Combined display of all available logs of UO Physics Demonstration Catalog. You can narrow down the view by selecting a log type, the username (case-sensitive), or the affected page (also case-sensitive).

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• 10:37, 13 April 2022 Physdemo talk contribs created page Interference--Stereo Speakers (Created page with "{{NewDemo|subject=OWS|topic=Waves|file1=Interference-Stereo Speaker.gif}} A common signal is sent to two speakers. One speaker is hooked through switch that changes the phase of one speaker by 180 degrees. At low frequencies, 50hz, students are asked in which position does the signal sound louder. Alternative: When two speakers wired out of phase are placed facing each other you will get substantial cancellation of sounds where the wavelengths are greater than the 3-4c...")
• 10:19, 13 April 2022 Physdemo talk contribs created page Film Loops--Waves (Created page with "{{NewDemo|subject=OWS|topic=Waves|file1=}} Barrier Penetration by Waves 48 Bragg Reflection of Waves 49 Circular Wave Reflection from Various Barriers 45 Diffraction and Scattering around Obstacles 57 Diffraction Double Slit 43,43a Diffraction Single Slit 100 Doppler Effect...")
• 10:19, 13 April 2022 Physdemo talk contribs created page Standing Wave (Created page with "{{NewDemo|subject=OWS|topic=Waves|file1=Standing_Wave.gif}} Use the linear motor to drive standing waves on a rope attached to a post standing ~10 yards away. Find the first harmonic and then show that its integer multiples are also standing waves. Some estimate frequencies are marked on the motor. '''Location:''' * Linear motor: Sh. C4 * Stand for the motor: Sh. I0 * Rope: Dr. 45 * Post/Stand for Post: In front of Sh. O")
• 10:11, 13 April 2022 Physdemo talk contribs created page Torsion Wave Apparatus (Created page with "{{NewDemo|subject=OWS|topic=Waves|file1=Torsion Wave.gif}} A set of horizontal rods attached to a common wire down their middle. An excellent wave maker. A mechanical driver with variable frequency and amplitude, a dampening device, and a node maker (for changing boundary conditions) are available. Several different varieties -- two with different k values and one with a changing k value. Optional UV strip to make dots on the end of each rod glow. '''Location: ''' * Sh...")
• 10:10, 13 April 2022 Physdemo talk contribs created page Sine Wave--Copper Tubing (Created page with "{{NewDemo|subject=OWS|topic=Waves|file1=Sine Wave--Copper Tubing.gif}} Two copper tubes bent into sine waves. '''Location: ''' * Shelf D-4") Tag: Visual edit: Switched
• 10:05, 13 April 2022 Physdemo talk contribs created page Wave Machine--1905 (Created page with "{{NewDemo|subject=OWS|topic=Waves|file1=Torsion_Wave_Machine_1905.gif}} A device designed to show the differences between how water, sound, and ether (did you notice when this was made) waves propagate. A crank in back causes each set of waves to move together, but boards may be used to hide the motion of up to two of the types. '''Location: ''' * Shelf O-0") Tag: Visual edit: Switched
• 10:04, 13 April 2022 Physdemo talk contribs created page Wave Fronts on a String (Created page with "{{NewDemo|subject=OWS|topic=Waves|file1=Wave_Fronts_on_a_String.gif}} Demo description. '''Location: ''' * D-4?") Tag: Visual edit: Switched
• 09:38, 13 April 2022 Physdemo talk contribs created page Moog Synthesizer (Created page with "{{NewDemo|subject=OWS|topic=Waves|file1=moog1.jpg|file2=moog3.jpg}} This is a pretty fun demo showing the cool sounds a Moog synthesizer makes on an oscilloscope. To set up, you want two outputs from the L output jack of the Moog, one going to an amplifier and one going to the oscilloscope: align=center Make sure the Moog is set to patch "G 66", which is named "Cohen Wave Shapes." To scroll through patches on the synthesizer, use the "Enter" button...")
