liam.mccaffrey
|
| posted on 21/7/10 at 09:53 PM |
|
|
Magic Trick (sort of)
get a piece of copper or ali thick wall tube and drop a neodymium magnet down the middle.
hours of fun, i can't stop doing it!
if you haven't got the gear to try search Eddy current damping 
Build Blog
Build Photo Album
|
|
|
|
|
loggyboy
|
| posted on 21/7/10 at 09:59 PM |
|
|
Science is cool
http://www.youtube.com/watch?v=nrw-i5Ku0mI
|
|
|
BenB
|
| posted on 21/7/10 at 10:05 PM |
|
|
It's evil. Burn it, burn it!!!!!!!!!!!!!
|
|
|
cadebytiger
|
| posted on 21/7/10 at 10:09 PM |
|
|
Science is Cool! -
Get two large washers,
Connect a wire to each,
separate the washers slightly using insulating strips (1mm thick),
connect the wires to a laptop charger (the use of a female adapter (maplin) is handy, - i think the laptop charger i used was about 19V output
submerge the washers in water with a little backing soda,
bubbles of hydrogen and oxygen will form on the surface
cover ears...
add match ... BANG  hours of fun
|
|
|
dinosaurjuice
|
| posted on 21/7/10 at 10:16 PM |
|
|
dip the copper tube in liquid nitrogen and youll have days of fun 
|
|
|
blakep82
|
| posted on 21/7/10 at 10:30 PM |
|
|
there;s anti gravity at work right there!
________________________
IVA manual link http://www.businesslink.gov.uk/bdotg/action/detail?type=RESOURCES&itemId=1081997083
don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
|
|
|
matt_gsxr
|
| posted on 21/7/10 at 10:31 PM |
|
|
Real men do it with superconducting MRI scanners.
alloy_block_in_MRI_scanner
Obviously, steel would not be a good idea.
Matt
|
|
|
cadebytiger
|
| posted on 21/7/10 at 10:33 PM |
|
|
That is awesome!!!
|
|
|
blakep82
|
| posted on 21/7/10 at 10:35 PM |
|
|
what does the liquid nitrogen do then?
________________________
IVA manual link http://www.businesslink.gov.uk/bdotg/action/detail?type=RESOURCES&itemId=1081997083
don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
|
|
|
dhutch
|
| posted on 22/7/10 at 01:07 AM |
|
|
quote:
Originally posted by loggyboy
Science is cool
http://www.youtube.com/watch?v=nrw-i5Ku0mI
Thats awesome.
- Never done it, but im tempted to get a magnet and some tube now!
|
|
|
BenB
|
| posted on 22/7/10 at 09:41 AM |
|
|
quote:
Originally posted by blakep82
what does the liquid nitrogen do then?
Yeh- that's got me interested Got some of that hanging around at work
|
|
|
jossey
|
| posted on 22/7/10 at 09:43 AM |
|
|
logans paste.
ermmm
no this is fun.
get some iodine tincture from your local vet place.
add a little hydrocloric acid.
this brings the crystals to the top. get them out using filtration.
now add around 1 tablespoon of crystals into a plastic container.
dont worry its safe so far.
add 50ml of ammonium hydroxide.
stir till no more bubbles are made.
and then paint on someones car door or on stones on a drive or on peoples milk bottles.
the size of a 1/4 of a 5p piece will sound like a little fire cracker when touched and not hurt them just give people a shock :O)
have fun.
then when your bored make thermite :O)
dave j
|
|
|
cadebytiger
|
| posted on 22/7/10 at 10:01 AM |
|
|
quote:
Originally posted by jossey
ermmm
no this is fun.
get some iodine tincture from your local vet place.
add a little hydrocloric acid.
this brings the crystals to the top. get them out using filtration.
now add around 1 tablespoon of crystals into a plastic container.
dont worry its safe so far.
add 50ml of ammonium hydroxide.
stir till no more bubbles are made.
and then paint on someones car door or on stones on a drive or on peoples milk bottles.
the size of a 1/4 of a 5p piece will sound like a little fire cracker when touched and not hurt them just give people a shock :O)
have fun.
then when your bored make thermite :O)
dave j
oooooo that sounds like fun - what strength of HCL?
|
|
|
David Jenkins
|
| posted on 22/7/10 at 12:15 PM |
|
|
Is that nitrogen tri-iodide?
Made that stuff as a teenager... blogs of it, surrounded by blobs of jam. It was my way of getting revenge on wasps.... Mwahahahaha!
|
|
|
Agriv8
|
| posted on 22/7/10 at 03:40 PM |
|
|
quote:
Originally posted by BenB
quote:
Originally posted by blakep82
what does the liquid nitrogen do then?
Yeh- that's got me interested Got some of that hanging around at work
IIRC nitrogen cools the copper thus becomes more conductive ( so resists the magnet more ) cetainy the reason to keep super computers cool is
A stop the tracks melting but as the copper is better an conducting electricity you can get the on / off signals closser to gether therefor more
data.
remembered from doing Computer studies at school 22 ( yikes !!!) years ago !!
Regards
Agriv8
[Edited on 22/7/10 by Agriv8]
Taller than your average Guy !
Management is like a tree of monkeys. - Those at the top look down and see a tree full of smiling faces. BUT Those at the bottom look up and see a
tree full of a*seholes .............
|
|
|
mrwibble
|
| posted on 22/7/10 at 05:09 PM |
|
|
quote:
Originally posted by matt_gsxr
Real men do it with superconducting MRI scanners.
alloy_block_in_MRI_scanner
Obviously, steel would not be a good idea.
Matt
surely that level of magnetic radiation is harmful?
|
|
|
iank
|
| posted on 22/7/10 at 05:30 PM |
|
|
Big magnet dragging aluminium and copper around using eddy currents.
http://www.youtube.com/watch?v=7DUD5WIwUAo
iirc they use this effect to separate aluminium drinks cans from plastic at recycling plants.
Edit: youtube even has a video
http://www.youtube.com/watch?v=4GC5--8ff3E
[Edited on 22/7/10 by iank]
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
|
|
|
