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Posted 13 November 2007 - 02:54 PM
The non-magnatized bar would be attracted on the positive end and repelled on the negative end.
Posted 17 November 2007 - 02:21 AM
Maybe hold one near the other, and see if you feel a pull with the one you're holding. If you do, the other one is magnetic. If you don't, it's the one your holding.
That's only a guess.
Posted 17 November 2007 - 08:14 PM
Posted 24 November 2007 - 08:56 AM
Posted 28 November 2007 - 07:49 AM
Posted 30 November 2007 - 02:29 AM
Posted 02 December 2007 - 01:24 AM
assuming the magnetic field is strong enough for you to feel the attraction between the 2 rods.
you place 1 iron rod on the floor (or ground, whatever)
and slide the end of the second rod slowly along with the iron rod on the ground, without touching it.
the attraction is weaker at the middle of the magnetic rod, because thats where the poles cancel eachother out.
So, if the magnetic rod is lying on the floor, you will feel greater attraction at each end of the the stationary rod.
and if the non-magnetic rod is lying on the floor you will feel equal attraction at any place on the rod because you are always affecting it with the same pole.
This does assume that the magnetic force is enough for you to feel it. if it isn't then the gravitational field of the earth is your only option.
Posted 02 December 2007 - 09:09 PM
Magnet - Back to the Logic Puzzles
This is a logic puzzle published in Martin Gardner's column in the Scientific American.
You are in a room where there are no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify this magnet?
Well, magnets are stronger at the poles, and so you simply need to rub the two rods together. Firstly you take Rod A and hold it horizontally. Then you take Rod B and rub its one pole against the one pole of Rod A. Then, if you move Rod B along Rod A horizontally and the attraction becomes less, then you know that Rod A is the magnet. If the attraction stays the same, then Rod B has to be the magnet.
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Posted 03 December 2007 - 10:48 PM
Posted 03 December 2007 - 10:50 PM
Is there a door knob on the door which is not tecnichally in the room if the door opens out? because if there is you would simply use the doorknob.
I don't understand? Care to explain a bit?
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