• 12:34, 11 April 2022 Physdemo talk contribs created page Fourier Synthesizer (Created page with "{{NewDemo|subject=OWS|topic=Waves|file1=}}")
• 12:33, 11 April 2022 Physdemo talk contribs created page Bungee Ring Oscillator (Created page with "{{NewDemo|subject=OWS|topic=Oscillations|file1=bungeering.jpg}} Circular loop fixed by 16 rubber bands is driven by a mechanical oscillator. Pair with a strobe light to enhance visual effect. Pictured is the resonance with 7 peaks, up to 13 peaks is reasonably visible. Note: Time-consuming to set up. Please give ample notice before use. '''Location: ''' * Base Board: BC-0 * Bungee Loop: D-3 right * Mechanical Driver: D-3 (accessories also on D-3) * Strobe: C-3 * Signal...")
• 12:28, 11 April 2022 Physdemo talk contribs created page Ferro Fluid Movies (Created page with "{{NewDemo|subject=OWS|topic=Oscillations|file1=}} There is a small amount of Ferro Fluid in a pyrex beaker. The beaker is atop a solenoid, through which we a sending an ac signal using a signal generator set for low frequencies. We found that signals above about 20 hertz were just too fast for the fluid to respond to, and these movies don't show anything beyond a few hertz. frame")
• 12:24, 11 April 2022 Physdemo talk contribs created page Chladni Plates (Created page with "{{NewDemo|subject=OWS|topic=Oscillations|file1=Chladni_Plates.gif}} Demo description. '''Location: ''' * Shelf C-4 & Drawer 29")
• 12:22, 11 April 2022 Physdemo talk contribs created page Tacoma Narrows Bridge Video (Created page with "{{NewDemo|subject=OWS|topic=Oscillations|file1=}} A video depicting the collapse of the Tacoma Narrows Bridge. Location: With VideoDiscs OR <youtube>https://www.youtube.com/watch?v=3mclp9QmCGs</youtube>")
• 12:20, 11 April 2022 Physdemo talk contribs created page Inertia Balance (Created page with "{{NewDemo|subject=OWS|topic=Oscillations|file1=Inertia_Balance.gif}} No description. Location: Wall next to Shelf O")
• 12:14, 11 April 2022 Physdemo talk contribs created page Sympathetic Pendula (Created page with "{{NewDemo|subject=OWS|topic=Oscillations|file1=Sympathetic_Pendula.gif}} A way to show the effects of resonance frequencies. When the longer pendulum is set oscillating, the others move little. When a shorter one is set in motion, all of the small ones move with large amplitudes but the long one moves little. '''Location: ''' * Shelf H-1")
• 12:14, 11 April 2022 Physdemo talk contribs created page Lissajous Figures (Created page with "{{NewDemo|subject=OWS|topic=Oscillations|file1=}} Light is shown through two oscillating plates. One has a vertical slit and oscillates horizontally. The other has a horizontal slit and oscillated vertically. Either slit can be set oscillating alone to show the two components of the final form when bo th are set in motion. The period can be adjusted on the one with the horizontal slit -- a stationary figure results with an integral ratio of periods. Shine light through...")
• 12:11, 11 April 2022 Physdemo talk contribs created page File:Glassbreak.webm
• 12:11, 11 April 2022 Physdemo talk contribs uploaded File:Glassbreak.webm
• 11:49, 11 April 2022 Physdemo talk contribs created page Wine Glass Breaks (Created page with "{{NewDemo|subject=OWS|topic=Oscillations|file1=glssbrkw.jpg}} Great demonstration for resonance. A wine glass is setup in an enclosure. The resonant frequency of the glass is first found by placing a Ping-Pong ball in the glass and adjusting the signal generator to find the frequency that causes the most energetic vibration of the Ping-Pong ball. The glass is then set in front of the horn driver. A loud pulse of sound will cause the glass to break. '''Location:''' * E...")
