Re: [asa] Easy to show experiments

Loren posted, in part:

>Now combine the above activities with the following activities:
  5) Get a large cup full of ping-pong balls and an equally large cup
full
of small marbles or bee-bees. Mix them together. The final volume will
be LESS than two cups because the smaller spheres can fit in spaces
between the larger spheres.
  6) Now get two graduated cylinders. Get 50 milliliters of water and 50
milliliters of isopropyl alcohol. Pour them together. The final volume
will not be 100 ml, but about 98 ml. >

#5 looks interesting, for it illustrates the principle of my sugar-water
mixture. #1 thru 4 are too complex. #6 does not show enough difference
(2% may be measurable but in not impressive to a child (I think).

Another source suggested using powdered sugar instead of granulated --
this seems like a useful suggestion.

What is the simplest way to show the double slit phenomena? I mean --
REALLY simple.

Burgy

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Received on Fri Sep 14 16:44:17 2007