Date: Thu, 19 Feb 2004 13:42:59 -0600

Author: Andrew Yue

Subject: Re: When good demos turn bad

Post:

>
>
>Doing it in a trashcan will not help - it will likely blow up the
>trashcan. Actually, this happened at the end of the demo show in a recent
>meeting in Texas (I believe). Karl, Andrew, weren't you there?
>

Actually, I was on the other side of the stage, staying well clear of
you guys who were standing within, what was it? 8 to 10 feet of the
trash can.

For those of you that were at the demo show in San Antonio, the soda
bottle was over filled and it shredded a twenty gallon plastic trash
bin. Whoops. I did manage to launch the trash can on my side of the
stage a proper 8 feet skyward. I'm stingy with the LN2.

A great show by the way. The ending was a blast.
--

Cordially,


Andrew Yue
- yue@physics.utexas.edu -
http://www.ph.utexas.edu/~yue
Physics Lecture Demonstration Office
Office Hours 8 AM to 4 PM , Mon thru Fri
Phone (512)471-5411

"The ultimate weakness of violence is
that it is a descending spiral, begetting
the very thing it seeks to destroy. Instead
of diminishing evil, it multiplies it. " - Martin Luther King, Jr.
From paulandkathy@hotmail.com Thu Feb 19 14:48:17 2004
Date: Thu, 19 Feb 2004 19:51:40 +0000
From: Paul and Kathy Gilmour
Subject: Re: Non-computer momentum lab
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Machele,

Ive used an experiment with two balls on a ramp to demonstrate elastic
collisions and conservation of momentum. The balls are two identical steel
balls and a glass marble of approximately the same size as the steel balls.
The
bottom end of the ramp (the exit end) should be parallel with the floor,
with
height y above the floor. Ball A (mass mA) starts at the top of the ramp.
Ball
B (mass mB) rests at the very bottom of the ramp, perched so it is almost
ready
to fall off the ramp.

Consider three cases:
1. mA = mA, where balls A and B are both steel balls.
2. mA > mB, where balls A is a steel ball, and ball B is a marble.
3. mA < mB, where balls A is a marble, and ball B is a steel ball.

First allow ball A to roll down the track and hit the floor (mark the spot
with
carbon paper), and calculate its velocity using the formula vA =
x*sqrt(g/(2*y))
where x is the horizontal distance from the end of the ramp to the impact
point.
Then start ball A at the same point and allow it to hit ball B. Calculate
the
velocities of both ball A and ball B from their points of impact on the
floor
and compare these with the theoretical predictions for vA and vB.

The tricky thing with ball-on-a-ramp experiments is taking the rotational
kinetic energy into account. By perching ball B at the bottom tip of the
ramp
it doesnt pick up any rotational energy, and the measured vB is close to
the
calculated vB. The measured vA is larger than the theoretical vA, which
can
be attributed to some of As rotational kinetic energy adding to its
translational kinetic energy. (I.e. after the collision A is rotating
faster
than it is rolling, and some of that rotational kinetic energy is converted
to
translational kinetic energy via friction with the last short piece of the
ramp
before A launches into the air.)

Note that for case 3, ball A bounces backwards so that its post-collision
velocity, vA, is not measurable by its impact point on the floor.

Paul Gilmour
Home School Physics Lab Instructor
Bloomfield, NJ

-----Original Message-----
From: owner-tap-l@listproc.appstate.edu
[mailto:owner-tap-l@listproc.appstate.edu]On Behalf Of Machele Cable
Sent: Wednesday, February 18, 2004 12:05 PM
To: Tap-L Tap-L
Subject: Non-computer momentum lab


Anyone have a conservation of momentum lab that doesnt use comuters
theyd like to share with me? My only idea so far was the ballistics
pendulum.
Chele

_________________________________________________________________
Get fast, reliable access with MSN 9 Dial-up. Click here for Special Offer!
http://click.atdmt.com/AVE/go/onm00200361ave/direct/01/
From reberg@physics.umd.edu Thu Feb 19 14:51:08 2004
X-Authentication-Warning: student1.physics.umd.edu: reberg owned process doing -bs
Date: Thu, 19 Feb 2004 14:52:51 -0500 (EST)
From: Richard Berg
To: tap-l@listproc.appstate.edu
Subject: Re: When good demos turn bad
In-Reply-To: <3095116.1077218911439.JavaMail.gpuskar@mix.wvu.edu>
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I remember standing about 20 feet from it when it exploded and it scared
the *$!!)(??&&$$###!!!! out of me.

