Magnets Definition and 538 Threads

:confused: What store can I buy iron fillings from? And also wire and magnets to go with it.

I have a quick question here, and essentially, I'm wondering what are the differences between a ferrous magnet (more specifically, iron) and a non-ferrous magnet? How would you distinguish between the two? Thanks in advance; any help would be greatly appreciated.

My physics teacher explained to our class the traditional "dropping a magnet through a tube" experiment. As we all know, it slows down and takes longer than usual to fall through. However, he gave us an explanation that I am unsure about. I seem to remember reading about a different explanation...

help pls! since electrons cr8 a magnetic field due to their spin, shouldn't atoms be magnetic? o0

It is well known the magnetic force cannot do work. What causes a magnet to move in the precense of another magnet? Does the magnetization of the two magnets diminish in the proces?

Is there any way to concentrate the magnetic field of magnets like a bar magnet at a point?

HI How does a magnetic field build in a natural magnet like iron from a quantum mechanical point of view? I know it has to do with electrons spin and their orbital momentum, but how exactly does it work in a magnet? thanks

Anyone want to help w/ phys homework? It's magnets... Hello! I would SOOO appreciate any help I could get with this homework of mine! I just don't understand and my phys instructor is mean! Anyway, it's Phys 110, so it should be pretty easy for some of you, but it's hard for me... Any...

Hi everyone, I just found this forum and am happy I did, being the only physics major in my physics 200 classes (community college :( ), I feel kind of isolated. Groups of people talking about computer science classes, engineering, and I'm alone, and my instructor/advisor still asks me...

I've seen these things for sale on the web. http://www.amasci.com/neodemo.htmlhttp://www.kjmagnetics.com/safety.asp I consistently see the same claims: - they can easily pinch skin, like with a pair of pliers - they can shatter, showering you with high speed shards Are they really...

If I have a magnet of known strength (say 3 Tesla) and I have a solid iron sphere of 1 kg and it is positioned 2m from the magnet, how do I go about calculating its acceleration and so its final velocity upon reaching the magnet? Do I need to worry about gravity and starting height? I'm...

If you take 2 high powered magnets let's say the size of a silver dollar and put both in a table vice with neg poles facing each other, add some strong adhesive (superglue, gorila glue) and crank them together till the cement dries, with the same poles pressed together will this cause...

When playing around with magnets, one can notice that they attract objects from a distance. No only that, but they can also attract quite heavy objects many, many times in a row. Where does the energy that moves the objects come from/stored? Does it ever "run out"? My guess is that magnets...

What causes the force of attraction between two permanent magnets? I'm well aware that F = qv x B, but what charges are moving?

I am a bit confused about the concept of magnets. It is said that magnets attract opposites, and repel likes. Now does that refer to the material, or a magnet being attracted/repelled by another magnet? Also... If an electromagnetic apparatus is strong enough, will attract/pull just about...

I want to ask about the applications of magnets Is it possible that people who lived in a town could have health problems such as headaches, nausea, brain tumors.. due to an established plant, which distributes power to nearby towns and cities through hundreds of high-tension cables...

When a magnet is used to lift up a paperclip, clearly it gains gravitational potential energy. Where does this energy come from? Does the magnet lose energy to the paperclip? Does the magnet regain this energy when the paperclip is removed from the magnetic field? I have never heard of the...

how are lines of induction formed due to 2 horseshoe magnets that are placed side by side but no contact? Are there websites that would show me about it?

im only 15 n very interested in magnets, so i have many questions. can magnets have different strengths, and if so, how is this strength messured? What would happen to a magnet if it cannot turn or twist to make the oposite poles attract, and was stuck with like poles close together? that's all...

Ok, I am not the kind of person who likes BIG words, so this is all going to be simple. My question is this, what would happen in you polarized the haul of a spaceship say negitive(Doesn't really matter if its neg or pos), then generated an opposite field of energy behind. It would act like...

Hello all. I have a couple of questions concerning static electricity, magnets, and dissimilar materials. My first question is can a permanent magnet moved past a dissimilar material be used to give it a static charge as if the magnet were a dissimilar material of opposite charge? My second...

So a non-physicist posed a question to me the other day. He said that he heard something once that if two pennies are within close proximity of a magnet for at least a few hours, they gain some magnetic charge. When removed, they will slightly attract or repel one another. So I tried it. I...

why can certain metals be magnetised but others like copper cannot? what what is the difference between permanent magnet and temporary magnets?

I am posting this here because I have not been able to find the answer anywhere else. I know some of you might find this quite dumb of me, since I have seen some quite learned scholars in this forum, and my question is pretty basic. I am aware I might not be in the right forum. My...

Is it possible to use magnets (donut shape) to float a carbon arrow in the center of the donut (LEVITATION USING CARBON.

OK i was just wondering what would happen if you had a bunch of Iron filings at absolute zero and put a magnet near to them. Would they move or would nothing happen?

i'm sure some of you are familiar with a gauss rifle. I'm doing an experiment using the magnets and marbles. does this at all relate to the gauss rifle guns.thanks

an old 'newbie' with first post. excuse my physics knowledge it has been a long time since college. >>>QUESTION below<<< Magnets repel (each other). If repelling 'each other' through a plane (ex. piece of glass) and water is allowed to flow over the plane. WHAT will happen to the water when...

Hi, Is it possible for two objects of nearly the exact same size, mass, and magnetic field strength to form something analogous to a curved space orbit in a relatively flat space by balancing inertia with magnetism? In other words, can two mutually magnetic objects orbit around a common center...

How do I figure out how much electricity would be generated by dropping a magnet down a coil of wire? What are the specific variables that would determine this? Is the number of coils more importants than the thickness of the wire and If it does generate electricity what's the best way to store...

Hey everyone, got a quickie for u. I'm not sure if there is a proper answer for this question, but could ppl give me brief theories to why superconductors repel magnets no matter what polarity they are. thanks for any input!

Check this site address out: http://scitoys/scitoys/scitoys/magnets/gauss.html It is a neat little science project site, and I found this project the most interesting (except for the non-elecricity requiring radio) on their site. How it tells you it works(shortened): You take a ruler and...

ok, I'm on my cell so forgive the spelling :) This question will be in stages so no one posts all the answers at once and nobody else gets to have fun... First Thing: let's explain How electricity is generated when sliding it through coils of wire. The equations would be very nice also, if...

DO NOT TRY THIS EXCEPT ON A JUNK TV OR MONITOR If you hold a strong permanent magnet up to a T.V. screen while it is on, the magnetic field does some really intriguing warping of the image. When you take the magnet away the image goes back to normal except that the color is now patchy and in-...

I am building a little experiment to demonstrate the impact of metal objects. It consists of the following two configurations: Magnets used are grade N38 NdFeB rare Earth magnets. ##RM## - Cylindrical magnet that is 1 1/2" long x 1/2" diameter laid lengthwise CM - 1/2" cube magnet B -...

http://www.wondermagnets.com/cgi-bin/edatcat/WMSstore.pl?user_action=detail&catalogno=3138 I'm thinking of getting some, I just purchased some neodymium magnets. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2545710646

My physics teacher gave the class a brief explanation of a permanent magnet. If I understood him correctly he basically said the special condition with a permanent magnet is that all the electrons are circling uniformly (in same direction). The poles of the magnet are based on the direction the...

A physics experiment with magnets and a vote pole-results This is an experiment with magnets in motion. The question is that if one magnet is spinning along a circular plane such that the north end arrives at a point on the circle just as often as the south end, then what will happen if...