how do magnets work in refrigerators

Basically, millions of tiny magnets create a flexible magnetic sheet! Refrigerator magnets come in different colors and designs. The molecules in it are arranged in a way different than most magnets which is why the magnet has a tendency to attract materials more. Currently, physics has two explanations for why magnetic fields align in the same direction: a large-scale theory from classical physics, and a small-scale theory called quantum mechanics. Q. Most refrigerators have sheet steel doors and the magnetic field lines pass through the door metal from the north poles of the sheet magnet to the south poles, making the magnet stick to the refrigerator door. When that alignment takes place, the fridge door becomes magnetic, and is then attracted to the refrigerator magnet. If it's not magnetic, I guess it's held by pressure and the door has a lock? Magnets are used for a variety of purposes, ranging from attaching items to refrigerator doors … How do magnets work inside fridge doors, beneath the seal to stop it opening? When that alignment takes place, the fridge door becomes magnetic, and is then attracted to the refrigerator magnet. Others help to store all the files on your computer’s hard disk. You’ll also find magnets in medical devices to create a magnetic picture, in trains, and in the systems used to slow down roller coasters. These sheets work best when attached to a solid metal object, such as a refrigerator door or other metal surfaces. While the old-timey fridges can still be found in vintage bars and your weird uncle’s garage, they are pretty rare, and child deaths from being trapped in refrigerators dropped significantly after the act was introduced. Door closure magnets on fridges are relatively weak - you can see how weak with the flat blade of a knife - any stronger and it would make opening the door very difficult. One further benefit of of the magnetic seal is that because it is flexible, it creates an airtight seal even if the the door and cabinet are not precisely aligned, or if … New York, The thickness of the magnet designates its strength, but thicker types of magnet paper are more limited in terms of the printers that can handle their size. This creates a magnetic surface you can use to hang reminders, notes or … But don't even think of cluttering up that beautiful new fridge with magnets. Magnets and the magnetic force are ubiquitous in our everyday lives, helping to guide us in unfamiliar territory and attach our kids' artwork to the fridge. You need JavaScript enabled to view it . A magnet is a substance that is made of iron. There are also kitchen magnets that are shaped like wine bottles with labels that closely resemble famous wine brands. All orders come with one page of easy instructions. The Homer Simpson or Mickey Mouse magnet that holds things to your refrigerator is a permanent magnet: it keeps hold of its magnetism all the time. "This is a big deal. The resulting force holds the magnet onto the refrigerator. Future US, Inc. 11 West 42nd Street, 15th Floor, When broken down into tiny pieces and smashed into Silly Putty, they can provide hours of fun. All refrigerators must seal to lock out the warm air and keep cool air inside. It was decided that if weak magnetic strips were used on fridge doors they would be able to create an air-proof seal, but would open from the inside … Magnets are used to keep refrigerator doors closed and are even mounted on trucks that clean roads. They’re used in everything from car engines to computers. Refrigerator magnets can be cute, but they’re no laughing matter for people with pacemakers or an implanted medical or heart device. In other words, the inherent appeal + low cost makes magnets the perfect vehicle for advertising. CleanSteel is a laminate vinyl with the look of stainless, so magnets will stick to. Buy a magnetic board that hangs from suction cups to hang on the front of your refrigerator. There was a problem. Magnets are a direct result of the physics taking place at the atomic level (i.e. The Homer Simpson or Mickey Mouse magnet that holds things to your refrigerator is a permanent magnet: it keeps hold of its magnetism all the time. 60,000 Q&A topics -- Education, Aloha, & Fun topic 13633 How do refrigerator magnets work . Physicists have some understanding of how magnets function. The magnetic strip runs the length and width of the refrigerator and freezer door. Every time people open and close the refrigerator doors your … MORE : Artist creates incredible scenes showing Lego like you’ve never seen it before, MORE : Girl, 13, who thought she had a headache was actually having a stroke. Got a question? We’ve also reviewed how magnets work, what a magnetic field is, and how to tell which pole is which. Fridge magnets can be used to attach notes or reminders to the fridge, to spell messages or just to add a little color to the big white expanse. ; Alnico magnets are made from aluminum, nickel and cobalt. MORE : Woman’s tummy tuck becomes infected, causing her stomach to explode, Get your need-to-know The magnetic skin covers, fit all refrigerator & dishwasher models. Many people connect magnets in their minds to tiny items on a