A+0+5 Timed free fall: Ball drops 2 meters through electronic timing gate.
A+0+10 Atwood machine: Unbalanced weights on a pulley accelerate slowly.
A+0+15 A falling weight accelerates a car horizontally.
A+0+20 Acceleration of a steel ball down an inclined plane with metronome.
A+0+22 Inclined airtrack with gliders and timing gates.
A+0+25 Cork float accelerometer: Cork and water in sealed flask.
A+0+30 A chain dropped onto a spring scale.
A+0+35 A ball swung on a string held by a sleeve.
A+0+40 Conical pendulum: Similar to A+0+35 with standard weights.
A+0+45 Loop the loop: Sphere, hoop, disk rolled down a looped track.
A+0+47 Swing water in a bucket.
A+0+50 Candles rotating about an axis.
A+0+55 Mercury and colored water in a rotating glass vessel.
A+0+56 Flattening of the earth: Rotating brass hoops.
A+0+57 Rotating loop of chain rolls across bench.
A+0+58 Mechanical governor device.
A+0+59 Chain lariat with hand drill or electric rotator.
A+0+60 Film: "Zero G", sound, 14 min.
A+0+65 Film: "Conservation laws in zero G", sound, 14 min.
A+0+70 Film loop: "Inertial forces: Centripetal acceleration", 3:15 min.
A+0+75 Film loop: "Inertial forces:Translational acceleration", 2:05 min.
A+0+80 Film loop: "Newton's law of motion", 3:40 min.
Conservation of Energy
Ball on string mounts on blackboard and pivots on lower rod.
A+5+5 Loop the loop: Sphere, hoop, disk rolled down looped track.
A+5+15 Brachistochrone: Three balls falling along different trajectories.
A+5+20 Bowling ball pendulum swings back to nose.
A+5+25 Film loop: "Conservation of energy: Pole vault", 3:55 min.
Frames of Reference
Film: "Frames of reference", sound, 28 min.
A+10+40 Film loop: "Galilean relativity I", ball dropped from mast of ship,2:55min.
A+10+45 Film loop:"Galilean relativity II", object dropped from aircraft, 3:40 min.
A+10+50 Film loop: "Galilean relativity III", projectile fired vertically, 3:00 min.
A+10+55 Film loop: "A matter of relative motion", 3:40 min.
Blocks, with various surfaces slide on an inclined plane.
A+12+1 Film: "A million to one", flea and dry ice puck, sound, 5 min.
A+12+5 Weighted wood block dragged horizontally by spring scale.
Weight on a vertical spring with markers on stand.
A+14+1 Block pulled horizontally by a spring scale.
A+14+5 Force table: Forces on a car on a horizontal table.
A+14+10 Force table: Forces on a car on an adjustable inclined plane.
A+14+15 Precision lever: Balance beam on stand plus weight set.
A+14+16 A meterstick lever on a free-standing fulcrum with weights.
A+14+17 Standard pan balance with assorted weights.
The Cavendish experiment: Model and actual apparatus to show.
A+15+1 Film loop: "The Cavendish experiment", 4:25 min.
A+15+10 Film loop: "Fixed systems of orbiting bodies", 3:40 min.
A+15+15 Film loop: "Moving system of orbiting bodies", 2:20 min.
A+15+20 Film loop: "Orbiting bodies in various force fields: Part I: Positive power laws", 2:35 min.
A+15+25 Film loop: "Orbiting bodies in various force fields: Part II: Negative power laws", 3:35 min.
A+15+30 Film: "The law of gravitation "(Feynman), sound, 56 min.
Card snapped from under a weight by a leaf spring.
A+20+5 Tablecloth yanked out from under dishes.
A+20+10 Breaking thread above and below weight.
A+20+15 Medicine ball to throw.
A+20+20 Sledge hammer hits large mass resting on person.
Two disks, one weighted in center and other on rim, roll down ramp.
A+25+5 Moment of inertia: Hoop or disk rotated by falling weight.
Minor's apparatus: Movable discs rotated by falling weight.
A+30+5 Maxwell's wheel: Flywheel with axle, supported on strings or stand.
A+30+10 Rotational inertia device: Sliding weights on rotating rod.
A+30+15 Rotating chair with dumbbells or weighted bicycle wheel.
A+30+20 Maxwell's top, has adjustable center of gravity.
A+30+25 Large conical aluminum top.
A+30+30 Gyroscopes; various.
