Date: Fri, 22 Sep 2000 07:03:53 -0400

Author: Gerald Zani

Subject: Re: ball and feather - 1C20.10

Post:

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Jerry,

It is a good thing I don't use the feather. I use a small piece of tissue
paper colored with flourescent hi-liter so it glows brightly with a UV lamp.
It has never stuck to the walls. See
http://www.physics.brown.edu/Studies/Demo/solids/demos/1c2010.html

At 03:48 PM 9/21/00 -0600, you wrote:
> Our ball and feather apparatus does not work as well as it should.
There
>seems to be a static attraction between the feather and the cylinder wall
>which causes the feather to hang up and arrive at the bottom well after the
>ball (it's a dead ball, does not bounce). Does anyone else have this
>problem? Do you use a special feather, or some kind of anti-static
>treatment? Thanks for any suggestions...
>

Fall in N.E. now, colorful foilage, red mac apples, orange pumpkins for
carving, sweet corn for munching. Life is good now. Then comes old man
winter.
JZ
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Jerry,



It is a good thing I don't use the feather.  I use a small piece of
tissue paper colored with flourescent hi-liter so it glows brightly with
a UV lamp.  It has never stuck to the walls.  See

http://www.physics.brown.edu/Studies/Demo/solids/demos/1c2010.html



At 03:48 PM 9/21/00 -0600, you wrote:

>       Our ball and
feather apparatus does not work as well as it should.  There

>seems to be a static attraction between the feather and the cylinder
wall

>which causes the feather to hang up and arrive at the bottom well
after the

>ball (it's a dead ball, does not bounce).  Does anyone else have
this

>problem?  Do you use a special feather, or some kind of
anti-static

>treatment?  Thanks for any suggestions...

>



Fall in N.E. now, colorful foilage, red mac apples, orange pumpkins for
carving, sweet corn for munching.  Life is good now. Then comes old
man winter. JZ


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