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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• 11:10, 20 April 2022 Physdemo talk contribs created page Leydon Jars (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Capacitance|file1=Leydon Jars.gif}} Old glass jar with foil on the inside and outside. A very basic and visual capacitor. '''Location: ''' * Shelf I-2 *")
• 11:08, 20 April 2022 Physdemo talk contribs created page Human Conductor Circuit (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Resistance, EMF, and Current|file1=Human Conductor.jpg}} A safety bulb is lit up when a conductive path connects the two leads. Works with upwards of 20 people. Brightness can vary with resistance and quality of contact to double as a good demonstration of resistance as well as conduction. You might also wet your hands and touch the leads to show a sudden decrease in resistance. Inserting a metal rod, a plastic rod, and...")
• 11:08, 20 April 2022 Physdemo talk contribs created page Parallel Circuits: Large Rheostats (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Resistance, EMF, and Current|file1=}} Two large rheostats are hooked in parallel with large meters or overhead meters. '''Location: ''' * Rheostats: Drawer 79 * Large meters: Shelf K-2 * Overhead Meters: Drawer 83 * Power Supplies: Shelf K-3") Tag: Visual edit: Switched
• 11:06, 20 April 2022 Physdemo talk contribs moved page Series Circuit:LargeRheostats to Series Circuit: Large Rheostats without leaving a redirect
• 11:06, 20 April 2022 Physdemo talk contribs created page Series Circuit:LargeRheostats (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Resistance, EMF, and Current|file1=}} Two large rheostats are hooked in series with large meters or overhead meters. '''Location: ''' * Rheostats: Drawer 79 * Large meters: Shelf K-2 * Overhead Meters: Drawer 83 * Power Supplies: Shelf K-3")
• 11:06, 20 April 2022 Physdemo talk contribs created page Fuse Demo (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Resistance, EMF, and Current|file1=}} Three light bulbs are hooked up in parallel with a piece of nichrome wire as a fuse in series with the bulbs. When the fuse burns up all the bulbs go out. '''Location: ''' * Sockets: Shelf K-2 * Fuse wire: Shelf K-2")
• 11:06, 20 April 2022 Physdemo talk contribs created page Parallel Circuit with Light Bulbs (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Resistance, EMF, and Current|file1=}} Two or three light bulbs are hooked in parallel. Unscrewing any one of the light bulbs has no effect on the other ones. Bulbs of different wattage can be used showing the dependance of current and power. '''Location: ''' * Light Bulbs: Drawer 113 * Light Bulb Sockets: Shelf K-2")
• 11:05, 20 April 2022 Physdemo talk contribs created page Series Circuit with Light Bulbs (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Resistance, EMF, and Current|file1=}} Two light bulbs are hooked in series. A third light bulb is connected directly to a variac (120v). The two series bulbs are half as bright and when the variac is adjusted to the brightness of the series bulbs it is at 50%. When a 75w bulb and a 25w bulb are connected in series only the 25w bulb lights up because it has a higher resistance and therefore most of the available voltage i...")
• 11:05, 20 April 2022 Physdemo talk contribs created page Current Analogy--water flow (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Resistance, EMF, and Current|file1=Current Analog-water flow.gif}} A large jug filled with water is drained by two tubes. One has a significantly larger diameter than the other. The pressure (analogous to electric potential) is the same for both tubes. The larger diameter tube allows more water to flow (small resistance) than the small diameter tube (large resistance). '''Location: ''' * Large Water Container: Shelf T-2...")
• 11:04, 20 April 2022 Physdemo talk contribs created page Current Analogy--marble and pins (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Resistance, EMF, and Current|file1=Marble and pins analogy.gif}} A marble falls through obstacles. '''Location: ''' * Shelf J-1 *")
• 11:03, 20 April 2022 Physdemo talk contribs created page Current: Transfer of Charge (Visible Resistor) (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Resistance, EMF, and Current|file1=VisibleResistor.gif}} The parallel-plate capacitor is connected to a high-voltage power supply with the electrometer connected in series to monitor the current (10 microamps). A ping-pong ball covered with conductive paint dangles between the two plates. When the power supply is turned on, the ball oscillates between the two plates, transferring charge. The higher the voltage or the clo...")
