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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• 12:25, 14 April 2022 Physdemo talk contribs created page Whistle Tube (Created page with "{{NewDemo|subject=OWS|topic=Sound|file1=Whistle_Tube.gif}} '''Location:''' *")
• 12:24, 14 April 2022 Physdemo talk contribs created page Savart's Toothed Wheels (Created page with "{{NewDemo|subject=OWS|topic=Sound|file1=}} '''Location:''' * Dr. 33")
• 12:24, 14 April 2022 Physdemo talk contribs created page Reverb Cups (Created page with "{{NewDemo|subject=OWS|topic=Sound|file1=Reverb_Cup.gif}} Similar to the classic cup and string telephone except that this uses a spring. Shake the cup to send large waves down the spring and create sounds similar to whale songs or star trek laser blasts. Speak into the cup and the spring will create an echoing effect. A similar device is called a reverb when used with electronic instruments -- esp. guitars. '''Location: ''' * Shelf D-2")
• 12:23, 14 April 2022 Physdemo talk contribs created page Sonometer (Created page with "{{NewDemo|subject=OWS|topic=Sound|file1=sonometer_01.jpg|file2=sonometer_02.jpg}} A sonometer. Use the pointy wood blocks to change the note; there are markings on the top of the sonometer to indicate octaves, etc. The tension in the plastic string can be adjusted using weights. '''Location: ''' * Sonometer and wood blocks: Shelf E-0 * Weights: Shelf A-4")
• 12:22, 14 April 2022 Physdemo talk contribs created page Hoot Tubes (Created page with "{{NewDemo|subject=OWS|topic=Sound|file1=Hoot_Tubes.gif}} A metal tube has a metal screen placed inside it a short distance from one end. Place the tube over a burner to heat up the screen and then remove the tube from the burner. With the tube in a vertical position the cooling screen sets up a sound vibration. The length of the tube picks out the resonating wave length. Turn the tube horizontally and the sound stops. The largest, ~5 ft. x 6 in., has been dubbed "The Vo...")
• 12:22, 14 April 2022 Physdemo talk contribs created page Musical Instruments (Created page with "{{NewDemo|subject=OWS|topic=Sound|file1=Musical_Instruments.gif}} A variety of musical instruments. '''Location: ''' * Guitar: side of Shelf F * Whistles/flutes: Dr. 36 * Casio keyboard: Sh. D-1 * Resonance tubes: Sh. D-2 * Xylophone & mallets: Sh. D-4")
• 12:21, 14 April 2022 Physdemo talk contribs created page Tuning Forks--Matched Pair (Created page with "{{NewDemo|subject=OWS|topic=Sound|file1=Tuning Forks Matched Pair.gif}} Both forks sound at the same pitch. When the open ends of the boxes are set together, one fork can be started and it will drive the other. '''Location: ''' * Shelf D-4")
• 12:20, 14 April 2022 Physdemo talk contribs created page Jar Whistle (Created page with "{{NewDemo|subject=OWS|topic=Sound|file1=Jar_Whistle.gif}} The classic blowing into a bottle to make it whistle. With the addition tubes of different lengths the tone can be changed. '''Location: ''' * Shelf D-4")
• 11:35, 13 April 2022 Physdemo talk contribs created page Singing Rod (Created page with "{{NewDemo|subject=OWS|topic=Sound|file1=Singing Rod.gif}} With practice this aluminum rod can be set resonating by pulling it between thumb and finger. It must be held at a nodal point. If you're really good you can show the differences of the primary and secondary tones. '''Location:''' * Next to Shelf E")
• 11:25, 13 April 2022 Stanmick talk contribs created page File:Beat Frequency pic.png
• 11:25, 13 April 2022 Stanmick talk contribs uploaded File:Beat Frequency pic.png
• 11:22, 13 April 2022 Physdemo talk contribs changed group membership for Stanmick from (none) to administrator
• 11:20, 13 April 2022 User account Stanmick talk contribs was created
• 11:17, 13 April 2022 Physdemo talk contribs created page Longitudinal Wave Machine (Created page with "{{NewDemo|subject=OWS|topic=Waves|file1=Longitudinal Wave Machine.gif}}")
• 10:48, 13 April 2022 Physdemo talk contribs created page Interference--Beats (Added Demo description) Tag: Visual edit
• 10:19, 13 April 2022 Physdemo talk contribs created page Wine glass shatters (Created page with "{{NewDemo|subject=OWS|topic=Sound|file1=}} 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:''' * Enclosure with Horn D...")