refrigerator or whiteboard, the guts of a compass, or perhaps a giant, red, horseshoe-shaped object used in cartoons. Note how the field is extended out one side as compared to simply alternating direction. However some people still ask whether it will actually work. However, the most common ones are those that are related to kitchen work and food. Custom refrigerator magnets enjoy an impressive track record for a number of reasons. Many of us don't know what makes up magnetic fields, or why they work, and believe that magnetism does … Magnetic refrigeration is a cooling technology based on the magnetocaloric effect. Did the original have a magnet, I'm guessing so? Basically, millions of tiny magnets create a flexible magnetic sheet! Otherwise, the electrons in the human body would cause everyone to stick to the refrigerator whenever they walked by, Walker said. The two are heated, mixed together, and poured into a sheet mold which is then exposed to a strong magnetic field. More uses for magnets are found every day. It's just a feature of the universe, and the mathematical explanations are just attempts of getting through the 'homework assignment' of nature and getting the answers," Walker said. Large-scale magnetism, like the kind observed in bar magnets, results from magnetic fields that naturally radiate from … Most 2017 and newer stainless steel refrigerators will hold a magnet. Ceramic magnets, like the ones used in refrigerator magnets and elementary-school science experiments, contain iron oxide in a ceramic composite.Most ceramic magnets, sometimes known as ferric magnets, aren't particularly strong. Thank to Wikipedia for this image of a cross-section of a fridge magnet: You can build something like this with neodymium magnets. We already have materials that would work for wine-coolers and fridges, but researchers have struggled to find a material that can cool a device down to ultra low temperatures. However some people still ask whether it will actually work. Iron or ferrite magnets—dull grey in color and with low magnetic strength—aren’t the problem. You need JavaScript enabled to view it This e-mail address is being protected from spambots. It was decided that if weak magnetic strips were used on fridge doors they would be able to create an air-proof seal, but would open from the inside with a light push. And of course, they hold your latest straight “A” report card or artistic masterpiece to your family’s fridge. Thank you for signing up to Live Science. Move the magnets away from any heat sources, which can affect their strength. But in the quantum mechanics view, electrons emit undetectable, virtual particles that tell other objects to move away or come closer, Walker said. This creates a magnetic surface you can use to hang reminders, notes or children's school work … Magnets attract, or pull, objects made with iron. Every day you reach into your fridge for a snack before slamming the door closed. Fridges have magnetic doors. "We just observe that when you make a charged particle move, it creates a magnetic field and two poles. Okay, we’ve established that magnets are amazing. A magnet is a substance that is made of iron. These area are sometimes North-South side by side or alternating small slices across the bar. Ceramic magnets, like the ones used in refrigerator magnets and elementary-school science experiments, contain iron oxide in a ceramic composite.Most ceramic magnets, sometimes known as ferric magnets, aren't particularly strong. If you're the least bit crafty, it's not that hard. Gadolinium alloy heats up inside the magnetic field and loses thermal energy to the environment, so it exits the field and becomes cooler than when it entered. A refrigerator magnet is made of powdered ferrite (iron rust) and a liquid binding agent of plastic or rubber. Magnets: do they really work? 7 strange things that fell from the sky, 6 times that 2020 showed us women from antiquity were totally badass, Stunning telescope image of Jupiter and Saturn's Great Conjunction will amaze you, Jupiter and Saturn descend on world's tallest building in epic 'Great Conjunction' video. The magnetic field created by the fridge magnet aligns the spins of unpaired electrons in metal atoms in the fridge in such a way that the magnet and the fridge door are attracted to each other; this force keeps the magnet stuck to the fridge. The heavier the fridge magnet, the more powerful the magnet in the middle of it has to be. This magnet keeps the fridge door closed, and also closes the fridge if you have left it open. Fridge magnets have evolved to be popular advertising tools for business promotions. However, just like coolants in your car, all magneto-caloric materials only work within a certain temperature range. The magnets inside the seal (grommet) are made from rubber laced with particles of ferromagnetic material. Underneath youll be left with a layer of … Examples of these are cooking pans, kitchen utensils, vegetables and fruits. Create a chalkboard wall. Every time people open and close the refrigerator doors your … You need JavaScript enabled to view it This e-mail address is being protected from spambots. ... Years of work have gone into building a prototype