• 11:03, 20 April 2022 Physdemo talk contribs created page Piezoelectricity (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Resistance, EMF, and Current|file1=}} A trigger puts pressure on a crystal that produces a high potential causing a spark. '''Location: ''' * Drawer 57 or 82")
• 11:02, 20 April 2022 Physdemo talk contribs created page Thermocouple (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Resistance, EMF, and Current|file1=}} Two different metal wires such as Chromel and Constantan ( Type E) are twisted together at each end. One wire is cut in the middle and a volt meter is placed to measure the potential difference which is produced by sticking each end into a bath of different temperatures such as ice water and boiling water '''Location: ''' * Drawer 57 or 82 *")
• 11:02, 20 April 2022 Physdemo talk contribs created page Lemon Battery (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Resistance, EMF, and Current|file1=}} Zinc plated nails and copper wires are inserted into a lemon and a voltage is produced. Voltage can be measured or five lemon batteries can be hooked in series and connected to a capacitor. Ignite a flash cube with the voltage stored in the capacitor '''Location: ''' * Drawer 69")
• 11:02, 20 April 2022 Physdemo talk contribs created page Electrolysis (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Resistance, EMF, and Current|file1=}} Oxygen and hydrogen are separated from water by applying a voltage across electrodes. Hydrogen can be collected in a test tube and ignited. '''Location: ''' * Shelf T-3")
• 10:59, 20 April 2022 Physdemo talk contribs created page Plasma Ball (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electric Fields and Potential|file1=plasma.jpg}} Plasma ball lights fluorescent bulb through induction. Plasma attracts to anything connected to ground (hands, light bulbs, etc.). '''Location:''' * Plasma Ball: T-0 * Fluorescent Bulbs: I-2")
• 10:58, 20 April 2022 Physdemo talk contribs created page Electric Deflection of Electron Beam (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electric Fields and Potential|file1=Electric Deflec of Electron.gif}} The beam from an electron gun can be deflected by the field of two parallel plates. The beam is intercepted by an angled phosphorous coated screen (with grid) which glows to show the path of the beam. '''Location: ''' * Cathode Ray Apparatus: Shelf L-2 * High Voltage Supply: Shelf K-3")
• 10:58, 20 April 2022 Physdemo talk contribs created page Jacob's Ladder (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electric Fields and Potential|file1=Jacobs Ladder.gif}} A high voltage transformer has two aluminum rods attached to it. The distance between the rods is tapered narrow at the bottom and wide at the top. Breakdown occurs at the bottom and then the spark rises due to the heated air. A new spark starts at the bottom when previous spark reaches the top. The sparks will ignite a piece of paper placed between the rods for add...")
• 10:57, 20 April 2022 Physdemo talk contribs created page Faraday's Pail (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electric Fields and Potential|file1=}} Demonstrates the distribution and induction of electrostatic charge. A charged object is suspended inside the metal can, the inside of the can charges to the opposite sign and the outside becomes charge with the same sign. The induced charge equals the inducing charge. '''Location: ''' * Shelf I-4")
• 10:57, 20 April 2022 Physdemo talk contribs created page Cone and Plate Conductor (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electric Fields and Potential|file1=Cone and Plate Conductor.gif}} Place a charge on the cone or a high voltage between the cone and plate (which are separated by an insulator). Measure the field at various points with Faraday Cage, Electrometer and proof Planes. '''Location:''' * Cone/Plate: Shelf I-4 * Electrometer: Shelf K-3")
• 10:57, 20 April 2022 Physdemo talk contribs created page Gauss's Law, Radio in a Cage (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electric Fields and Potential|file1=}} Demonstrates Gauss's Law. Place a radio inside Faraday Cage and it becomes silent. '''Location: ''' * Cage: Shelf I-4 * Transistor radio: Shelf K-4")
• 10:56, 20 April 2022 Physdemo talk contribs created page Gauss's Law, Faraday's Cage (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electric Fields and Potential|file1=Faradays Cage.gif}} Demonstrates Gauss's Law. Voltage difference will be proportional to charge inside. With the use of proof planes one can detect the presence of electric fields and the relative intensity of electric fields.and measure charge and potential. '''Location:''' * Cage & Accessories: Shelf I-4 * Electrometer: Shelf K-3 *")
• 10:54, 20 April 2022 Physdemo talk contribs created page Electrostatic Field Demonstrator (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electric Fields and Potentials|file1=Electrostatic Field.gif}} Variously shaped and spaced conductors are placed in a bath of mineral oil. Grass seed is sprinkled on top of the oil. A high potential from a small Van de Graff generator is placed on the conductors. The field is mapped by the alignment of the grass s eed floating on the oil. Oil Bath tank is placed on an overhead for classroom presentation. Option 2 A self...")
