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Magnet


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103 replies to this topic

#71 cjleee

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Posted 23 January 2008 - 03:05 AM

A rod shaped magnet has no magnetization in the middle. So take one rod and see if its middle and one end of the other rod attract each other. If they do, then the first rod is the simple metal. If they don't then the other way around.
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#72 funandatraveler

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Posted 03 February 2008 - 11:58 PM

WELL. i dont know about you, but i imagine myself wearing jeans; therefore, i have a metal button. they only said there was no other metal in THE ROOM specifically, and i am not a peice of THE ROOM.




I agree that this would be the fastest and most reliable way. It makes me wonder if any of these people actually tried their ideas!
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#73 vaporvic

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Posted 06 February 2008 - 07:29 PM

[quote name='rookie1ja' date='Mar 30 2007, 10:30 AM' post='54']
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?

How old am I? What is the diameter of the rods?

I think I would put the end of one of them in my mouth and see if it reacts to my fillings. :D
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#74 bard1290

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Posted 15 February 2008 - 05:43 AM

I thought about this all day, and after coming up with a solution I was surprised to come home and read that the provided solution actually seemed much more complicated than the one I came up with, it's usually the other way around.

Alternate solution: Break one or both rods and the one who's pieces attract or repel eachother is your magnet.


i thought of exactly the same thing...and i agree with you.
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#75 sk8rkat

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Posted 16 February 2008 - 01:11 AM

couldnt you just put both rods together and see which one has more of a connection with the other?
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#76 queen

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Posted 18 February 2008 - 10:22 PM

Did anyone know that if you hang an iron rod from a string after a few days it will become magnetized, this is how natural magnets are formed when iron ore is lying north to south in the ground...
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#77 old school

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Posted 29 February 2008 - 01:28 PM

If theirs no files or disks, then theirs no string!
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#78 8dividedby12

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Posted 07 March 2008 - 03:16 AM

who cares rub the two together in the same direction over and over again and now you have 2 magnets.
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#79 nikki1028

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Posted 17 March 2008 - 01:57 AM

After looking at the solution... I have one question..


If there is NOTHING In the room but the iron rods, where do the pieces of string come from? :huh:
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#80 Terri

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Posted 20 March 2008 - 11:10 PM

Can't you hold each iron rod close to your watch, one at a time, and see which affects it?
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