Dick Berg

On Thu, 19 Feb 2004, Gregory P Puskar wrote:

> I recall a piece of the trash can flying by Chele's head where she sat
> off stage.
>
> Greg
>
>
> Richard Berg wrote:
>
>
> >In response to the quotes below:
> >
> >How do you re-use a bottle - how would you release the pressure without
> >the likelihood of getting blown up.
> >
> >I agree with Paul that you should not do this within 100 yards of
> people.
> >
> >Doing it in a trashcan will not help - it will likely blow up the
> >trashcan. Actually, this happened at the end of the demo show in a
> recent
> >meeting in Texas (I believe). Karl, Andrew, weren't you there?
> >
> >Dick Berg
> >
> >
> >I would think that with a trash can over the whole setup it would be
> pretty
> >safe. I bet it is very noisy though. David, how long does it take to
> go
> >off once you cap it? ...Doug J.
> >
> >PS.. With the ethanol 2-liter rocket, has anyone had a mishap with a new
> >bottle? I would imagine that reusing the same bottle is the major
> >problem.
> >
> >***********************************************************************
> >Dr. Richard E. Berg, Professor of the Practice
> >Director, Physics Lecture-Demonstration Facility
> >U.S. mail address:
> >Department of Physics
> >University of Maryland
> >College Park, MD 20742-4111
> >Phone: (301) 405-5994
> >FAX: (301) 314-9525
> >e-mail reberg@physics.umd.edu
> >www.physics.umd.edu/lecdem
> >***********************************************************************
> >
> >
>
> ----------------------------------------
> Gregory Puskar
> Lab Manager/WVU Physics Dept.
> Morgantown, WV 26506
> Phone: 304-293-3422 x 1455
> Fax: 304-293-5732
>
>

***********************************************************************
Dr. Richard E. Berg, Professor of the Practice
Director, Physics Lecture-Demonstration Facility
U.S. mail address:
Department of Physics
University of Maryland
College Park, MD 20742-4111
Phone: (301) 405-5994
FAX: (301) 314-9525
e-mail reberg@physics.umd.edu
www.physics.umd.edu/lecdem
***********************************************************************
From cablem@wfu.edu Thu Feb 19 15:07:24 2004
Message-ID: <40351851.2020703@wfu.edu>
Date: Thu, 19 Feb 2004 15:10:57 -0500
From: Machele Cable
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To: tap-l@listproc.appstate.edu
Subject: Re: When good demos turn bad
References: <003701c3f6bd$f7847210$e4814284@simchalab> <4034EB4D.1090306@pitt.edu>
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These demos are where video comes in handy. Yes, I know its easy to fake
it with video, but if you do it all in one take from filling the bottle
to the ultimate explosion, they should believe it readily enough. On a
big screen, its still pretty impressive.

Chele


Andrew Yue wrote:

> David, a half-liter soda bottle filled to about 1/4 to 1/3 full will
> blow a good size plastic trash can upward to an altitude of 6 to 8
> feet. In my experience, the trash inverted plastic trash can does the
> trick. It muffles the sound a bit and the bottle fragments don't go
> far. Even still, I don't like anyone sitting within 12 feet of the
> thing and often ask a couple of folks to move back a couple of rows.
> We use a disposable aluminum pie pan for a water tray.
>
> PS - A 2 liter bottle filled with a pint or so of LN2 is overdoing it,
> but to each his own.
>
>> Hi all,
>> I used to do a demonstration where I'd put a tightly capped soda
>> bottle, with a pint or so of liquid nitrogen in it, under a plastic
>> garbage can and have the can projected tens of meters into the air
>> when the bottle exploded. Great demo, kids love it. One day I noticed
>> the very frozen neck of the bottle, cap still on, hurtle past the
>> head of a student and hit the back wall of the room. I didn't want to
>> drop the demo, but obviously had to make it safer. I fastened a
>> stainless steel bowl, basically a hemisphere about 8 inches in
>> diameter, to a 2x6x6 inch piece of wood, which in turn was fastened
>> to a 12x12x3/4 inch piece piece of plywood. Before fastening the bowl
>> to the wood I cut a 1 inch diameter hole in the middle of the bottom
>> of the bowl and in the center of the piece of wood so that the holes
>> lined up when the two were fastened together. I used 6 wood screws,
>> almost as long as the thickness of the wood and plywood combined, 3
>> from each side to fasten all this together. Then I glued a 12x12
>> inch piece of carpet to the plywood. This arrangement allows me to
>> stand the soda bottle up on its neck, with the capped neck down in
>> the holes. When the bottle explodes the neck and cap stay in the hole
>> in the wood and the bowl directs the rest of the bottle pieces
>> upward. Seemed to work great, of course now I have to wonder if I can
>> legally do demo's with this "destructive devise" without a license.
>> I'll post a picture of a version (using circles of wood rather than
>> squares, but you'll get the idea) at
>> http://www.pitt.edu/~dwilley/sodabottlestand.html
>> cheers,
>> David
>
>
>

--
~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~
Machele Cable Lab Manager Physics WFU
Phone: (336) 758-5532 Fax: (336) 758-6142
~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~
Friends are the Bacon Bits in the salad bowl of life.
~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~
There's a thin woman inside of me trying to get out,
but I can usually shut her up with some chocolate!

From paulandkathy@hotmail.com Thu Feb 19 15:07:40 2004
Date: Thu, 19 Feb 2004 20:11:14 +0000
From: Paul and Kathy Gilmour
Subject: Re: Non-computer momentum lab
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Machele,

Ive used an experiment with two balls on a ramp to demonstrate elastic
collisions and conservation of momentum. The balls are two identical steel
balls and a glass marble of approximately the same size as the steel balls.
The
bottom end of the ramp (the exit end) should be parallel with the floor,
with
height y above the floor. Ball A (mass mA) starts at the top of the ramp.
Ball
B (mass mB) rests at the very bottom of the ramp, perched so it is almost
ready
to fall off the ramp.

Consider three cases:
1. mA = mA, where balls A and B are both steel balls.
2. mA > mB, where balls A is a steel ball, and ball B is a marble.
3. mA < mB, where balls A is a marble, and ball B is a steel ball.

First allow ball A to roll down the track and hit the floor (mark the spot
with
carbon paper), and calculate its velocity using the formula vA =
x*sqrt(g/(2*y))
where x is the horizontal distance from the end of the ramp to the impact
point.
Then start ball A at the same point and allow it to hit ball B. Calculate
the
velocities of both ball A and ball B from their points of impact on the
floor
and compare these with the theoretical predictions for vA and vB.

The tricky thing with ball-on-a-ramp experiments is taking the rotational
kinetic energy into account. By perching ball B at the bottom tip of the
ramp
it doesnt pick up any rotational energy, and the measured vB is close to
the
calculated vB. The measured vA is larger than the theoretical vA, which
can
be attributed to some of As rotational kinetic energy adding to its
translational kinetic energy. (I.e. after the collision A is rotating
faster
than it is rolling, and some of that rotational kinetic energy is converted
to
translational kinetic energy via friction with the last short piece of the
ramp
before A launches into the air.)

Note that for case 3, ball A bounces backwards so that its post-collision
velocity, vA, is not measurable by its impact point on the floor.