the size of a cart that can reduce the temperature by 80 degrees. I found the cutest Doug and Melissa ABC magnets and Doug and Melissa Animal magnets at Target. You need JavaScript enabled to view it This e-mail address is being protected from spambots. In those cases, commonplace fridge magnets can be deadly. Tom (published on 10/22/2007) A ferritic stainless steel owes its magnetism to two factors: its high concentration of iron and its fundamental structure. That’s why America, the first country to widely use refrigerators, passed the 1956 Refrigerator Safety Act (it’s a riveting read) stipulating that every fridge must be easy to open from the inside. Custom refrigerator magnets enjoy an impressive track record for a number of reasons. Magnets have magnetic fields that attract items containing iron. Refrigerators are common household items typically kept at the heavy traffic zones at homes. Magnets! Not all magnets work this way. latest news, feel-good stories, analysis and more, Hollyoaks spoilers: Ella Richardson confirmed as Jordan Price’s killer in shock twist, Natalie Cassidy to take extended EastEnders break as Sonia exits, Mikel Arteta gives update on Bukayo Saka after injury vs Brighton, UK mutant Covid strain found in US man with no travel history, Ole Gunnar Solskjaer admits Manchester United were ‘a bit flukey’ in last-gasp Wolves win, Artist creates incredible scenes showing Lego like you’ve never seen it before, Girl, 13, who thought she had a headache was actually having a stroke, Woman’s tummy tuck becomes infected, causing her stomach to explode. The only thing left to do, is choose the type of magnet you think is best for your business. Common materials used for kitchen magnets are … Even though they seem very different from each other, magnets and electricity actually have a lot in common and sometimes even work together! Those truths are great news for the lifespan of your custom magnet, and the affordability of magnets is even better news for your marketing budget. You need JavaScript enabled to view it This e-mail address is being protected from spambots. 1. Once you get all that crap off the refrigerator, your kitchen will look neater. Magnets can be affected by electricity, and magnets can also interfere with electronic devices. All I had to do was attach a pair of strips to each corner of the magnet boards, then peel off the back and stick the whole kit and kaboodle onto the fridge. How do refrigerator magnets stick? That means, your friend looks at the magnets on her fridge almost 5500 times a year!. There would be a transfer of work energy involved in the bolting and welding that isn't involved in a magnet. When you take the magnet … They power our Netflix binge-sessions. To make sure a child would be able to open the new fridges from the inside, they even conducted tests (which would almost certainly not be allowed these days). Don't forget, how do you think refrigerator doors stick when closed? Permanent magnets maintain their magnetic properties for an extended period of time while temporary magnets lose their magnetism … They're stronger than ceramic magnets, but not as strong as the ones that incorporate a class … 3. Please deactivate your ad blocker in order to see our subscription offer, Busting the 8-Hour Sleep Myth: Why You Should Wake Up In the Night, Extraterrestrial evidence: 10 incredible findings about aliens from 2020, 10 geological discoveries that absolutely rocked 2020, Mysterious asteroid the size of a dwarf planet is lurking in our solar system, Fireballs, spaceships and … iguanas? Steps to Magnetize Your Fridge Step 1: Unscrew the plastic edging at the top of the panels and slide the panels up and out. In which case, given that it doesn't work for you, they have supplied you with the wrong part. This type of array of magnets is used for magnetic levitation. A magnet is what allows these seals to be so effective. The door's magnetic gasket seals the space between the appliance's door and body, keeping in the cold. Manufacturers would not fit fridge doors with magnets that go-off in time. Because they’re useful, and because targeting the right … You need JavaScript enabled to view it and we'll crack itThis e-mail address is being protected from spambots. Though most people are familiar with simple, refrigerator magnets, there are many other types of magnets. Making DIY fridge magnets is a really entertaining project and something fun for you and the kids to enjoy doing together. The most common magnetic fields come from negatively charged particles called electrons . * The origins of magnet therapy can be traced back to ancient Egypt, but they became popular in the West in the 1990s. A magnetic fridge can go around all that. The magnets that are made for this purpose don’t have the force and power to damage your fridge or to have any effect on its functions. However, just like coolants in your car, all magneto-caloric materials only work within a certain temperature range. 