Date: Mon, 18 Nov 2002 18:32:57 -0500

Author: "Dick Heckathorn"

Subject: RE: Membrane for smoke box

Post:

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Greetings,

FYI Here is how I make one out of a cardboard box. Note I do not need
to use a rubber membrane that will rot within a year or two.

Dick

Materials:


Cardboard Box (Cube Shaped)
Plastic sheet (4 mil or heavier)
Duct Tape
Rubber Bands (heavy)
Wood Block
Cup Screw Hook
Washer



Construction Directions:

a. Remove top of box and discard.
b. Cut round hole in bottom of box.
c. Cut a square piece of plastic so that it is 10 centimeters larger
that the top of the box.
d. Place the piece of plastic over the top of the box (open end) and
duct tape it to the sides of the box making sure that the plastic is
loosely covering the end.
e. Place a 5 centimeter square piece of duct tape on both sides of the
plastic at the center of the plastic.
f. Place the wood block on the outside of the duct tape over the
plastic and screw the cup screw into the block from the inside. You will
need a washer so that the cup screw does not go through the plastic.
g. Punch two holes through the bottom of the box on opposite sides of
the circle opening halfway between the edge of the circle and the box.
h. Thread a rubber band through each hole just made in the top of the
box. Thread one end of the rubber band through the loop in the other
end. Fasten the rubber band to the cup screw. Repeat for other rubber
band.

Operation:

a. Grab hold of the block and pull the plastic away from the box. When
you let go, the plastic should snap back into the box pushing out a
pulse of air.
b. Aim the opening of the box at something that will move when hit
with air and send a pulse of air towards it. Or aim it at the hair of a
person and send a pulse. If it is working, you will see the object or
hair move.
c. Fill the box with some smoke and send a smoke ring on its way.



Extension:
a. Cut a square opening in a piece of cardboard so that the opening is
smaller than the circular opening in the bottom of the box.
b. Hold or tape the cardboard over the round opening. Send a pulse of
smoke through the square opening.
c. Note...Must we agree with mathematicians who say they cannot make a
circle out of a square???

Use:

When beginning the discussion of sound, one needs to make
sure that students realize that once a vibrating object is set in motion
with a frequency which they can hear, the sound that is created, must
travel from the source to the ears of the person that hears it.

When the plastic is snapped sending out a pulse of air, nothing is
seen emitting from the box. When students are asked if they saw
anything, they respond with a no. When I talk they likewise hear
something but do not see anything leaving my mouth. Sending out a pulse
of air directed at a student will be felt by the student when the pulse
reaches the student. Others may see the pulse arriving by the movement
of the student's hair. (Most are amazed by the relative long time it
takes the pulse to get there.) When a pulse of smoke is sent from the
box, students can see the ring of smoke and the speed at which it
travels. Thus one can relate to the students that something can travel
from one place to another without being seen. (One must understand that
with sound, particles do not travel from one place to another as the
smoke particles in the shape of a ring travel through the air.)

Additional Extension:

Set up a row of dominos along the edge of the table. Ask the
students how one can knock over the last domino at the far end with the
domino at the near end. One answer given is to throw the domino and hit
the other. In so doing, a physical object is seen going from the thrower
to the last domino. A second answer given is to knock the first checker
into the second so that each in succession knocks down the next one
until the last domino is knocked over. When this is done, ask the
students what traveled from the first domino to the last. Needless to
say we saw the dominoes fall, one at a time but that noting physical
traveled from the first to the last. When we hear a person talk, we
only hear what was said. And since we do, something must have traveled
from the person who talked to us. We will need to investigate further as
to what and how sound travels from one place to another.


"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 paul
fechtmeister
Sent: Monday, November 18, 2002 5:54 PM
To: tap-l@listproc.appstate.edu
Subject: Re: Galileo Galilei

Hey Zig,

what kind of rubber/plastic do you use for the membrane for your
vortex/smoke ring cannon thingy? I'm sure it's McMaster Carr but I'm
thinking of making mine out of a standard metal trash can......I just
want to get the rubber right.....

I sat in on your clinic at the Boise AAPT meeting..... enjoyed the
demos.....