A+30+35 Gyrocompass on model of the earth.
A+30+40 Film: "Conservation laws in zero G", sound, 14 min..
Balls of equal and unequal mass on strings, separated by a leaf spring.
A+35+5 Elastic collisions: Seven steel balls roll on a wooden track.
A+35+10 Elastic collisions: Four balls on strings and two unequal balls on strings.
A+35+16 .22 rifle fires vertically, bullet lifts small wood cylinder.
A+35+17 Ballistic pendulum: Suspended .22 rifle fires into suspended block.
A+35+20 Three meter airtrack with gliders that rebound elastically, or stick.
A+35+25 Plastic pucks on air table.
A+35+30 Mechanical model of a gas: Vibrating balls strike piston on OHP.
A+35+35 Airtrack: Long track with two gliders coupled by a spring hoop.
A+35+40 Train on circular track moves one way and track moves the other.
A+35+45 Film loop: "Colliding freight cars", 2:45 min.
A+35+50 Film loop: "Dynamics of a billiard ball", 4:00 min.
Motion in One Dimension
Airtrack: Glider passes "start" and "stop" gates on digital timer.
A+37+10 Electric winch tows car at constant speed.
Electric winch tows car at constant speed, then constant acceleration.
3"x 4" slides of standards and units and cassette tape of WWV.
A+45+10 Film: "Powers of ten", sound, 10 min.
A+45+15 Solids to show; cone, pyramid, icosahedron, etc.
Wall chart of metric system.
Dropped and shot balls hit bench simultaneously.
A+50+5 Water projector: Adjustable angle water jet in front of grid.
A+50+10 Monkey and the hunter.
A+50+15 Reaction jet: "L" tube rotates as water flows through it.
A+50+20 Rocket is filled with water and compressed air and launched vertically.
A+50+25 Carbon dioxide propelled rocket flies across room on wire.
A+50+26 Carbon dioxide propelled rotational device.
A+50+35 Ballistics car: Ball ejected from rolling car drops back in.
"Sweet Spot": Meterstick pivot point changes with point struck.
A+55+05 Rolling spool: String on spool is pulled at various angles.
A+55+10 Cycloid disk draws path on chalkboard.
Statics and Mechanical Equilibrium
Meterstick suspended in mid-air by horizontal strings and weights.
A+60+5 Force on hinged beam measured with dynamometer.
A+60+10 Forces on crane boom measured with dynamometer.
A+60+15 Two dynamometers measure forces from centered hanging mass.
A+60+16 Same as A+60+15, but mass in different position.
A+60+20 Car hangs balanced by forces in mid-air over removable inclined plane.
A+60+25 Disk (weighted off-center) rolls up inclined plane.
A+60+30 Irregular shapes to determine center of mass using plumb bob.
A+60+32 Center of gravity (toy) objects.
A+60+35 Static equilibrium for a rope on a spool. Same as A+55+5.
A+60+37 Rotation about the center of mass: Object to throw.
A+60+40 Anatomical models: Skull, Arm, Leg
Twisting a rod with one end fixed and the other hung with weights.
A+65+10 Torque wrench to demonstrate.
X,Y,Z-coordinate system with vector arrows.
A+70+5 Vector arrows of various sizes and colors fit in wooden bases.
A+70+10 Relative velocity: Three electric cars on tracks make chalk line.
A+70+20 Rope with slug(unit of mass) in center is lifted from ends.
A+70+25 Film loop: "Vector addition: Velocity of a boat", 3:35 min.
A+80+20 Chain hoist.
A+80+30 Block and tackle.
Mechanical model of a gas: Vibrating balls strike piston on OHP.
Simple Harmonic Motion
Mass on a spring.
B+10+1 Simple pendulum: Ball on a string.
B+10+2 Torsion pendulum with removable weights.
B+10+3 Compound pendulum: Meterstick with movable brass weight.
B+10+5 Large torsion pendulum with different diameter rods.
B+10+10 Physical pendulum: Steel bar with two pivot points.
B+10+15 Ball rolling in a spherical dish on OHP.
B+10+20 Large damped oscillator (mass on spring) with various damping disks.
B+10+25 Clock spring oscillator: Electrically driven and damped.
B+10+30 Damped oscillations: Flat steel spring with removable weights.
B+10+35 Lissajous figures with laser and two signal generators.
B+10+40 Transparencies: Lissajous figures for OHP.
B+10+45 Dot on a rotating disc for 3"x 4" slide projector.
