus – 66742 (Stainless Steel) (2.5cm diameter) $9.39 This fine set of Stainless Steel Magnets are the perfect size and shape to help bring order to your refrigerator or note board — without the clutter and bad taste of those OVERSIZED, comical varieties of magnets so readily available in the mass market today. Clean, crisp design brought to life in stainless steel, married with powerful, second-to-none magnets – this set of will keep your notes wh… |
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|
Magnet Square Is Adhesive Backed And Powerful- Lifts Up To 1/2 Lb. (Pkg of 50) $19.50 It’s a hard rubber magnet on one side and has self-stick adhesive on the other. Peel off the paper, stick your item onto the foam adhesive back, then stick the magnet to a metal surface. Or, reverse the procedure and place the sticky side onto a wall, then put your metallic item onto the magnet. The adhesive will stick to smooth or rough surfaces. It’s quick, easy and best of all it can hold a lot… |
|
|
Magnets – Round Peg (Chrome) (3/8W) $9.99 Peg Mighties are the amazingly strong magnets that provide the strongest hold for their size. Measuring only 3/8″ long, each fridge magnet is chrome plated for a shiny and lasting finish. These unbelievably powerful office magnets are available in packages of 8. They’re great for use with other metal items, such as office whiteboards, file cabinets, and more! Get organized today with these amazin… |
|
|
Master Magnetics #07212 Powerful Handle Magnet $3.30 Powerful Handle Magnet, Lifts Up To 25 LBS, Ideal for Lifting Holding & Retrieving Metal Objects To 100 Times Own Weight, Permanent Magnetism Red, Clamshell Package With Bar Code…. |
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30mm Magswitch Magnetic Jig $36.99 A powerful magnet you can turn on or off! Build your own jigs to handle a wide range of woodworking applications anywhere on a steel table. Patented Magswitch technology allows magnetic force to be switched on and off, allowing for fast, easy setup and adjustment. Simply turn knob clockwise to engage the magnet; turn counter-clockwise to disengage magnetic field. Jigs are available in 30mm or 20… |
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Powerful 108-square-inch Magnetic Sweepers with Easy-Release and Adjustable handle $89.00 108-square-inch Powerful Magnetic Sweepers with easy release handle 108 square inches sweeping area * Powerful Magnetic Force … |
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HoMedics MW-EHC TheraP Hot/Cold Therapy Elbow Wrap with the Power of Magnets $14.95 Homedics MW-EHC (MWEHC) Hot/Cold Magnetic Elbow WrapA non-medical treatment for relief of aches and pains with 3 in 1 therapy options: Heat Therapy, Cold Therapy, or Magnetic Wave Technology. Hot/cold packs offer 2 options: heat for periodic treatment of injuries and cold for strains, sprains and bruises. Get natural pain relief with non-medical, magnet wave technology. Durable elbow brace feature… |
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Mens Stainless Steel Magnetic sports Bracelet with powerful magnets for aches and pains Magnetic Therapy ! Magnetic therapy is a natural method used to relieve pain, restore energy and enhance sleep ! It has proven to be a safe, effective, and economical form of alternative therapy. Magnetic therapy is thousands of years old, yet holds great promise for the future as our population ages and the cost of traditional health care spirals upward. ? Magnetic therapy will become important f… |
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