On Tue, 22 Jun 2004 08:21:58 GMT, "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.!


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

Steve J. Noll | Ventura California |
| The Used High-Tech Equipment Dealer Directory
| http://www.big-list.com
| The Peltier Device Information Site:
| http://www.peltier-info.com

"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...

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

"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...

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



I just tried it with a 1/2 inch copper pipe and a 1/4 inch cube magnet.
Incredible! I did not know it would have that much of an effect!

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

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

In article , Steve wrote:

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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 )

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!

"Don Klipstein" wrote in message
...
In article , Steve wrote:

--------------9002068B3CF78CE28C8CE7B3
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.

Well, iron for sure.

"Don Klipstein" wrote in message
...
In article , Steve wrote:

--------------9002068B3CF78CE28C8CE7B3
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.


I imagine an iron pipe would slow its fall speed to zero.

;-)

"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.