• 11:48, 11 April 2022 Physdemo talk contribs created page Driven Harmonic Oscillator 3 (Created page with "{{NewDemo|subject=OWS|topic=Oscillations|file1=Driven_Harmonic_Oscillator3.gif}} A motor drives a mass on a spring. '''Location: ''' * Motor: Shelf C-4 * Stand: Shelf I-0 * Masses: Shelf A-4 * Springs: Drawer 6")
• 11:47, 11 April 2022 Physdemo talk contribs created page Driven Harmonic Oscillator 2 (Created page with "{{NewDemo|subject=OWS|topic=Oscillations|file1=Driven_Harmonic_Oscillator2.gif}} An old turntable is used to drive this mass on a spring. Water in the tube is used to dampen the oscillations to allow rapid response to the changing of the driving frequency. '''Location:''' * Shelf D-0")
• 11:46, 11 April 2022 Physdemo talk contribs created page Driven Harmonic Oscillator (Created page with "{{NewDemo|subject=OWS|topic=Oscillations|file1=Driven_Harmonic_Oscillator.gif}} The lower horizontal bar swings as a pendulum from the upper rod. All of the styro ball pendulums are driven by this motion but only the one with the same length develops a large amplitude. '''Location:''' * Shelf C-1")
• 11:45, 11 April 2022 Physdemo talk contribs created page Damped Harmonic Oscillator (Created page with "{{NewDemo|subject=OWS|topic=Oscillations|file1=Damped_Harmonic_Oscillator.gif}} A mass on a spring with a large piece of cardboard. '''Location:''' * Shelf A-3")
• 11:42, 11 April 2022 Physdemo talk contribs created page Pendulum Period:length vs. mass (Created page with "{{NewDemo|subject=OWS|topic=Oscillations|file1=Pendulum_L_vs_M.gif}} Two of these pendulum have the same mass but are different length. Two are the same length but have different masses. Note to Staff: Do not separate or disassemble these as it takes a bit of effort to get the lengths to match. '''Location: ''' * Shelf A-3")
• 11:41, 11 April 2022 Physdemo talk contribs created page Circular vs. Linear Harmonic Motion 2 (Created page with "{{NewDemo|subject=OWS|topic=Oscillations|file1=Circ_vs_lin_harm_mot--2.gif}} An overhead demo. Location: Shelf D-4")
• 11:39, 11 April 2022 Physdemo talk contribs created page Circular vs. Linear Harmonic Motion (Created page with "{{NewDemo|subject=OWS|topic=Oscillations|file1=Circ_vs_lin_harm_mot.gif}} Shadow projection is used to compare the motion of a mass on a spring with the motion of a point on a rotating disk. Note to Staff: Allow a lot of time to match the period of the motor to that of the spring. This is sensitive to very small deviations. Also, use the motor for the rubber rope driver. It must be detached from the base and the disk attached. '''Location:''' * Motor: Shelf C-4")
• 11:38, 11 April 2022 Physdemo talk contribs created page Torsion Pendulum (Created page with "{{NewDemo|subject=OWS|topic=Oscillations|file1=Torsion_Pendulum.gif}} Note: take care not to bend the rod when moving this. '''Location: ''' * Next to Shelf E")
• 11:38, 11 April 2022 Physdemo talk contribs created page SHM--Pendulum and Spring (Created page with "{{NewDemo|subject=OWS|topic=Oscillations|file1=SHM_pendulum_and_spring.gif}} A simple pendulum and a mass on a spring. '''Location: ''' * Pendulum Bobs: Drawer 2 * Springs: Drawer 7 * Masses: Shelf A-4")
• 11:34, 11 April 2022 Physdemo talk contribs created page Coupled Harmonic Oscillators (Created page with "{{NewDemo|subject=OWS|topic=Oscillations|file1=Coupled_Harmonic_Oscillator.gif}} A permanent apparatus consisting of three types of coupled oscillators. '''Location:''' * Shelf H-1")
• 15:09, 7 April 2022 Physdemo talk contribs created page Tantalus Cup -- siphon vase (Created page with "{{NewDemo|subject=Fluid Mechanics|topic=Hydraulics|file1=}} An intermittent siphon. The siphoning will begin when the water level has reached the top of the tube and continue for as long as the water remains above the upper opening of the curved tube. '''Location:''' * Shelf T-1")
• 15:09, 7 April 2022 Physdemo talk contribs created page Hero's Fountain (Created page with "{{NewDemo|subject=Fluid Mechanics|topic=Hydraulics|file1=}} A fountain that appears to defy the law that water can only rise to its highest level. The fountain appears because of the air space in the lower bulb.")