B+10+50 Ball on turntable rotates beneath synchronized pendulum .
B+10+55 Turntable with velocity and acceleration arrows, shadow projected.
B+10+60 Tuning forks, various.
B+10+65 Pocket watch with mirror and laser twitches with balance wheel motion.
B+10+70 Four pendulums on rod: Same mass, different lengths.
Coupled Harmonic Oscillators
Two large pendulums coupled with spring.
B+15+1 Three large pendulums coupled with two springs.
B+15+5 Wilberforce pendulum: Oscillates between rotation and up-down.
B+15+10 Two pendulums on a frame of flexible steel.
B+15+15 Two balls hung on the same string, one in middle, one at the end.
Driven harmonic oscillator: Motor driven mass on spring.
B+20+5 Clock spring oscillator: Electrically driven and damped.
B+20+10 Damped oscillations in a resonant LCR circuit on an oscilloscope.
B+20+15 One tuning fork with tuned cavity, drives another.
B+20+20 Film : "Tacoma Narrows bridge collapse",silent, 4 min.
Set of three coupled inverted pendulums on wood base.
Transverse wave model, hand-cranked.
B+25+1 Transverse 3-dimensional wave model, hand-cranked.
B+25+5 Longitudinal wave model, hand-cranked.
B+25+10 Rubber rope stretched across front of room.
B+25+15 Brass spring on white plastic sheet.
B+25+20 Suspended slinky on threads for compression wave.
B+25+25 Mechanical water wave model, hand-cranked.
B+25+30 Torsional wave device, large or small.
Superposition : Fourier Principles/Complex Waves
Fourier series: Pasco harmonic synthesizer on an oscilloscope.
B+30+1 Transparencies: Fourier superpositions.
Large wood model of a double slit with hinged waves.
B+35+5 Acoustic interference with Quincke (trombone) tube and sonalert.
B+35+10 Interference of sound waves from two speakers, same generator.
B+35+12 Interference between two ultrasound sources (40 kHz).
B+35+15 Interference in a ripple tank uses arc lamp or incandescent light.
B+35+20 Beats with tuning forks on tuned cavities.
B+35+25 Beats with two beer bottles blown manually.
B+35+30 Beats from two speakers observed on an oscilloscope.
B+35+35 Film loop: "Multiple slit diffraction", 3:25 min.
B+35+40 Film loop: "Single slit diffraction", 3:30 min.
B+35+45 Film loop: "Interference of waves", 4:00 min.
Steel spring pendulum, inverted, vibrates at 10 Hz.
B+45+5 Giant tuning fork, barely audible, displayed with stroboscope.
B+45+10 Ultrasound transducers (40 kHz) as both sources and receivers.
B+45+15 Bell ringing in a jar evacuated with pump.
B+45+20 Savart's wheel: Toothed wheel and cardboard or air jet.
B+45+25 Siren: large, electric motor driven.
B+45+30 Compressed air jet blows through spinning disk with holes.
B+45+35 Sprockets on shaft rotate against a card to make sound.
B+45+40 Caruga horn: Varigated tube to blow through
B+45+45 Galton's whistle: Compressed air whistle.
B+45+50 Helmholtz resonators drive radiometer vanes: with tuning forks.
B+45+55 Casio electronic synthesizer with amp and speaker.
Model of standing and travelling wave superposition on 3x4 projector.
B+50+5 Model of longitudinal standing wave, hand-cranked.
B+50+10 Rope and strobe: Transverse standing waves, motor driven.
B+50+15 Reuben's tube: Standing sound waves in flames along a large pipe.
B+50+20 Set of eight organ pipes to make a major scale.
B+50+25 Tunable organ pipe.
B+50+30 Set of ten suspended metal rods struck with a wooden mallet.
B+50+45 Unbalanced spinning wheel vibrates spring steel reeds.
B+50+50 Sonometer: Resonant chamber with bowed strings (2).
B+50+55 Torison wave model.
Film loop: "Vibrations of a metal plate", 3:45 min.
B+55+1 Film loop: "Vibrations of a drum", 3:25 min.
B+55+5 Chladni's disc: Bowed disk forms patterns in sprinkled salt.
B+55+10 Large glass bowl with ping pong balls and violin bow.
B+55+15 Young's modulus rod: Hammer and rod with nodes marked.
B+55+20 Longitudinal wave apparatus: Ball bounces off end of stroked rod.