Paul Gilmour
Home School Physics Lab Instructor
Bloomfield, NJ

-----Original Message-----
From: owner-tap-l@listproc.appstate.edu
[mailto:owner-tap-l@listproc.appstate.edu]On Behalf Of Machele Cable
Sent: Wednesday, February 18, 2004 12:05 PM
To: Tap-L Tap-L
Subject: Non-computer momentum lab


Anyone have a conservation of momentum lab that doesnt use comuters
theyd like to share with me? My only idea so far was the ballistics
pendulum.
Chele

_________________________________________________________________
Click, drag and drop. My MSN is the simple way to design your homepage.
http://click.atdmt.com/AVE/go/onm00200364ave/direct/01/
From cablem@wfu.edu Thu Feb 19 15:08:40 2004
Message-ID: <403518AF.9060306@wfu.edu>
Date: Thu, 19 Feb 2004 15:12:31 -0500
From: Machele Cable
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To: tap-l@listproc.appstate.edu
Subject: Re: When good demos turn bad
References: <3095116.1077218911439.JavaMail.gpuskar@mix.wvu.edu>
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If it did, I was oblivious....or don't remember (is it really memory
that goes first or just that we forget what went before?). That must've
been when I was Darth Vader.

Chele

Gregory P Puskar wrote:

>I recall a piece of the trash can flying by Chele's head where she sat
>off stage.
>
>Greg
>
>
>Richard Berg wrote:
>
>
>
>
>>In response to the quotes below:
>>
>>How do you re-use a bottle - how would you release the pressure without
>>the likelihood of getting blown up.
>>
>>I agree with Paul that you should not do this within 100 yards of
>>
>>
>people.
>
>
>>Doing it in a trashcan will not help - it will likely blow up the
>>trashcan. Actually, this happened at the end of the demo show in a
>>
>>
>recent
>
>
>>meeting in Texas (I believe). Karl, Andrew, weren't you there?
>>
>>Dick Berg
>>
>>
>>I would think that with a trash can over the whole setup it would be
>>
>>
>pretty
>
>
>>safe. I bet it is very noisy though. David, how long does it take to
>>
>>
>go
>
>
>>off once you cap it? ...Doug J.
>>
>>PS.. With the ethanol 2-liter rocket, has anyone had a mishap with a new
>>bottle? I would imagine that reusing the same bottle is the major
>>problem.
>>
>>***********************************************************************
>>Dr. Richard E. Berg, Professor of the Practice
>>Director, Physics Lecture-Demonstration Facility
>>U.S. mail address:
>>Department of Physics
>>University of Maryland
>>College Park, MD 20742-4111
>>Phone: (301) 405-5994
>>FAX: (301) 314-9525
>>e-mail reberg@physics.umd.edu
>>www.physics.umd.edu/lecdem
>>***********************************************************************
>>
>>
>>
>>
>
>----------------------------------------
>Gregory Puskar
>Lab Manager/WVU Physics Dept.
>Morgantown, WV 26506
>Phone: 304-293-3422 x 1455
>Fax: 304-293-5732
>
>
>
>
>

--
~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~
Machele Cable Lab Manager Physics WFU
Phone: (336) 758-5532 Fax: (336) 758-6142
~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~
Friends are the Bacon Bits in the salad bowl of life.
~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~
There's a thin woman inside of me trying to get out,
but I can usually shut her up with some chocolate!

From cablem@wfu.edu Thu Feb 19 15:11:24 2004
Message-ID: <40351946.3040808@wfu.edu>
Date: Thu, 19 Feb 2004 15:15:02 -0500
From: Machele Cable
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Subject: Re: Non-computer momentum lab
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Thanks! I tried this actually last week and couldn't get satisfactory
results from the equipment on hand. I've pretty much decided to do the
Ballistics Pendulum. I'm still pondering why they have several of those
expensive things and not simple basic things. Community college budget,
I assume.