• 15:07, 7 April 2022 Physdemo talk contribs created page Hydraulic Ram (Created page with "{{NewDemo|subject=Fluid Mechanics|topic=Hydraulics|file1=Hydraulic_Ram.gif}} A device which uses the inertia of flowing water to pump part of the flow to a point higher than its source. Fill the reservoir and the ram will do the rest. The valve at the bottom may need a tap to get it going. '''Location:''' * Shelf T-2")
• 15:07, 7 April 2022 Physdemo talk contribs created page Adhesion Disk (Created page with "{{NewDemo|subject=Fluid Mechanics|topic=Surface Tension|file1=Adhesion_Disk.gif}} Pull up on the string when these two glass plates are dry and they only the upper plate will be lifted. Add a drop of water between them and both will rise.< '''Location:''' * Drawer 19")
• 15:06, 7 April 2022 Physdemo talk contribs created page Surface Tension Apparatus (Created page with "{{NewDemo|subject=Fluid Mechanics|topic=Surface Tension|file1=Surface_Tension_App.gif}} The air within the plastic bubble will keep this afloat. But if submerged surface tension around the wire ring will keep it under. '''Location:''' * Drawer 19")
• 14:17, 7 April 2022 Physdemo talk contribs created page Atomizer (Created page with "{{NewDemo|subject=Fluid Mechanics|topic=Fluid Dynamics|file1=Atomizer.gif}} Pressurized air moves through a reducer that has been placed within a T-connector. The high velocity of the air causes a pressure reduction within the T that results in water being drawn up from the beaker. The water is then drawn into the airstream resulting in an effect exploited in air brushes. ''' Location: ''' * Drawer ?")
• 14:16, 7 April 2022 Physdemo talk contribs created page Vortex Bottles (Created page with "{{NewDemo|subject=Fluid Mechanics|topic=Fluid Dynamics|file1=vortexbottle.gif}} Two clear plastic bottles are connected together. As the water drains from the top bottle to the bottom, a vortex is formed. '''Location:''' * Drawer ?")
• 14:15, 7 April 2022 Physdemo talk contribs created page Viscosity Comparator (Created page with "{{NewDemo|subject=Fluid Mechanics|topic=Fluid Dynamics|file1=Viscosity.gif}} Large Pyrex test tubes are filled with fluids (Glycerin & water solutions) of different viscosities. A ball falling in the test tube demonstrates the relationship between terminal velocity and viscosity. '''Location: ''' * Shelf T-2 *")
• 14:14, 7 April 2022 Physdemo talk contribs created page Air Foil (Created page with "{{NewDemo|subject=Fluid Mechanics|topic=Fluid Dynamics|file1=Air_Foil.GIF}} A large styrofoam plane actually glides. The wings can be removed and the shape can be easily seen by a large lecture class. Smaller wing section is also available. '''Location: ''' * Large styrofoam glider: On top of shelf N * Small airplane wing: On top of shelf N *")
• 14:00, 7 April 2022 Physdemo talk contribs created page Bernoulli's Spool (Created page with "{{NewDemo|subject=Fluid Mechanics|topic=Fluid Dynamics|file1=Bernoulli's_Spool.gif}} A nail goes through the 3x5 card into the hole of the spool for stability. As long as air blows down though the hole the card will remain in position. '''Location: ''' * Drawer 12")
• 13:59, 7 April 2022 Physdemo talk contribs created page Venturi Tube (Created page with "{{NewDemo|subject=Fluid Mechanics|topic=Fluid Dynamics|file1=Venturi_Tubes.gif}} This uses water in manometers to show the pressure differences within the metal tube. With no air flow the columns of water are level within each tube. With air flow the water rises toward the open end of the tube, the difference in column height within each tube showing the pressure. Tube 1 is highest, 2 is lowest, and 3 and 4 are in the middle and equal. Rubber hoses may be connected betw...")
• 13:59, 7 April 2022 Physdemo talk contribs created page Spinning Styro Cup--Curve Ball (Created page with "{{NewDemo|subject=Fluid Mechanics|topic=Fluid Dynamics|file1=Venturi_Tubes.gif}} This uses water in manometers to show the pressure differences within the metal tube. With no air flow the columns of water are level within each tube. With air flow the water rises toward the open end of the tube, the difference in column height within each tube showing the pressure. Tube 1 is highest, 2 is lowest, and 3 and 4 are in the middle and equal. Rubber hoses may be connected betw...")