B+55+25 Kundt's tube: Powder in tube shows standing waves.
Speed of Sound
Speed of sound in air: Speaker resonates air column over water.
B+60+5 Measurement of speed of sound with microphone, speaker, oscilloscope.
Sonalert swung on the end of a string.
B+65+5 Film loop: "Formation of shock waves", 3:45 min.
B+65+10 Film loop: "Doppler effect", 3:45 min.
Music and the Ear
B+70+5 Film: "The Piano", sound, 27 min.
Humidity: Hygrometers to show.
Computer demo: Nesting can calorimeter, runs 3 min.
Carnot cycle models: Piston/cylinder, PVT surface.
C+10+5 Mechanical model of a gas: Vibrating balls strike piston on OHP.
C+10+10 Film loop: "Properties of a gas", 3:18 min.
Copper/wood cylinder wrapped with paper over bunsen burner.
C+15+1 Boiling water in paper cup; cup does not burn.
C+15+2 Copper gauze over flame; gas burns only above gauze.
C+15+3 Set of metal rods: Heat-sensitive paint changes color.
C+15+4 Computer demo: Conductivity (see C+15+3), runs 10 min.
Heat water in "O" shaped tube adding a dye.
C+20+5 Crooke's radiometer with flashlight, arc lamp or IR source.
C+20+10 Cardboard strip drawn from glass tube extinguishes candle.
C+20+15 Hot air balloon. (dry cleaner bag rises to ceiling)
Engines and Pumps
Engine models: Steam, 4-cycle Otto.
C+22+05 Model of an air pump.
C+22+10 Operating Sterling cycle engine.
Flettnor rotorship model in one meter square pan of water with fan.
C+25+05 Bernoulli's principle: Ball suspended in air stream.
C+25+10 Glass standpipes: Water flows through tube, heights vary.
C+25+11 Glass standpipes with a constriction. Similar to C+25+10.
C+25+15 Glass aspirator: Compressed air draws colored water up glass tube.
C+25+16 Compressed air through funnel sucks in ball.
C+25+17 Compressed air attracts card with pin to holder.
C+25+20 Venturi meter: Manometer tubes on tapered wind tunnel tube.
C+25+25 Pitot tube inserted in wind stream with manometer indicator.
C+25+30 Two roof models, hinged, placed in wind stream.
C+25+35 Arc lamp projects fluid flow around various objects.
C+25+40 Water in vertical standpipe with holes at different heights.
C+25+45 Hydraulic ram water pump, working model.
C+25+50 A water vortex in two soda bottles joined vertically.
C+25+55 A vortex tube seperates compressed air into jets of hot and cold air.
Surface Tension and Capillary Action
Set of capillary tubes and dye on video camera.
C+27+05 Various bubble frames.
C+27+10 Soap boat or camphor boats in one meter square pan of water.
C+27+15 Floating needles and pepper on water.
C+27+20 Wire sieve boat floats on water until alcohol is added.
Revolving "drumhead" with manometer shows pressure in water tank.
C+30+05 Magdeburg's hemispheres(cast iron) evacuated, can't be separated.
C+30+10 Hydraulic jack with pressure gauge, breaks 2"x 2" piece of wood.
C+30+15 Archimedes' principle: Cup and plug on balance beam.
C+30+20 Archimedes' principle: Fish submerged in water on balance beam.
C+30+25 Archimedes' principle: Aluminum and brass cylinders.
C+30+30 Film loop: "Archimedes' principle", 3:40 min.
C+30+35 Cartesian divers: Pressure on cap sends divers sinking.
C+30+40 Torricelli Barometer: Column of mercury in bell jar.
C+30+45 Large model of aneroid barometer.
C+30+50 Pascal's vases: Water in removable vases with pressure gauge.
C+30+52 Interconnected set of glass vases of different shapes.
C+30+55 Working model of the lung: Balloons in a bell jar over a diaphragm.
C+30+60 Suction cup holds large mass suspended from heavy glass plate.
C+30+65 Collapse 1 gallon metal can with vacuum pump.
C+30+70 Container of air on a balance in bell jar.
C+30+75 Vacuum hoist, working model.
Heat and Work
Computer Demo: Mechanical equivalent of heat. Copper rope and cylinder with crank. (available w/o Computer)
Ball race: Five different balls heated and placed on paraffin sheet.
Heat of Fusion
Computer demo: Heat of fusion of tin, runs 15 min.
Irreversibility and Fluctuations
Film: "Irreversibility and fluctuations", silent, 7 min.
