"JW" wrote in message
...
On Tue, 22 Jun 2004 13:06:08 GMT (Steve J.
Noll) wrote in Message id: :

Have you tried the drop a magnet down a
copper pipe trick?

I'll bite. What happens?

I'm guessing some EMF is induced.

"PM"

Steve Nosko wrote:

"Steve J. Noll" wrote in message
...

On Tue, 22 Jun 2004 08:21:58 GMT, "Greysky"
wrote:


ever since I was a child, magnets have held a fascination for me. ...


They are magic, aren't they? Have you tried the drop a magnet down a
copper pipe trick?


Now how come I never thought of that one. Know what i'll be doing this
evening...


Hey fun! I knew about the effect, but never thought to try it with
something so mechanically simple. I'm going to have to show the kids now.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

JW wrote:

On Tue, 22 Jun 2004 13:06:08 GMT (Steve J.
Noll) wrote in Message id: :

Have you tried the drop a magnet down a
copper pipe trick?

I'll bite. What happens?

http://my.execpc.com/~rhoadley/magpipes.htm

"Steve Nosko" wrote in message
...

"Steve J. Noll" wrote in message
...
On Tue, 22 Jun 2004 08:21:58 GMT, "Greysky"
wrote:

ever since I was a child, magnets have held a fascination for me. ...


They are magic, aren't they? Have you tried the drop a magnet down a
copper pipe trick?

Now how come I never thought of that one. Know what i'll be doing this
evening...

Chuckle chuckle...anyone have a silver pipe?


Steve N, K,9;d, c. i My email has no u's.

"Paul_Morphy" wrote in message
...

"JW" wrote in message
...
On Tue, 22 Jun 2004 13:06:08 GMT (Steve J.
Noll) wrote in Message id: :

Have you tried the drop a magnet down a
copper pipe trick?

I'll bite. What happens?

I'm guessing some EMF is induced.


....and... continue with the line of reasoning...

What does that EMF produce and where?...

--
Steve N, K,9;d, c. i My email has no u's.

what does it do??


They are magic, aren't they? Have you tried the drop a magnet down a
copper pipe trick?


Now how come I never thought of that one. Know what i'll be doing this
evening...


Hey fun! I knew about the effect, but never thought to try it with
something so mechanically simple. I'm going to have to show the kids now.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Hi, I don't know how powerful the magnets you have but I picked up these
3/4 inch sphere magnets on ebay. I have never seen any magnet so powerful.
Amazing!!!! These are not toys for kids!!!!!


One of his auctions.
http://cgi.ebay.com/ws/eBayISAPI.dll...m=55031753 63

http://www.kjmagnetics.com/

Have fun

==================================================


Greysky wrote:

ever since I was a child, magnets have held a fascination for me. I've been
collecting them ever since. It used to be that you could always scrounge
loudspeakers for Alnico magnets. Then when the newer ceramic magnets began
to be incorporated into loudspeakers, it became a challenge to remove them
from their enclosures without breaking them. Now, I have to admit, I am
having a ball collecting the new 'super magnets' - like the ones inside hard
drives. There are also cool cylindrical magnets that you can get from inside
the heads of VHS machines. My question is does anyone know of other sources
either for Neodymium 'duper magnets', or strong ceramic magnets that I may
be missing out on? Magnets like these come closest to being perpetual motion
machines we have yet to make, and I'd hate to have some just wind up into
the trash because I didn't know they were there :-)

Thanks.!

In article , Steve wrote:

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Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit

what does it do??

They are magic, aren't they? Have you tried the drop a magnet down a
copper pipe trick?

The magnet moving down the pipe induces eddy currents. These eddy
currents produce an electromagnetic force that resists the movement of the
magnet (with respect to the pipe) and does so to an extent varying
directly with the speed at which the magnet is moving. This slows down
the magnet.

At least this is what I have heard.

And aluminum tubes do this also, just not quite as much as copper ones
do. And I have seen aluminum tube stock.

Most other metals do this less, but I imagine that iron and lead pipes
may slow the fall of a close-fitting "rare earth magnet" a little in
comparison to nonconductive pipes.

- Don Klipstein )

"Jan Panteltje" wrote in message
s.com...
On a sunny day (Tue, 22 Jun 2004 08:21:58 GMT) it happened "Greysky"
wrote in
:

ever since I was a child, magnets have held a fascination for me. I've
been
collecting them ever since. It used to be that you could always scrounge
loudspeakers for Alnico magnets. Then when the newer ceramic magnets
began
to be incorporated into loudspeakers, it became a challenge to remove
them
from their enclosures without breaking them. Now, I have to admit, I am
having a ball collecting the new 'super magnets' - like the ones inside
hard
drives. There are also cool cylindrical magnets that you can get from
inside
the heads of VHS machines. My question is does anyone know of other
sources
either for Neodymium 'duper magnets', or strong ceramic magnets that I
may
be missing out on? Magnets like these come closest to being perpetual
motion
machines we have yet to make, and I'd hate to have some just wind up into
the trash because I didn't know they were there :-)

Thanks.!
There is a big magnetic iron core if you dig deep enough.
There are stars with an extremly strong magnetic field,
very very strong.
We need a composite (non metal) spaceship.
hehe

Actually, I think the metaphasic shield gets around that problem.

Cheers!
Rich

In article ,
Don Klipstein wrote:

Most other metals do this less, but I imagine that iron and lead pipes
may slow the fall of a close-fitting "rare earth magnet" a little in
comparison to nonconductive pipes.

#chuckle#

More than a little, in the case of an iron pipe!

--
Dave Platt AE6EO
Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior
I do _not_ wish to receive unsolicited commercial email, and I will
boycott any company which has the gall to send me such ads!