Regards,



Paul Fechtmeister
paulfecht@hotmail.com
>From: "Zigmund J. Peacock"
>Reply-To: tap-l@listproc.appstate.edu
>To: tap-l@listproc.appstate.edu
>Subject: Re: Galileo Galilei
>Date: Mon, 18 Nov 2002 07:04:51 -0700
>
>Tappers, it is a little known fact that as Gallileo was rolling balls
down an
>incline he did not time them with water drops etc. Rather he used the
inate
>sense of time that musicians [which he was also] seem to have.
> It turns out that the musical mind can accurately recognize timing to
1/64
>of a second.
> Think of a piece of music you know well and one of the first ways you
>recognize you favourite performer is the beat associated with them.
> My bit for Monday. Zig
>
>
> > "Galilei was born in Pisa in 1564, the son of Vincenzo Galilei, well
known
> > for his studies of music, and Giulia Ammannati. He studied at Pisa,
where he
> > later held the chair in mathematics from 1589 - 1592.
>
>Zigmund J. Peacock WWW.physics.utah.edu/people/staff/peacock.html
>University of Utah/Physics peacock@physics.utah.edu
>115 SOUTH 1400 EAST #201 Tel 801 581 6602
>SALT LAKE CITY UT 84112-0830 Fax 801 581 4801
>
> "We sleep safely in our beds because rough men stand ready in
>the night to do violence to those who would do us harm"
> -- George Orwell
>
> "All that is necessary for the triumph of evil is that good
>men do nothing!"
> -- Edmund Burke


_____

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style=3D'font-size:
10.0pt;font-family:Arial;color:blue'>Greetings,
<=
/p>

style=3D'font-size:
10.0pt;font-family:Arial;color:blue'> 



style=3D'font-size:
10.0pt;font-family:Arial;color:blue'>FYI style=3D'mso-spacerun:yes'> 
Here is how I make one out of a cardboard box. Note I do not need =
to use
a rubber membrane that will rot within a year or =
two.



style=3D'font-size:
10.0pt;font-family:Arial;color:blue'> 



style=3D'font-size:
10.0pt;font-family:Arial;color:blue'>Dick



style=3D'font-size:
10.0pt;font-family:Arial;color:blue'> 



style=3D'font-size:12.0pt;
font-family:"CG Times"'>Materials:



style=3D'font-size:12.0pt;
font-family:"CG Times"'> 



=
style=3D'border-collapse:collapse;mso-table-layout-alt:fixed;mso-padding-=
alt:
0in 5.4pt 0in 5.4pt'>




0in 5.4pt'>

face=3D"CG Times"> style=3D'font-size:12.0pt;font-family:"CG Times"'> style=3D'mso-tab-count:
1'>            =
Cardboard Box (Cube Shaped) =
style=3D'mso-spacerun:yes'>       &nbs=
p;            =


face=3D"CG Times"> style=3D'font-size:12.0pt;font-family:"CG Times"'> style=3D'mso-tab-count:
1'>            =
Plastic sheet (4 mil or heavier)


face=3D"CG Times"> style=3D'font-size:12.0pt;font-family:"CG Times"'> style=3D'mso-tab-count:
1'>            =
Duct Tape


face=3D"CG Times"> style=3D'font-size:12.0pt;font-family:"CG Times"'> style=3D'mso-tab-count:
1'>            =
Rubber Bands (heavy)


face=3D"CG Times"> style=3D'font-size:12.0pt;font-family:"CG Times"'> style=3D'mso-tab-count:
1'>            =
Wood Block


face=3D"CG Times"> style=3D'font-size:12.0pt;font-family:"CG Times"'> style=3D'mso-tab-count:
1'>            =
Cup Screw Hook


face=3D"CG Times"> style=3D'font-size:12.0pt;font-family:"CG Times"'> style=3D'mso-tab-count:
1'>            =
Washer


face=3D"CG Times"> style=3D'font-size:12.0pt;font-family:"CG =
Times"'> 


face=3D"CG Times"> style=3D'font-size:12.0pt;font-family:"CG =
Times"'> 


0in 5.4pt'>

src=3D"cid:image001.wmz@01C28F30.A6DD0520"
v:src=3D"cid:image001.wmz@01C28F30.A6DD0520" v:shapes=3D"_x0000_Mail" =
width=3D0
height=3D0 class=3Dshape =
style=3D'display:none;width:0;height:0'> src=3D"cid:image002.gif@01C28F30.A6DD0520" =
v:shapes=3D"_x0000_i1026"> face=3D"CG Times">




style=3D'margin-left:27.0pt;text-indent:-27.0pt;tab-stops:
.5in'> style=3D'font-size:12.0pt;font-family:
"CG Times"'>Construction Directions:



style=3D'margin-left:27.0pt;text-indent:-27.0pt;tab-stops:
.5in'> style=3D'font-size:12.0pt;font-family:
"CG Times"'> 



style=3D'margin-left:45.0pt;text-indent:-.25in'> face=3D"CG Times"> Times"'>a. style=3D'mso-tab-count:1'>   Remove top of box and =
discard.



