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Re: If it doesn't work...

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At 10:43 PM 10/6/98 +0200, Mark Sylvester wrote:
This year I decided to leave the gold leaf electroscopes in the cupboard
and introduce electrostatics with those nice experiments with sticky tape
that were described here a short while back.

I've used the electrostatic sticky tape demonstration for several years,
generally following a discussion of the ancient Greeks and the rubbing of
amber. What you do with the tape is have the students get two strips of tape,
maybe 15 cm long or so. Have them fold one end of each strip over to make a
"handle" . Then have them stick the tape to their desk sort of side by side.
I have them rub the tape a bit. Then have them peel the tape off the desk.
If
held with the non sticky sides facing each other, they should repell. Next,
have them stick one of the strips back onto the surface of the desk. Next the
other peice of tape is place exactly over the first tape strip. Rub as
before. When the tape is removed, the strips will attract each other.

I find that the students are fascinated with this activity. But I don't
use it
to replace the electroscopes - we do that as well.

Glenn
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Physics Kahuna
Kahuna Physics Institute - on the flapping edge of physics research.
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<html><div>At 10:43 PM 10/6/98 +0200, Mark Sylvester wrote:</div>
<div>&gt;This year I decided to leave the gold leaf electroscopes in the
cupboard</div>
<div>&gt;and introduce electrostatics with those nice experiments with
sticky tape</div>
<div>&gt;that were described here a short while back.</div>
<br>
<div>I've used the electrostatic sticky tape demonstration for several
years, generally following a discussion of the ancient Greeks and the
rubbing of amber.&nbsp; What you do with the tape is have the students
get two strips of tape, maybe 15 cm long or so.&nbsp; Have them fold one
end of each strip over to make a &quot;handle&quot; .&nbsp; Then have
them stick the tape to their desk sort of side by side.&nbsp; I have them
rub the tape a bit.&nbsp; Then have them peel the tape off the
desk.&nbsp; If held with the non sticky sides facing each other, they
should repell.&nbsp; Next, have them stick one of the strips back onto
the surface of the desk.&nbsp; Next the other peice of tape is place
exactly over the first tape strip.&nbsp; Rub as before.&nbsp; When the
tape is removed, the strips will attract each other.</div>
<br>
<div>I find that the students are fascinated with this activity.&nbsp;
But I don't use it to replace the electroscopes - we do that as
well.</div>
<br>
Glenn
<br>

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</font><font size=3>Physics Kahuna<br>
Kahuna Physics Institute - on the flapping edge of physics research.
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