• 10:53, 20 April 2022 Physdemo talk contribs created page Electrostatic Friction Rods (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electrostatics|file1=}} Friction rods when rubbed become charged. Black plastic rod becomes negatively charged when rubbed with rabbit fur. Clear plexiglass rod becomes positively charged when rubbed with a piece of felt. Location: Friction Rods: Drawer 68 Charging Fur & Felt: Drawer 68")
• 10:51, 20 April 2022 Physdemo talk contribs created page Conservation of Charge (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electrostatics|file1=Faradays Cage.gif}} Faraday Cage is setup. Two proof planes, one having a piece of material on it, are placed in the cage. The cage is grounded to neutralize any charge on or in the cage. The two planes are now rubbed together while in the cage. Take each plane out and notice that one is charged negative, the other positive but when they are both in the cage the net charge is zero. '''Location:'''...")
• 10:50, 20 April 2022 Physdemo talk contribs created page 2 by 4 pull (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electrostatics|file1=Two by Four Pull.gif}} A 2x4 is balanced on a watch glass. An electrostaticly charged rod provides enough force to turn the board. '''Location: ''' * 2x4: Wall next to Shelf A * Watch Glass: Drawer 137 * Friction Rods: Drawer 68 * Charging Fur & Felt: Drawer 68")
• 10:49, 20 April 2022 Physdemo talk contribs created page Whimhurst Machine (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electrostatics|file1=Wimhurst Machine.gif}} Electrostatic induction machine that is able to build up a high quantity of charge and develop a high voltage. Generate sparks jumping a gap of 4 - 5 inches. Two Leyden jars can be hooked in series to obtain a high voltage. '''Location:''' * Shelf O-3")
• 10:49, 20 April 2022 Physdemo talk contribs created page Van de Graff Generator (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electrostatics|file1=Van de Graff Generator.gif}} An excellent producer of electrostatic charge-- produces up to 400,000 volts--with many uses. Attach string to the sphere to show field lines. Styrofoam peanuts or a piece of fur will fly off. A small wire device will spin when placed on or near the sphere. It will light a fluorescent bulb when one end is held near by. An insulating stand is available for causing standing...")
• 10:48, 20 April 2022 Physdemo talk contribs created page Electrophorus Plates (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electrostatics|file1=Electrophorous_plates.gif}} This produces a large supply of static charge by induction. Rub the bottom plastic plate with fur, place the aluminum disk onto the plastic and touch the plate, then remove the plate which is now charged. The last two steps can be repeated a number of times, providing a continual source of static charge. '''Location:''' * I-3")
• 10:47, 20 April 2022 Physdemo talk contribs created page Electroscope for overhead (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electrostatics|file1=Electroscope For Overhead.gif}} This device is also used for a variety of demos to show the presence of electrostatic charge. When a charged rod is brought near the plate the needle will move. Scrape the rod on the plate and it will become charged and the needle will stay deflected. Bring an object of opposite charge and the deflection will decrease. '''Location:''' * Shelf I-3")
• 10:46, 20 April 2022 Physdemo talk contribs created page Pith Balls (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electrostatics|file1=Pith Balls.gif}} Charge up pith balls with friction rods to show like charges repel and opposite charges attract. '''Location:''' * Shelf I-3 & Drawer 62")
• 10:46, 20 April 2022 Physdemo talk contribs created page Electroscope (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electrostatics|file1=Electroscope.gif}} This device is also used for a variety of demos to show the presence of electrostatic charge. When a charged rod is brought near the plate the needle will move. Scrape the rod on the plate and it will become charged and the needle will stay deflected. Bring an object of opposite charge and the deflection will decrease. '''Location:''' * Shelf I-3") Tag: Visual edit: Switched