style=3D'margin-left:45.0pt;text-indent:-.25in'> face=3D"CG Times"> Times"'>b. style=3D'mso-tab-count:1'>   Cut round hole in bottom =
of box.



style=3D'margin-left:45.0pt;text-indent:-.25in'> face=3D"CG Times"> Times"'>c. style=3D'mso-tab-count:1'>   Cut a square piece of =
plastic so that it is
10 centimeters larger that the top of the =
box.



style=3D'margin-left:45.0pt;text-indent:-.25in'> face=3D"CG Times"> Times"'>d. style=3D'mso-tab-count:1'>   Place the piece of plastic =
over the top of
the box (open end) and duct tape it to the sides of the box making sure =
that
the plastic is loosely covering the end.



style=3D'margin-left:45.0pt;text-indent:-.25in'> face=3D"CG Times"> Times"'>e. style=3D'mso-tab-count:1'>   Place a 5 centimeter =
square piece of duct
tape on both sides of the plastic at the center of the =
plastic.



style=3D'margin-left:45.0pt;text-indent:-.25in'> face=3D"CG Times"> Times"'>f. style=3D'mso-tab-count:1'>    Place the wood block =
on the outside of the
duct tape over the plastic and screw the cup screw into the block from =
the
inside. You will need a washer so that the cup screw does not go through =
the
plastic.



style=3D'margin-left:45.0pt;text-indent:-.25in'> face=3D"CG Times"> Times"'>g. style=3D'mso-tab-count:1'>   Punch two holes through =
the bottom of the box
on opposite sides of the circle opening halfway between the edge of the =
circle
and the box.



style=3D'margin-left:45.0pt;text-indent:-.25in'> face=3D"CG Times"> Times"'>h. style=3D'mso-tab-count:1'>   Thread a rubber band =
through each hole just
made in the top of the box. Thread one end of the rubber band through =
the loop
in the other end. Fasten the rubber band to the cup screw. Repeat for =
other
rubber band.



style=3D'margin-left:45.0pt;text-indent:-.25in'> face=3D"CG Times"> Times"'> 



style=3D'margin-left:.25in;text-indent:-.25in'> face=3D"CG Times"> Times"'>Operation:



style=3D'margin-left:.25in;text-indent:-.25in'> face=3D"CG Times"> Times"'> 



style=3D'margin-left:45.0pt;text-indent:-.25in'> face=3D"CG Times"> Times"'>a. style=3D'mso-tab-count:1'>   Grab hold of the block and =
pull the plastic
away from the box. When you let go, the plastic should snap back into =
the box
pushing out a pulse of air.



style=3D'margin-left:45.0pt;text-indent:-.25in'> face=3D"CG Times"> Times"'>b. style=3D'mso-tab-count:1'>   Aim the opening of the box =
at something that
will move when hit with air and send a pulse of air towards it. Or aim =
it at
the hair of a person and send a pulse. If it is working, you will see =
the
object or hair move.



style=3D'margin-left:45.0pt;text-indent:-.25in'> face=3D"CG Times"> Times"'>c. style=3D'mso-tab-count:1'>   Fill the box with some =
smoke and send a smoke
ring on its way.



style=3D'font-size:12.0pt;font-family:"CG Times";
mso-fareast-font-family:"Times New Roman";mso-bidi-font-family:"Times =
New Roman";
mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-S=
A'> clear=3Dall =
style=3D'mso-special-character:line-break;page-break-before:always'>


style=3D'margin-left:.25in;text-indent:-.25in'> face=3D"CG Times"> Times"'> 



style=3D'margin-left:.25in;text-indent:-.25in'> face=3D"CG Times"> Times"'>Extension:



style=3D'margin-left:45.0pt;text-indent:-.25in'> face=3D"CG Times"> Times"'>a. style=3D'mso-tab-count:1'>   Cut a square opening in a =
piece of cardboard
so that the opening is smaller than the circular opening in the bottom =
of the
box.



style=3D'margin-left:45.0pt;text-indent:-.25in'> face=3D"CG Times"> Times"'>b. style=3D'mso-tab-count:1'>   Hold or tape the cardboard =
over the round
opening. Send a pulse of smoke through the square =
opening.