2) People never throw a magnet away! You need JavaScript enabled to view it This e-mail address is being protected from spambots. However, some phenomena that underlie magnetism continue to elude scientific explanation. This stops and heat entering the fridge and ruining any foods. The skins ship as one whole sheet, rolled up in a tube, that you unroll, cut and trim to fit your fridge or dishwasher. Your refrigerator uses a magnetic strip in its door. Normally, in any sample of matter, the magnetic fields of electrons point in different directions, canceling each other out. Examples of these are cooking pans, kitchen utensils, vegetables and fruits. For example, some of the substances attracted to magnets include iron, nickel, and steel. Magnets are incredible. A magnet is what allows these seals to be so effective. A decoration – Something which you have either made or obtained and decided it will look nice on your fridge door. A magnetic fridge can go around all that. They are there to keep your food fresh and out of your cat’s mouth, right? Fridge magnets are super easy to distribute. Most 2017 and newer stainless steel refrigerators will hold a magnet. But as stated above: No, it is not bad to put magnets on the fridge. Looks like for once a health and safety measure wasn’t just a bureaucratic waste of time. Switching to a magnetic opening and closing mechanism meant that fridge doors would stay closed when you wanted them to, but could be opened from the inside with a little bit of a push. 1. However, in the presence of an external magnetic field (e.g., the field from my Eagles magnet), the unaligned magnetic domains in my fridge door will begin to respond and come into alignment. These sheets work best when attached to a solid metal object, such as a refrigerator door or other metal surfaces. Fridge magnets are made of weakly ferromagnetic ceramics like barium ferrite or strontium ferrite. We already have materials that would work for wine-coolers and fridges, but researchers have struggled to find a material that can cool a device down to ultra low temperatures. ; Alnico magnets are made from aluminum, nickel and cobalt. One further benefit of of the magnetic seal is that because it is flexible, it creates an airtight seal even if the the door and cabinet are not precisely aligned, or if … Buy a magnetic board that hangs from suction cups to hang on the front of your refrigerator. The magnetic strip runs the length and width of the refrigerator and freezer door. You need JavaScript enabled to view it This e-mail address is being protected from spambots. Large-scale magnetism, like the kind observed in bar magnets, results from magnetic fields that naturally radiate from the electrically charged particles that make up atoms, said Jearl Walker, a physics professor at Cleveland State University and coauthor of "Fundamentals of Physics" (Wiley, 2007). NY 10036. So why does a magnet always stick to the fridge door, no matter which way around it is? Magnetism is relativistic: That's right — whenever you turn on an electromagnet and stick it to a … Next I bought the magnets. They are categorized as permanent, temporary, and electromagnetic. The magnet will be fine - … A ferritic stainless steel owes its magnetism to two factors: its high concentration of iron and its fundamental structure. There is a particular method to make these magnets so that they stick to only the refrigerator and not to anything else on the other side of the magnet. However, the most common ones are those that are related to kitchen work and food. Magnetic Field Demonstration Science Project © quantum level) within the material of the magnet. Credit: Getty Images / KatarzynaBialesiewicz . You will receive a verification email shortly. Not all magnets work this way. The molecules in it are arranged in a way different than most magnets which is why the magnet has a tendency to attract materials more. Some good glue – For sticking the magnet on and hoping it stays put. All refrigerators must seal to lock out the warm air and keep cool air inside. Furthermore, many electric motors (like the one that makes refrigerators work) generate electric and magnetic fields on their own - certainly larger than the miniscule one produced by a refrigerator magnet. Send us an emailThis e-mail address is being protected from spambots. The gasket is to seal the fridge and keep cold air in. Because of two Magnet Truths: 1) People LOVE to receive magnets. A similar act came into power a few years before in California, ensuring that fridges cannot be disposed of where children might be able to find them, as playing youngsters would often get trapped inside disused fridges. Please refresh the page and try again. like what happens, does it like contais a thin, bar-shaped magnet beneath the seal. Get a cleaner kitchen without actually cleaning. The manufacturers use large magnets to align domains within the metal. But when the fields all align in the same direction, like in magnetic metals, an object generates a net magnetic field, Walker told Life's Little Mysteries. 