• 14:23, 14 April 2022 Physdemo talk contribs created page Radiation Emission (Created page with "{{NewDemo|subject=Thermodynamics|topic=Transfer of Heat|file1=}} A half silver, half black can is placed over a light bulb which uniformly heats the can. The radiation sensor registers a higher voltage when it is pointed at the black surface than at the silver, demonstrating that a good absorber of radiation is also a good emitter. '''Location: ''' * Shelf E-4")
• 14:23, 14 April 2022 Physdemo talk contribs created page Thermopile Radiation Sensor (Created page with "{{NewDemo|subject=Thermodynamics|topic=Transfer of Heat|file1=thermopile.gif}} A sensor that converts thermal radiation to a voltage. Works best when connected to the Keithly Electrometer. When the sensor is directed at a warm or hot surface a positive voltage is observed. When it is pointed at a cold surface, like a beaker of ic e water, a negative voltage is observed. '''Location: ''' * Drawer 53")
• 14:23, 14 April 2022 Physdemo talk contribs created page Black vs. Silver body Radiation (Created page with "{{NewDemo|subject=Thermodynamics|topic=Transfer of Heat|file1=Black vs Silver.gif}} The cans are filled with hot water and thermometers are placed inside the cans. The cans sit for 15 minutes or more and the temperature is observed. The temperature of the black can will be lower. Note: The cans should be placed on an insulating surface such as styrofoam. '''Location: ''' * Shelf E-4")
• 14:22, 14 April 2022 Physdemo talk contribs created page Comparative Thermal Conduction (Created page with "{{NewDemo|subject=Thermodynamics|topic=Transfer of Heat|file1=Comparative Thermal Capacity.jpg|file2=Comparative thermal Capacity Re-waxing.jpg}} SAFETY NOTICE: This demo involves fire and very hot metal so you will need gloves, goggles/safety glasses, and a fire extinguisher. TIE UP lose hair and clothing. Fill the alcohol burner about half way with ethanol and allow the wick a couple minutes to begin soaking up the alcohol. Place the star-shaped rod composed of diffe...")
• 14:20, 14 April 2022 Physdemo talk contribs created page Comparative Heat Capacity (Created page with "{{NewDemo|subject=Thermodynamics|topic=Transfer of Heat|file1=Comparative Heat.gif}} The three metal specimens are mounted on the suport rod, then immersed in boiling water to insure they come to a uniform temperature. Specimens are then dried off and placed on a flat sheet of wax. The depth to which the metal specimens sink is a measure of the specific heat of each. '''Location: ''' * Wax: Drawer 47 *")
• 14:18, 14 April 2022 Physdemo talk contribs created page Boiling Water in a Paper Cup (Created page with "{{NewDemo|subject=Thermodynamics|topic=Transfer of Heat|file1=}} SAFETY NOTICE: This demo involves fire so you will need gloves, goggles/safety glasses, and a fire extinguisher. TIE UP lose hair and clothing. When you connect the rubber tubing make sure to connect it to GAS not AIR. Fill the paper cup COMPLETELY with water. If you do not the top will ignite. Place the water cup in the ring burner but make sure to position the cup so that the seam is placed towards the...")
• 14:17, 14 April 2022 Physdemo talk contribs created page Water Balloons (Created page with "{{NewDemo|subject=Thermodynamics|topic=Transfer of Heat|file1=}} A balloon is filled with water. The water balloon is placed over a flame and the balloon will not break since the heat is conducted away. '''Location: ''' * Balloons: Drawer 30")
• 14:17, 14 April 2022 Physdemo talk contribs created page Smoke Stack (Created page with "{{NewDemo|subject=Thermodynamics|topic=Transfer of Heat|file1=Smoke_Stack.gif}} A chamber with two chimneys on top has a candle placed inside it. The heated air flows out of the chimney above the candle, causing air to be drawn into the other chimney. Touch paper generates smoke after itis lit. When held above the cool chimney the smoke makes the convection flow visible. The flow is more visible if the chimnies are illuminated from the side by a projector. '''Location:...")