style=3D'margin-left:45.0pt;text-indent:-.25in'> face=3D"CG Times"> Times"'>c. style=3D'mso-tab-count:1'>   Note...Must we agree with =
mathematicians who
say they cannot make a circle out of a =
square???



style=3D'margin-left:.25in;text-indent:-.25in'> face=3D"CG Times"> Times"'> 



style=3D'margin-left:31.5pt;text-indent:-31.5pt'> face=3D"CG Times"> Times"'>Use:



style=3D'margin-left:31.5pt;text-indent:-31.5pt'> face=3D"CG Times"> Times"'> 



style=3D'margin-left:.5in;text-indent:-31.5pt'> face=3D"CG Times"> Times"'> style=3D'mso-tab-count:1'>        =
;  
When beginning the discussion of
sound, one needs to make sure that students realize that once a =
vibrating
object is set in motion with a frequency which they can hear, the sound =
that is
created, must travel from the source to the ears of the person that =
hears it.



style=3D'margin-left:.5in;text-indent:-31.5pt'> face=3D"CG Times"> Times"'> 



size=3D3
face=3D"CG Times"> Times"'> style=3D'mso-tab-count:1'>      When the =
plastic is snapped sending out a
pulse of air, nothing is seen emitting from the box. When students are =
asked if
they saw anything, they respond with a no. When I talk they likewise =
hear
something but do not see anything leaving my mouth. Sending out a pulse =
of air
directed at a student will be felt by the student when the pulse reaches =
the
student. Others may see the pulse arriving by the movement of the =
student's
hair. (Most are amazed by the relative long time it takes the pulse to =
get
there.) When a pulse of smoke is sent from the box, students can see the =
ring
of smoke and the speed at which it travels. Thus one can relate to the =
students
that something can travel from one place to another without being seen. =
(One
must understand that with sound, particles do not travel from one place =
to
another as the smoke particles in the shape of a ring travel through the =
air.)



size=3D3
face=3D"CG Times"> Times"'> 



style=3D'margin-left:.25in;text-indent:-.25in'> face=3D"CG Times"> Times"'>Additional
Extension:



style=3D'margin-left:.25in;text-indent:-.25in'> face=3D"CG Times"> Times"'> 



size=3D3
face=3D"CG Times"> Times"'> style=3D'mso-tab-count:1'>      Set up a =
row of dominos along the edge of
the table. Ask the students how one can knock over the last domino at =
the far
end with the domino at the near end. One answer given is to throw the =
domino
and hit the other. In so doing, a physical object is seen going from the
thrower to the last domino. A second answer given is to knock the first =
checker
into the second so that each in succession knocks down the next one =
until the
last domino is knocked over. When this is done, ask the students what =
traveled
from the first domino to the last. Needless to say we saw the dominoes =
fall,
one at a time but that noting physical traveled from the first to the
last.  When we hear a =
person talk, we
only hear what was said. And since we do, something must have traveled =
from the
person who talked to us. We will need to investigate further as to what =
and how
sound travels from one place to another.



style=3D'font-size:
10.0pt;font-family:Arial;color:blue'> 



style=3D'font-size:
10.0pt;font-family:Arial;color:blue'> 





style=3D'mso-bidi-font-weight:
normal'> style=3D'font-size:
10.0pt;color:blue;font-weight:bold;mso-bidi-font-weight:normal;mso-no-pro=
of:
yes'>"Science is nothing more than learning how to communicate with =
nature
in such a manner that it will talk =
back."



size=3D2
color=3Dblue face=3D"Times New Roman"> style=3D'font-size:11.0pt;color:blue;
font-weight:bold;mso-bidi-font-weight:normal;mso-no-proof:yes'> =
;



style=3D'mso-bidi-font-weight:
normal'> style=3D'font-size:
10.0pt;color:blue;font-weight:bold;mso-bidi-font-weight:normal;mso-no-pro=
of:
yes'>Helping teachers who facilitate, motivating students who =
learn.