Chele


Paul and Kathy Gilmour wrote:

> Machele,
>
> Ive used an experiment with two balls on a ramp to demonstrate elastic
> collisions and conservation of momentum. The balls are two identical
> steel
> balls and a glass marble of approximately the same size as the steel
> balls. The
> bottom end of the ramp (the exit end) should be parallel with the
> floor, with
> height y above the floor. Ball A (mass mA) starts at the top of the
> ramp. Ball
> B (mass mB) rests at the very bottom of the ramp, perched so it is
> almost ready
> to fall off the ramp.
>
> Consider three cases:
> 1. mA = mA, where balls A and B are both steel balls.
> 2. mA > mB, where balls A is a steel ball, and ball B is a marble.
> 3. mA < mB, where balls A is a marble, and ball B is a steel ball.
>
> First allow ball A to roll down the track and hit the floor (mark the
> spot with
> carbon paper), and calculate its velocity using the formula vA =
> x*sqrt(g/(2*y))
> where x is the horizontal distance from the end of the ramp to the
> impact point.
> Then start ball A at the same point and allow it to hit ball B.
> Calculate the
> velocities of both ball A and ball B from their points of impact on
> the floor
> and compare these with the theoretical predictions for vA and vB.
>
> The tricky thing with ball-on-a-ramp experiments is taking the rotational
> kinetic energy into account. By perching ball B at the bottom tip of
> the ramp
> it doesnt pick up any rotational energy, and the measured vB is
> close to the
> calculated vB. The measured vA is larger than the theoretical vA,
> which can
> be attributed to some of As rotational kinetic energy adding to its
> translational kinetic energy. (I.e. after the collision A is rotating
> faster
> than it is rolling, and some of that rotational kinetic energy is
> converted to
> translational kinetic energy via friction with the last short piece of
> the ramp
> before A launches into the air.)
>
> Note that for case 3, ball A bounces backwards so that its post-collision
> velocity, vA, is not measurable by its impact point on the floor.
>
> Paul Gilmour
> Home School Physics Lab Instructor
> Bloomfield, NJ
>
> -----Original Message-----
> From: owner-tap-l@listproc.appstate.edu
> [mailto:owner-tap-l@listproc.appstate.edu]On Behalf Of Machele Cable
> Sent: Wednesday, February 18, 2004 12:05 PM
> To: Tap-L Tap-L
> Subject: Non-computer momentum lab
>
>
> Anyone have a conservation of momentum lab that doesnt use comuters
> theyd like to share with me? My only idea so far was the ballistics
> pendulum.
> Chele
>
> _________________________________________________________________
> Get fast, reliable access with MSN 9 Dial-up. Click here for Special
> Offer! http://click.atdmt.com/AVE/go/onm00200361ave/direct/01/
>
>
>

--
~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~
Machele Cable Lab Manager Physics WFU
Phone: (336) 758-5532 Fax: (336) 758-6142
~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~
Friends are the Bacon Bits in the salad bowl of life.
~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~
There's a thin woman inside of me trying to get out,
but I can usually shut her up with some chocolate!

From gnper090@wviz.org Thu Feb 19 20:06:44 2004
From: "Dick Heckathorn"
To:
Subject: RE: When good demos turn bad
Date: Thu, 19 Feb 2004 20:14:04 -0500
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"Scared the *$!!)(??&&$$###!!!! out of me" Dick Berg

How did you get it all back in?

Dick

"Science is nothing more than learning how to communicate with nature in
such a manner that it will talk back."

Helping teachers who facilitate, motivating students who learn.
Dick Heckathorn 14665 Pawnee Trail Middleburg Hts, OH 44130
440-826-0834
Physics Teacher CVCA 4687 Wyoga Rd Cuyahoga Falls, OH 44224
330-929-0575 VM 120




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From gnper090@wviz.org Thu Feb 19 21:28:59 2004
From: "Dick Heckathorn"
To:
Subject: RE: Lab about multimeter
Date: Thu, 19 Feb 2004 21:36:19 -0500
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Greetings Chele

Go to:

http://www.cvcaroyals.org/%7Erheckathorn/HONORS/web%20pages/honors17.htm


You will find two power points.

One titled: Operating a Digital Multimeter

I was able to purchase cheap multimeters from a local discount store.
Harbor Freight also has them or one like it. I paid $3.99 for them.
During the first year of use by three classes, all continues to work
well. Only one fuse was blown.

A second titled: Ohms Law Resistance in Series and Parallel
The first part is what I use to lead a class through hooking up a simple
circuit, measuring current and voltage, then investigating how resistors
in series and parallel combine (resultant resistance). There is much
more.