• 10:17, 13 April 2022 Physdemo talk contribs created page Siren Disk (Created page with "{{NewDemo|subject=OWS|topic=Sound|file1=Siren_Disk.gif}} '''Location: ''' * Shelf H-2") Tag: Visual edit: Switched
• 10:16, 13 April 2022 Physdemo talk contribs created page Bell in a Jar (Created page with "{{NewDemo|subject=OWS|topic=Sound|file1=Bell in a Jar.gif}} The classic demonstration of sound's dependence upon a medium. Set the door bell ringing and then evacuate the bell jar. As the air leaves the sound stops. '''Location: ''' * Shelf T-1")
• 10:13, 13 April 2022 Physdemo talk contribs created page Wave Pendulum (Created page with "{{NewDemo|subject=OWS|topic=Waves|file1=WavePendulum.jpg}} Precisely calculated lengths show oscillations and modes. Most easily started with a large board or by gently tipping the apparatus, then releasing. '''Location: ''' * Wave Pendulum: Project Room * Boards: I-right")
• 10:11, 13 April 2022 Physdemo talk contribs created page Open and Closed Ended Reflection (Created page with "{{NewDemo|subject=OWS|topic=Waves|file1=Open and Closed Ended Refle.gif}} Hitting the rubber cork with the mallet produces a sound pulse which will bounce back and forth in the tube. Set up Super Sound to be triggered by the pulse. The pulse will be inverted at an open end and not inverted at a closed end. If the cork is in the tube (one end open one end closed) each successive pulse to hit the mic will be inverted, if the cork is held just outside the tube (both ends o...")
• 10:10, 13 April 2022 Physdemo talk contribs created page Standing Wave--Flame Tube (Created page with "{{NewDemo|subject=OWS|topic=Waves|file1=Standing Wave--Flame Tube.gif}} A long tube with lots of holes along the top which are lit. When the end is driven by a signal generator, a standing wave can bee seen in the height of the flames. CAUTION: Do not leave the gas on for more than a few minutes! '''Location: ''' * Next to Shelf F")
• 10:09, 13 April 2022 Physdemo talk contribs created page Rubber Rope (Created page with "{{NewDemo|subject=OWS|topic=Waves|file1=Rubber_Rope.gif}} A rubber hose is tied to a wall and set oscillating by a variable speed motor. A strobe light may work well to increase the visibility of the wave. '''Location: ''' * Sh. C-4: motor * Dr. 45 or Dr. 55: rubber hose")
• 10:09, 13 April 2022 Physdemo talk contribs created page Ripple Tank (Created page with "{{NewDemo|subject=OWS|topic=Waves|file1=}} Lots of ripple tank demos. Most easily seen on Film Loops, but an actual ripple tank can be set up. '''Location: ''' *")
• 10:03, 13 April 2022 Physdemo talk contribs created page Longitudinal Waves (Created page with "{{NewDemo|subject=OWS|topic=Waves|file1=Longitudinal Waves-Slinky.gif}} A slinky. '''Location: ''' * Drawer 45")
• 10:00, 13 April 2022 Physdemo talk contribs created page Resonance Tube (Created page with "{{NewDemo|subject=OWS|topic=Waves|file1=Resonance_Tube.gif}} A speaker is mounted on a plunger within a tube. Drive the speaker with a signal generator. As the position of the speaker is changed the volume heard will change, getting loudest at resonance. '''Location:''' * Next to Shelf E")
• 09:59, 13 April 2022 Physdemo talk contribs created page Interference--Sound Max and Min (Created page with "{{NewDemo|subject=OWS|topic=Waves|file1=Interference Sound Max Min.gif}} A common signal is sent to two speakers on a rotating shaft. As the speakers are rotated the maxima and minima created by the interference from the two signals moves about the class room. This is best detected if the students plug one ear. '''Location: ''' * On top of the Film Loops Cabinet *")
• 09:58, 13 April 2022 Physdemo talk contribs created page Doppler Effect 2 (Created page with "{{NewDemo|subject=OWS|topic=Waves|file1=Interference_Sound_Max_Min.gif}} Four speakers on two arms are rotated by a motor. A common signal is sent to selected speakers. As this spins one speaker approaches, the other is moving away and beats can be heard created by the slightly different frequencies being created. '''Location: ''' * On top of the Film Loops Cabinet")
• 09:38, 13 April 2022 Physdemo talk contribs created page Doppler Effect (Created page with "{{NewDemo|subject=OWS|topic=Waves|file1=Doppler Effect.gif}} A foam ball that holds a 9 volt battery and a small buzzer. Throw it over the heads of the students and the doppler effect is well perceived. '''Location:''' * Shelf D-4")
• 09:37, 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...")
• 09:19, 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...")
• 09:19, 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")
• 09:11, 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...")
• 09:10, 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
• 09:05, 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
• 09:04, 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
• 08:38, 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...")
• 11:34, 11 April 2022 Physdemo talk contribs created page Fourier Synthesizer (Created page with "{{NewDemo|subject=OWS|topic=Waves|file1=}}")
• 11:33, 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...")
• 11:28, 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")
• 11:24, 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")
• 11:22, 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>")
• 11:20, 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")
• 11:14, 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")
• 11:14, 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...")
• 11:11, 11 April 2022 Physdemo talk contribs created page File:Glassbreak.webm
• 11:11, 11 April 2022 Physdemo talk contribs uploaded File:Glassbreak.webm
• 10:49, 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...")
• 10:48, 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")
• 10:47, 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")
• 10:46, 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")

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