style=3D'text-align:center'> size=3D1 color=3Dblue face=3D"Times New Roman"> style=3D'font-size:8.0pt;
color:blue;mso-no-proof:yes'>Dick =
Heckathorn
size=3D1 color=3Dblue> style=3D'font-size:8.0pt;color:blue;mso-no-proof:yes'> style=3D'mso-spacerun:yes'>  14665 Pawnee Trail style=3D'mso-spacerun:yes'>  Middleburg Hts, OH style=3D'mso-spacerun:yes'>  44130 style=3D'mso-spacerun:yes'> 
440-826-0834



size=3D1
color=3Dblue face=3D"Times New Roman"> style=3D'font-size:8.0pt;color:blue;
mso-no-proof:yes'>Physics Teacher CVCA style=3D'mso-spacerun:yes'> 
4687 Wyoga Rd  =
Cuyahoga Falls, OH
44224  330-929-0575 style=3D'mso-spacerun:yes'> 
VM =
120





style=3D'font-size:
10.0pt;font-family:Arial;color:blue'> 



face=3DTahoma> style=3D'font-size:10.0pt;font-family:Tahoma'>-----Original =
Message-----

From: =
owner-tap-l@listproc.appstate.edu
[mailto:owner-tap-l@listproc.appstate.edu] style=3D'font-weight:bold'>On
Behalf Of
paul fechtmeister

Sent: Monday, November =
18, 2002
5:54 PM

To: =
tap-l@listproc.appstate.edu

Subject: Re: Galileo =
Galilei



face=3D"Times New Roman"> style=3D'font-size:12.0pt'> 







style=3D'mso-margin-top-alt:5.0pt;margin-right:0in;margin-bottom:12.0pt;
margin-left:.5in'> style=3D'font-size:
12.0pt'>Hey Zig,



what kind of rubber/plastic  do you use for the membrane for your
vortex/smoke ring cannon thingy?  I'm sure it's McMaster Carr but =
I'm
thinking of making mine out of a standard metal trash can......I just =
want to
get the rubber right.....



I sat in on your clinic at the Boise AAPT meeting..... enjoyed the =
demos.....



Regards,





style=3D'mso-margin-top-alt:0in;margin-right:0in;margin-bottom:
12.0pt;margin-left:.5in'> style=3D'font-size:12.0pt'>
style=3D'mso-special-character:line-break'>

style=3D'mso-special-character:line-break'>





face=3D"Lucida Handwriting"> style=3D'font-size:12.0pt;font-family:"Lucida Handwriting"'>Paul
Fechtmeister





face=3DArial> style=3D'font-size:12.0pt;font-family:Arial'> href=3D"mailto:paulfecht@hotmail.com">paulfecht@hotmail.com ont>



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>>From: "Zigmund J. Peacock" =





face=3D"Times New Roman"> style=3D'font-size:12.0pt'>>Reply-To: tap-l@listproc.appstate.edu =



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>>To: tap-l@listproc.appstate.edu =



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>>Subject: Re: Galileo Galilei =



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>>Date: Mon, 18 Nov 2002 07:04:51 -0700 =



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>>



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>>Tappers, it is a little known fact that =
as
Gallileo was rolling balls down an



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>>incline he did not time them with water =
drops etc.
Rather he used the inate



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>>sense of time that musicians [which he =
was also]
seem to have.



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>> It turns out that the musical mind can =
accurately
recognize timing to 1/64



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>>of a second. =



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>> Think of a piece of music you know well =
and one
of the first ways you



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>>recognize you favourite performer is the =
beat
associated with them.



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>> My bit for Monday. Zig =



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>>



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>>



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>> > "Galilei was born in Pisa in =
1564, the
son of Vincenzo Galilei, well known



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>> > for his studies of music, and =
Giulia
Ammannati. He studied at Pisa, where he



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>> > later held the chair in mathematics =
from
1589 - 1592.



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>>



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>>Zigmund J. Peacock
WWW.physics.utah.edu/people/staff/peacock.html =



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>>University of Utah/Physics
peacock@physics.utah.edu



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>>115 SOUTH 1400 EAST #201 Tel 801 581 6602 =



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>>SALT LAKE CITY UT 84112-0830 Fax 801 581 =
4801



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>>



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>> "We sleep safely in our beds =
because rough
men stand ready in



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>>the night to do violence to those who =
would do us
harm"



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>> -- George Orwell =



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>>



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>> "All that is necessary for the =
triumph of
evil is that good



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>>men do nothing!" =



face=3D"Times New Roman"> style=3D'font-size:12.0pt'>> -- Edmund Burke =





face=3D"Times New Roman"> style=3D'font-size:12.0pt'>
style=3D'mso-special-character:line-break'>



style=3D'margin-left:.5in;text-align:center'> size=3D3 face=3D"Times New Roman">






face=3D"Times New Roman"> style=3D'font-size:12.0pt'>MSN 8 helps href=3D"http://g.msn.com/8HMFEN/2020">ELIMINATE
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