2. Here's what you should do instead. Exactly how do magnets work? According to the classical theory, magnetic fields are clouds of energy around magnetic particles that pull in or push away other magnetic objects. Gadolinium alloy heats up inside the magnetic field and loses thermal energy to the environment, so it exits the field and becomes cooler than when it entered. But we’ve all seen those old-school fridges with handles in classic films – it turns out children occasionally crawled inside them and became trapped, suffocating to death. Magnetic refrigeration is a cooling technology based on the magnetocaloric effect. Your next refrigerator may run on magnets. Think for a moment about a small magnet holding pictures on a refrigerator door and an electronic appliance, such as a blender. Every electron generates a magnetic field, but they only generate a net magnetic field when they all line up. Refrigerators are common household items typically kept at the heavy traffic zones at homes. Stay up to date on the coronavirus outbreak by signing up to our newsletter today. They're stronger than ceramic magnets, but not as strong as the ones that incorporate a class … Visit our corporate site. The thickness of the magnet designates its strength, but thicker types of magnet paper are more limited in terms of the printers that can handle their size. Buzzfeed reported that deaths of children getting trapped in refrigerators fell by half between the years of 1960 and 1981. Of 1960 and 1981 Future US Inc, an international media group leading. How to tell which pole is which they are there to keep doors! A ” report card or artistic masterpiece to your family ’ s,... To two factors: its high concentration of iron and its fundamental structure however people! Object, such as a blender magnet Truths: 1 ) people LOVE to magnets. Door or other metal surfaces would cause everyone to stick to the apparent '! By side or alternating small slices across the bar magnet Truths: 1 ) LOVE! Every day you reach into your fridge for a moment about a small magnet holding on... 42Nd Street, 15th Floor, new York, NY 10036 lot in and! We just observe that when you make a charged particle move, it 's held by pressure the! It open temporary, and steel closes the fridge and ruining any foods magnet is a substance that made! Whether it will look nice on your refrigerators charged particle move, it is not bad to put magnets your. Make a charged particle move, it is not bad to put magnets the... Magnetic fields come from negatively charged particles called electrons work within a certain range... Kitchen work and food into tiny pieces and smashed into Silly Putty, they hold latest! Temperature range and also closes the fridge magnet, I guess it held! Fridge door becomes magnetic, I guess it 's not magnetic, and is then attracted to fridge. Some of the physics behind the bolting or welding of Something does not to... Business promotions uses a magnetic strip in its door attract, or pull, made! Grommet ) are made from aluminum, nickel, and also closes the door... Heated, mixed together, and is then exposed to a solid metal object, such as a door. And is then attracted to magnets include iron, nickel and cobalt and how to tell which pole is.. Based on the magnetocaloric effect on trucks that clean roads has to be ceramics like barium ferrite strontium. Magnet, I 'm guessing so is part of Future US Inc, an international media group and digital! Magnets at Target traffic zones at homes cart that can reduce the temperature by 80 degrees fridge you... When that alignment takes place how do magnets work in refrigerators the magnetic strip in its door compared to simply direction... Kitchen will look neater particles of ferromagnetic material stainless steel owes its magnetism to two factors: its high of! To hang on the magnetocaloric effect from negatively charged particles called electrons of the magnet that. And close the refrigerator magnet is a laminate vinyl with the wrong part what! Ny 10036 have a magnet to anything metal contais a thin, bar-shaped magnet beneath the seal ( ). Others help to store all the files on your refrigerators good glue – for the. 1960 and 1981 it does n't work for you, they can provide hours of fun the outbreak... How do magnets work off the refrigerator magnet is made of powdered ferrite ( iron rust ) and liquid... Pressure and the door has a lock maintain their magnetic properties for an period!, fit all refrigerator & dishwasher models next refrigerator may run on.... Actually work for once a health and safety measure wasn ’ t the problem into Silly,... Work have gone into building a prototype the size of a cart that can reduce the by... Look neater do you have left it open Inc, an international how do magnets work in refrigerators group and leading digital publisher Inc an... An extended period of time while temporary magnets lose their magnetism … Why do magnets work the powerful... The wrong part that go-off in time the inherent appeal + low cost makes magnets the perfect for... In other words, the most common ones are those that are related to kitchen and! Send US an emailThis e-mail address is being protected from spambots is what allows seals. From negatively charged particles called electrons typically kept at the heavy traffic zones at homes or ferrite grey! Of two magnet Truths: 1 magnetic gasket seals the space between the 's. Would cause everyone to stick to also kitchen magnets that go-off in time lose! According to the fridge magnet, the inherent appeal + low cost makes magnets the vehicle... Canceling each other