[Phys-L] Re: Science "Magic" Demos

[Bernard Cleyet <anngeorg@PACBELL.NET>]

not having read carefully I may've missed the Rijke tube.  The NPS
people have one that works using the temp. difference from lN2 cooling.


"our" archive:

http://lists.nau.edu/cgi-bin/wa?A2=ind0012&L=phys-l&D=0&P=18067


and my more favoured demo:

(conservation of angular momentum of a watch and it balance wheel.)

http://lists.nau.edu/cgi-bin/wa?A2=ind0408&L=phys-l&F=&S=&P=18960


This reminds me of the light lever used to show the movement of a
concrete wall when pushed by someone.  I didn't find it quickly on
PHYS-L, so may be in TPT.

bc, not certain about the above as "magic", but fun.


Florets, Timothy J wrote:

> I volunteered to give a ~ 50 min presentation on "science magic" to
> ~20-30 high school students in about 3 weeks and was hoping some people
> here had some favorites they might like to share.  Hopefully the demos
> will be 1) entertaining, 2) educational, 3) low budget and 4) not too
> difficult to perform.  I plan to present a brief explanation of each
> feat, but no really involved derivations or anything like that.
>
> Some current ideas include
> 1) bed of nails (I'd have to build one soon)
> 2) string tied above & below a heavy weight (slow pull breaks top
> string, quick tug breaks bottom string.
> 3) cabbage juice pH indicator.
> 4) juggling on a force plate (showing that the average force is the same
> whether juggling or not)
> 5) Bernoulli ping pong ball suspended on a stream of air.
> 6) cooling & crushing a container full of steam
>
> Do these sound reasonable?  Any other ideas?  Links to website with
> similar info?  I don't think these will take 10 min each, so I need a
> few more!
>
> Thanks in advance.
>
> Tim Folkerts
_______________________________________________
Phys-L mailing list
Phys-L@electron.physics.buffalo.edu
https://www.physics.buffalo.edu/mailman/listinfo/phys-l