Q:You have been given the task of describing the theory of magnetic domains to a class of 5th graders. You have enough large paper arrows to give one to each student. Describe your plan to show them the domain nature of - A non-magnetic material - A permanent magnet - An electromagnetRemember that your description of the activities should be about the domains of the magnet and not its polarity.

the web page (below) provides: A magnetic domain is region in which the magnetic fields of atoms are grouped together and aligned. In the experiment below, the magnetic domains are indicated by the arrows in the metal material. You can think of magnetic domains as miniature magnets within a material. In an unmagnetized object, like the initial piece of metal in our experiment, all the magnetic domains are pointing in different directions. But, when the metal became magnetized, which is what happens when it is rubbed with a strong magnet, all like magnetic poles lined up and pointed in the same direction. The metal became a magnet. It would quickly become unmagnetized when its magnetic domains returned to a random order. The metal in our experiment is a soft ferromagnetic material, which means that it is easily magnetized but may not retain its magnetism very long. see picture at web page too!

Q:Hello, I am in the process of designing a suitcase in one of my classes. The design of the suitcase would involve some fairly strong magnets. I was wondering if using magnets would affect a plane‘s controls in anyway, or if they would set off security alarms. If so, what is the lowest magnitude I could use with out affecting the airplane or security?Thanks

Do it It ain't gonna effect anything Unless they carry your bags in the Cockpit Then it might mess with the Whiskey Compass But they also have GPS. . . Gotta Fly. . . .

Q:Has it got to do with the magnetic orientation of electrons ?

Bar Magnet The lines of magnetic field from a bar magnet form closed lines. By convention, the field direction is taken to be outward from the North pole and in to the South pole of the magnet. Permanent magnets can be made from ferromagnetic materials. The magnetic field lines of a bar magnet can be traced out with the use of a compass. The needle of a compass is itself a permanent magnet and the north indicator of the compass is a magnetic north pole. The north pole of a magnet will tend to line up with the magnetic field, so a suspended compas needle will rotate until it lines up with the magnetic field. Unlike magnetic poles attract, so the north indicator of the compass will point toward the south pole of a magnet. In response to the Earth's magnetic field, the compass will point toward the geographic North Pole of the Earth because it is in fact a magnetic south pole. The magnetic field lines of the Earth enter the Earth near the geographic North Pole.

Q:…besides the obvious….I am planning a business trip to Sydney in a couple of months and I need to start preparing.

Yes, there are other planes of existence, when we astral project, only our essence leaves our bodies, you are invisible but, only to those that are still on our physical plane, you can communicate with the entities that belong on the other planes or other people who are on the astral plane at the time. The image of yourself that is projected, is objective, if you see yourself as a mythological creature on the astral, that is what everyone and everything on the otherside sees. Just because too many people are too narrow-minded to think outside the box doesn't mean that everyone who does, belongs in a mental institution! That's the problem with people these days, no hope, no faith and no imagination. Hold onto your open-minded views, no matter other people think, life is more fun if you don't confine everything to a box.

Q:If you‘re stationary in an electric field, you only feel one force, the electric force. When you move, on the other hand, you experience two. The electric force and the magnetic force. Why is this? This doesn‘t happen for gravity. When you move in a gravitational field, you don‘t experience a secondary force, so what causes the spontaneous generation of another force (magnetic force) just because of your velocity through the electric field?

the reality that transferring charged debris produce a magnetic container and that magnetic feild is perpendicular to the route of action are basically homes of all charged debris, its basically there. like the pressure on a body is mass cases acceleration. they're only actual homes of matter, and we use math to placed remark wisely into the fashions that we construct. The magnetic container is only a pressure container like electric powered container and gravitational container etc. you won't be able to fairly see them besides the indisputable fact that the fields are basically a great way of representing the outcome of electromagnetism and gravitation etc.

Q:Since radio waves are electromagnetic waves propagating by way of both an electrical component and a magnetic component, I‘m wondering if the modulating information exists in both the electric field and in the magnetic field simultaneously, or just in the electric field alone?

you're puzzling time-area with frequency-area. whilst a 'provider' is modulated via (prolonged via) yet another sine wave, there'll be 4 words in the ensuing expression. the two unique frequencies, their sum, and their distinction. it extremely is the sum and distinction words that comprise all the modulation advice. Doug

Q:My A-level book doesn‘t cover this, and while it‘s not included in the syllabus, i‘d really like to know:1- What causes unlike particles to attract and vice verse?2- Why do magnets exist only as dipoles?3- What would be the significance of finding a magnetic monopole?4- What exactly makes up a magnet? (Particle wise)5- What causes magnets to attract some materials more strongly than others? (if at all)?6- Why is gravity weaker than all the other forces?

1. It attracts becasue they are in the presence of eachothers electric field and therefore have an unstable energy (A Potential energy). The charges will feel a force that is describe by columbs law. If you were to ask why on the other hand.i would have to say that its just the way the universe works.there is no way to answer that question 2. Becasuse there are only two ways to have a magnetic field (As far as the current accepted physics is concerned). One is by a charged particles moving in a curled path (This is the only way we can create a magnetic field.and it is the way we observe them naturally in the macroscopic universe). The second is by a fundamental property of particles known as the spin. The spin seems to mirror a particle actually spining and hence a charge rotating creates a magnetic field.except that the charge is not actually spinning. This is one of the quantum numbers. Both these methons produce dipole fields. There have been no observed monopole magnetic fields in nature 3. This one i am not sure about. All i could say would be that it would one of the most important discoveries in history 4. atoms. The electrons revovle around the nuclei and cause magnetic fields. The uniqure feature of magnet is that a large percentage of the magnetic moments created from the revovling charges are lined up. When they are aligned like that there magnetc field strensts add 5. I would guess that it depends on how easilly the atoms in atoms in the material could be rotated by the magnetic field and aligned. Also depend on the temperature of the object. Also depends on the conductivity of the object (guess). 6. It is unkown why gravity is weaker. That question is like asking why was the universe created in teh first place.

Q:why does the rock of the ocean floor have a pattern of magnetic stripes i reallly need help thnks

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Q:essentially what i‘m looking for is a material that i could place in between a screw and a magnet that would stop the magnet from attracting/ repelling the screw. i am aware that any material that is thick enough will prevent it but i am looking for something that is smaller and more compact then a stack of paper

The only magnetic screening material available is a sheet of iron. But the iron sheet will probably be turned into a magnet itself ( by induction ) and so you might not be any better off. Anyway to put the screw in place before the magnet is in place?

Q:A long thin solenoid has 460 loops of wire per meter, and a 28-A current flows through the wire. If the permeability of the iron is 3000u (mu_0) , what is the total magnetic field inside the solenoid?(answer in Teslas)I have tried this problem and am struggling to find the correct answer. PLEASE HELP!Thanks A Million

No of turns2500x20/a hundred500turns Flux 500x present day/reluctance Reluctance length/(areax4pix10^ -7) 0.2/(4pi^2x(0.a million/2)^2)2x10^7. InductanceN^2/(2x10^7)0.0125 henries capability savedIntegeral(Ldi/dtXi)xdt(0.0125)x1 watts