It is not a written lab as you were looking for. Could be easily
transmitted into one.

I would enjoy knowing what you think of them.

Enjoy. Dick


"Science is nothing more than learning how to communicate with nature in
such a manner that it will talk back."

Helping teachers who facilitate, motivating students who learn.
Dick Heckathorn 14665 Pawnee Trail Middleburg Hts, OH 44130
440-826-0834
Physics Teacher CVCA 4687 Wyoga Rd Cuyahoga Falls, OH 44224
330-929-0575 VM 120


-----Original Message-----
From: owner-tap-l@listproc.appstate.edu
[mailto:owner-tap-l@listproc.appstate.edu] On Behalf Of Machele Cable
Sent: Wednesday, February 18, 2004 2:01 PM
To: Tap-L Tap-L
Subject: Lab about multimeters

Does anyone have a lab written up about multimeters? We're finding that
our students have a real hard time with the Ohm's law lab because its
too much info (Ohm's law combined with an intro to meters) so we want to

do a lab just on the meters. If someone would share, that'd be great.

Chele

--
~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ -
~ - ~ - ~ - ~
Machele Cable Lab Manager Physics WFU
Phone: (336) 758-5532 Fax: (336) 758-6142
~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ -
~ - ~ - ~ - ~
Friends are the Bacon Bits in the salad bowl of life.
~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ - ~ -
~ - ~ - ~ - ~
There's a thin woman inside of me trying to get out,
but I can usually shut her up with some chocolate!

From dwilley+@pitt.edu Thu Feb 19 23:30:20 2004
Date: Thu, 19 Feb 2004 23:28:01 -0500
From: David Willey
Subject: Re: When good demos turn bad
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previously I wrote

>>>I used to do a demonstration where I'd put a tightly capped soda
>>>bottle, with a pint or so of liquid nitrogen in it, under a plastic
>>>garbage can
>>>

by "garbage can" I mean a 32 gallon, Rubbermaid Brute plastic garbage can, they're the strongest I can find.


From dwilley+@pitt.edu Thu Feb 19 23:30:32 2004
Date: Thu, 19 Feb 2004 23:31:34 -0500
From: David Willey
Subject: Re: When good demos turn bad
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Did that one time and had a couple of kids sneek over and peek down into
the barrel, just as the bottle exploded. Drenched and shocked, but very
fortunately uninjured. I think it was me that learnt the biggest lesson
that day.....
David

Patricia Sievert wrote:

> Hi everyone,
> I don't do this with the empty trash can, but with the 20 oz bottle
> submerged in a commercial grade garbage can filled with water
> (outside, well away from the audience). I made a weight for the
> bottle from 2 large party balloons, one inside the other, filled with
> lead shot, and tied shut. The mouth of the balloon fits snugly over
> the bottle's cap, holding that portion of the bottle down at the
> bottom of the water filled can when it blows. It is quick and easy to
> put the cap on the bottle even with the "lead balloon" attached. I
> don't do this one very often, as I'll only do it outside.
> Pati


From billb@eskimo.com Fri Feb 20 02:52:58 2004
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Date: Thu, 19 Feb 2004 23:56:49 -0800 (PST)
From: William Beaty
To: tap-l@listproc.appstate.edu
Subject: Veepers!
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Talking Bill Beaty head
http://amasci.com/creepy.html

Article:

http://www.altrc.org/displayit.asp?id=1648
http://www.rhetoricalsystems.com/tts-en/company/press/020513_ft.htm



Should we be prepared for hoards of creepy "virtual educators?"


Or, just do it like this:

http://amasci.com/graphics/howfast3.gif


(((((((((((((((((( ( ( ( ( (O) ) ) ) ) )))))))))))))))))))
William J. Beaty SCIENCE HOBBYIST website
billb@eskimo.com http://amasci.com
EE/programmer/sci-exhibits amateur science, hobby projects, sci fair
Seattle, WA 206-789-0775 unusual phenomena, tesla coils, weird sci
From trappe@physics.utexas.edu Fri Feb 20 07:01:15 2004
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