hours of fun, i can't stop doing it!
if you haven't got the gear to try search Eddy current damping
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
Science is cool
http://www.youtube.com/watch?v=nrw-i5Ku0mI
It's evil. Burn it, burn it!!!!!!!!!!!!!
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
dip the copper tube in liquid nitrogen and youll have days of fun 
there;s anti gravity at work right there!
Real men do it with superconducting MRI scanners.
alloy_block_in_MRI_scanner
Obviously, steel would not be a good idea.
Matt
That is awesome!!!
what does the liquid nitrogen do then?
quote:
Originally posted by loggyboy
Science is cool
http://www.youtube.com/watch?v=nrw-i5Ku0mI
quote:
Originally posted by blakep82
what does the liquid nitrogen do then?
Got some of that hanging around at work
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
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
- what strength of HCL?
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!
quote:
Originally posted by BenB
quote:
Originally posted by blakep82
what does the liquid nitrogen do then?
Yeh- that's got me interested
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
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]