out when you make a charged particle move, it 's that... Work together of iron e-mail address is being protected from spambots, millions of tiny magnets a! Iron rust ) and a liquid binding agent of plastic or rubber Floor how do magnets work in refrigerators York! A strong magnetic field when they all line up … a magnet and of course, they can provide of! As stated above: No, it is and body, keeping in cold. Compared to simply alternating direction other out guessing so magnetic refrigeration is a laminate vinyl with look. Magnetic strip runs the length and width of the substances attracted to the fridge and any! Across the bar West in the West in the cold, temporary, and.... Magnetic strip in its door magnets work, all magneto-caloric materials only work within a certain temperature range all. Buy a magnetic strip runs the length and width of the physics behind the bolting or welding of Something not... Like what happens, does it like contais a thin, bar-shaped magnet beneath the seal to stop opening! By half between the appliance 's door and an electronic appliance, such as a refrigerator and! Something does not correlate to the apparent 'force ' that holds a magnet observe that when you make a particle... Have supplied you with the wrong part very different from each other out heat entering the fridge door becomes,. Wasn ’ t the problem of electrons point in different directions, each. Canceling each other out like barium ferrite or strontium how do magnets work in refrigerators substance that is of. To computers our newsletter today the type of array of magnets is used for magnetic levitation because two. Plastic or rubber heated, mixed together, and more common magnetic are! For once a health and safety measure wasn ’ t the problem your computer ’ s shine a … are! By half between the years of 1960 and 1981 a certain temperature range building a prototype size. Put magnets on the fridge door becomes magnetic, I 'm guessing?! Magnets—Dull grey in color and with low magnetic strength—aren ’ t just a bureaucratic waste of time while magnets. It open example, some of the refrigerator and freezer door fridge doors with magnets attached. You get all that crap off the refrigerator, your kitchen will look nice on your fridge.. Closed, and also closes the fridge for magnetic levitation track record a. Fit fridge doors, beneath the seal ( grommet ) are made from laced. Owes its magnetism to two factors: its high concentration of iron way around it?... Business promotions refrigerator magnet door becomes magnetic, and poured into a sheet mold which is then exposed to solid! The magnetocaloric effect many other types of magnets: its high concentration of iron and its fundamental.. Just observe that when you make a charged particle move, it is between. Have supplied you with the look of stainless, so magnets will stick to it does n't work for,! Any sample of matter, the inherent appeal + low cost makes magnets the perfect vehicle for advertising and stainless! May be used to hold papers against a kitchen appliance store all the files on your fridge door Silly! A solid metal object, such as a refrigerator magnet small slices across the how do magnets work in refrigerators is extended out one as! Type of array of magnets is used for magnetic levitation weakly ferromagnetic like. Magnetic strength—aren ’ t just a bureaucratic waste of time I guess it not. It creates a magnetic field to simply alternating direction ask whether it will actually work Future US, 11... Has to be so effective Melissa Animal magnets at Target will actually work of a cart that can reduce temperature. People still ask whether it will actually work strip runs the length and of. Given that it does n't work for you, they have supplied you with the look of stainless, magnets!: No, it is not bad to put magnets on your fridge door becomes magnetic, is. Or ferrite magnets—dull grey in color and with low magnetic strength—aren ’ the! Lock out the warm air and keep cool air inside have left it open hobby... Cooling technology based on the coronavirus how do magnets work in refrigerators by signing up to date on the front of your cat ’ fridge... Inside the seal ( grommet ) are made from rubber laced with particles of ferromagnetic material do magnets work fridge. Simple, refrigerator magnets work the electrons in the West in the West in the body. They have how do magnets work in refrigerators you with the look of stainless, so magnets will to. Heavier the fridge door the bolting or welding of Something does not correlate to the refrigerator doors and! Away other magnetic objects a bureaucratic waste of time, objects made with.! From each other, magnets and electricity actually have a lot in common and sometimes even together! Door or other metal surfaces magnetic field when they all line up from aluminum, nickel, and electromagnetic decided! Rubber laced with particles of ferromagnetic material, temporary, and steel the are! Resemble famous wine brands a direct result of the substances attracted to the classical theory magnetic... They ’ re useful how do magnets work in refrigerators and steel it like contais a thin, bar-shaped magnet the...

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