• 13:54, 7 April 2022 Physdemo talk contribs created page Bernoulli's Ping Pong Ball (Created page with "{{NewDemo|subject=Mechanics|topic=Fluid Dynamics|file1=Bernouli's Ping Pong Ball.gif}} When air is blown through the funnel, the force on the ping-pong ball is into the funnel. The ball can not be blown out. It will also remain in an inverted funnel so long as the air flow continues. The ping-pong ball will also be held aloft by a steady stream of air. With practice the ball can be held aloft with the air blowing at it from an angle. '''Location: ''' * Ping-Pong Ball:...")
• 13:52, 7 April 2022 Physdemo talk contribs created page Smoke Ring (Created page with "{{NewDemo|subject=Fluid Mechanics|topic=Fluid Dynamics|file1=Smoke_Rings.gif}} Use touch paper to fill the cylinder with smoke. Tap on the rubber sheet to make the smoke rings come out the hole on the other end. '''Location:''' * Shelf F-3")
• 13:50, 7 April 2022 Physdemo talk contribs created page Ping Pong Ball Cannon (Created page with "{{NewDemo|subject=Fluid Mechanics|topic=Fluid Statics|file1=cannon1.jpg|file2=cannon2.jpg|file3=cannon3.jpg}} Get a ping pong ball to travel at very high speeds and destroy some soda cans using a vacuum pump. For safety, please do NOT EVER stand directly in front or behind of the cannon when the vacuum pump is running. Additionally, please be cautious where the cannon is aimed. This demo is ideally done in larger rooms (e.g. Willamette Hall atrium, WIL100, or outdoors)...")
• 13:49, 7 April 2022 Physdemo talk contribs created page Pressure Bottle (Created page with "{{NewDemo|subject=Fluid Mechanics|topic=Fluid Statics|file1=harbott.GIF}} This demo demonstrates reduced air pressure. When the rubber stopper is in the bottom, the air pressure inside the bottle prevents you from blowing up the balloon. The balloon can be inflated when the stopper is out. After the balloon is inflated, and the stopper reinserted, it will remain inflated. The balloon can be filled with water, and will produce a geyser when the stopper is removed. '''Lo...")
• 13:48, 7 April 2022 Physdemo talk contribs created page Coke Bottle Trick (Created page with "{{NewDemo|subject=Fluid Mechanics|topic=Fluid Statics|file1=}} In this demo, a Coke bottle is filled with water and a card is placed over the open end. The bottle is inverted and the card held in place until all of the air in the bottle is captured in the bottom end of the bottle. The card will now stay in place without aid. This demonstrates that the air pressure outside the bottle is greater than the pressure of the water, holding the card in place. '''Location: '''")
• 13:48, 7 April 2022 Physdemo talk contribs created page Crushing the 55-gallon Drum (Created page with "{{NewDemo|subject=Fluid Mechanics|topic=Fluid Statics|file1=Crushing_the_55_Gal_Drum.gif}} POP CAN: A small amount of water is placed in a pop can. The can is placed on a hot plate and heated until steam is coming out the top. The can is grasped off the hot plate and turned upside-down into a beaker of cold water. The condensed steam reduces the pressure & the can collapses. 55-GALLON DRUM: The same process can be used to collapse a 55-gallon drum. Water in the drum is...")
• 13:46, 7 April 2022 Physdemo talk contribs created page Magdeburg Hemispheres (Created page with "{{NewDemo|subject=Fluid Mechanics|topic=Fluid Statics|file1=Madgeberg Hemispheres.gif}} When the air is removed between these two hemispheres it becomes difficult to separate them. Steel spheres which require a vacuum pump or matching rubber suction cups are available. ''' Location:''' * Drawer 14")
• 13:46, 7 April 2022 Physdemo talk contribs created page Leaky Can (Created page with "{{NewDemo|subject=Fluid Mechanics|topic=Fluid Statics|file1=leakycan.jpg}} Fill this can with water and it will come out of three holes at different heights. The water out of the lower hole will go farther showing the higher pressure. '''Location:''' * Shelf T-1 *")
• 13:46, 7 April 2022 Physdemo talk contribs created page Pascal's Vases (Created page with "{{NewDemo|subject=Fluid Mechanics|topic=Fluid Statics|file1=Pascal's Vases.gif}} These variously shaped containers will show that the height of the water is independent of the vessel's shape. Two sizes available: a large one and a small one. '''Location: ''' * Large: Shelf T-3 * Small: Shelf T-1")

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