Requested Demonstrations that we do not currently have:

Oscilloscope View of Magnet falling down tube
Vibrating Mass -- Measure velocity or position vs. time  (done)
Damped Driven Hanging mass:  method to independently measure
frequencies of driver and oscillating mass
A physical pendulum (as pg. 325 of Resnick & Halliday)
A quantitative Atwood's machine (9/29/00)
Boat with anchor to throw overboard (10/31/00) for Dr. Barnett
Hula-hoop for B.B.
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   I know I have used this before, but what I really have to remember
for next year, is that I need a single slit to compare to the double slit.
I try to cover one slit up with a piece of paper, but it doesn't really
work.  Next year.  (9/2002)
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Make explosive capacitor charge demo safer (2002)

Method to project atomic spectroscopy lines onto screen (2001)

Man hoisting himself up (2002 for MS)
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Additional demos for modern and atomic physics (JK 2003)
Resistors in series and parallel, with ammeter and voltmeters (MR 
2002-2003)
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Ampere-Maxwell law demo (Reese text) for BAB (10/2003)
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Jumping Rings, with soft ring that becomes circular
when field is applied.  (BAB, 10/2003)
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For Knight Book:
Car that moves in circle with constant speed
Motion detector and student, repair! DONE
Force table demo, for 5.1
Penny sliding off of rotating disk (7.3) DONE
happy/unhappy balls rebounding pendulum (10.6)  DONE
Ballistic Pendulum, using ping pong cannon (10.3)
Good Hooke's law demo (10.4)  --  either mass hanging from
spring, or mass on air track, want to show extension and compression.
Air table, to show that flat object rotates about center of mass (13.2)
Better center-of-mass object to throw (13.2)
Demo showing projection of rotation and oscillation of spring-mass simultaneously (14.2)
Demo producing x vs t graph for mass-spring system (14.1)
Beaker Breaker (14.7)  DONE
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Make Blackboard Vectors Larger, paint stripes every 10 CM

3D coordinate system (P.M.  8/2008) 

Some way to make tank on a moving sheet visible in 361,
or else create a better version for the demo  (PM 8/08) 

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Higher resolution RGB camera for microscope (MR 9/08)
Lecher wires (for P201)

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Model of stepped crystal surface, to show
frictional interactions between two surfaces (PM 9/2010)

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Fabricate mount to hold evacuable cell on Michelson (12/2010)
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Irregular shaped & weighted object to throw for center-of-mass