• 14:16, 14 April 2022 Physdemo talk contribs created page Crook's Radiometer (Created page with "{{NewDemo|subject=Thermodynamics|topic=Kinetic Theory|file1=Crooks_Radiometer.gif}} A sealed ball has vanes on which one side is black and the other white. When the sun or another source of bright light is directed onto the vane, it begins to rotate. '''Location: ''' * Shelf E-4")
• 14:15, 14 April 2022 Physdemo talk contribs created page Kinetic Motion Apparatus (Created page with "{{NewDemo|subject=Thermodynamics|topic=Kinetic Theory|file1=Kinetic Motion App.gif}} A container that has vibrating walls is filled with little balls of various sizes and placed on an overhead. When the walls are set into vibration a molecular motion model is observed by the students. '''Location: ''' * Shelf F-3 *")
• 14:14, 14 April 2022 Physdemo talk contribs created page Steam (Created page with "{{NewDemo|subject=Thermodynamics|topic=Entropy and the Second Law|file1=Heat_Engine--Steam.gif}} A steam Engine. '''Location: ''' * Shelf F-2")
• 14:13, 14 April 2022 Physdemo talk contribs created page Stirling Cycle (Created page with "{{NewDemo|subject=Thermodynamics|topic=Entropy and the Second Law|file1=Stirling_Cycle.gif}} Demonstrates the Stirling Cycle '''Location: ''' * Shelf F-2")
• 14:13, 14 April 2022 Physdemo talk contribs created page Thermo-Electric Converter (Created page with "{{NewDemo|subject=Thermodynamics|topic=Entropy and the Second Law|file1=Thermo Electric Converter.gif}} Two small electric motors are connected to a device which takes a thermal difference and converts it into a voltage. One engine is placed into reservoirs of boiling water and ice water which turns the propeller. The second engine is then placed into the ice water and a reservoir of liquid nitrogen and its propeller starts to turn. Demonstrates that work depends on res...")
• 14:12, 14 April 2022 Physdemo talk contribs created page Reversible Process (Created page with "{{NewDemo|subject=Thermodynamics|topic=Entropy and the Second Law|file1=Reversible_Process.gif}} A solution of Karo syrup or glycerin is between a rotating cylinder and a plexiglass container. A spot of colored syrup is placed in the apparatus. As the cylinder is turned the spot spreads out. The spot can be brought back by reversing the direction the cylinder is turned. '''Location: ''' * Shelf T-2 *")
• 14:10, 14 April 2022 Physdemo talk contribs moved page Mechanical Equiv. of Heat to Mechanical Equivalent of Heat
• 14:09, 14 April 2022 Physdemo talk contribs created page Mechanical Equiv. of Heat (Created page with "{{NewDemo|subject=Thermodynamics|topic=Heat and the First Law|file1=Mechanical_equiv_of_Heat.gif}} A copper calorimeter is attatched to a crank. A rope is wrapped around the calorimeter and attatched to a 1 kg. mass. When the crank is turned the mass is raised a few centimeters off the floor and held there by the frictional force between the rope and calorimeter. The mechanical equivalent of heat can be calculated by determining the frictional work done by the calorimet...")
• 14:08, 14 April 2022 Physdemo talk contribs created page Parabolic Thermal Reflectors (Created page with "{{NewDemo|subject=Thermodynamics|topic=Heat and the First Law|file1=Parabolic_Thermal_Reflec.gif}} Two parabolic reflectors are aligned to demonstrate heat transfer by radiation. A thermometer or the radiation sensor is placed at the focal point of one of the reflectors. At the other focal point a small amount of alcohol is burned, or an object that has been chilled in liquid nitrogen is placed. The temperature will rise or fall depending on whether the object is hot or...")
• 14:08, 14 April 2022 Physdemo talk contribs created page Cloud Maker -- Adiabatic Expansion (Created page with "{{NewDemo|subject=Thermodynamics|topic=Heat and the First Law|file1=Adiabatic_Clouds.gif}} A small amount of smoke from a burning match is introduced into the flask and the air is inside is saturated with water vapor by shaking the water inside. Pressing the bulb compresses the air in the flask, and releasing it causes expansion and cooling, forming a cloud. '''Location: ''' * Shelf T-2")

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