C+50+05 Black balls and white balls in a box are shaken.
C+50+10 Film loop: "Reversibility of time", 3:40 min.
C+50+15 Film: "Symmetry in physical law" (Feynman), sound, 57 min.
C+50+20 Film: "Distinction of past and future "(Feynman), sound, 46 min.
C+50+25 Film: "Probability and uncertainty "(Feynman), sound, 56 min.
C+50+30 Drum in glycerine rotates to smear line of dye into a plane and back.
Kinetic Theory and Gas Models
Mechanical model of a gas: Vibrating balls on OHP.
C+55+05 Hexstat probability device.
C+55+10 Mechanical model of a gas: Vibrating balls strike piston on OHP.
C+55+15 Brownian motion: Smoke particles viewed using TV camera.
C+55+20 Brownian motion: Like C+55+0, with an aluminum disk added.
C+55+25 Stoekle's apparatus: Heated tube with mercury and glass bits.
C+55+30 Ruchardt's tube: Ball oscillates in a vertical glass tube on jug.
C+55+35 Diffusion of bromine from one glass cylinder into another.
C+55+40 Osmosis of helium through semi-porous cup.
C+55+45 Viscosity of air: One rotating disk drives another.
C+55+50 Film loop: "Random walk and Brownian motion", 3:50 min.
Liquification of a Gas
Hydraulic pump liquifies CO2 gas in glass column.
C+60+05 LN2 demos: Lead bell and spring, color change tube, LN2 cannon.
C+60+10 Film: "Unusual properties of liquid helium", sound, 16 min.
Molecular Models and Crystal Structure
Molecular models, ball and stick.
C+62+05 Film: "Bubble model of a metal", silent, 11 min.
C+62+10 Wave surfaces of crystals.
C+62+15 Model of calcite crystal.
C+62+20 Assorted crystals to show.
C+62+25 Wall chart of periodic table.
Concave mirrors focus candle flame on thermopile across bench.
C+65+05 Computer demo: Kirchhoff's radiation law, runs 15 min.
C+65+10 Large transformer heats metal strip with chalk marks on it.
C+65+15 Crooke's radiometer with flashlight, arc lamp or IR source.
C+65+20 Box with white interior appears black from hole in the side.
Temperature and Expansion
Galileo's air thermometer forces liquid down when heated.
C+70+05 Heated iron wire stretches, rotates pointer.
C+70+06 Heated horizontal nichrome wire stretches, weight sags.
C+70+10 Heated steel rod expands, raises pointer,breaks pin on cooling.
C+70+15 Ring and ball: Ball fits through ring only after ring is heated.
C+70+20 Ice bomb: Iron sphere ruptured by freezing water.
C+70+25 Cubic coefficient of expansion: Dissectable wooden cube.
C+70+30 Steam gun: Friction heated water in tube shoots a cork.
C+70+32 Liquid Nitrogen in a model cannon shoots a cork.
C+70+35 Bimetallic strip: Brass/invar strip curves when heated.
C+70+40 Bimetallic switch: Change in temperature lights cold/hot lamps.
C+70+45 Franklin's pulse glass: Two glass bulbs and tube containing ether.
C+70+47 Dippy bird: Large glass bird containing ether oscillates.
C+70+50 Piston and cylinder compress/expand air measuring temp. and pressure.
C+70+55 Fire syringe: Ether is ignited in a cylinder with a piston.
C+70+60 CO2 fire extinguisher: Expanding gas freezes into snow.
C+70+65 Cooling by expansion: Jar with water compressed with air.
C+70+70 Hot water geyser, runs 5-10 min.
Measurement of temperature: Various types of thermometers.
C+75+05 Transparency: Comparison of Fdeg., Cdeg., and Kdeg. temperature scales.
C+75+10 Transparency: Chronological history of the concepts of heat.
C+75+15 Galileo's air thermometer forces liquid down when heated.
C+75+20 Liquid Crystals: sheet changes colors with body temperature.
Triple Point: Cooled water in sealed cell exhibits all three phases.
C+80+5 Triple Point demo: Water boils under vacuum making ice.
C+80+10 P.V.T. surface model for water.
C+80+15 P.V.T. surface model for carbon dioxide.
C+80+20 Wall chart of isothermals.
Mechanical Properties of Materials
C+90+5 Breaking point of a wire is measured on a spring scale.
C+90+10 Young's modulus of elasticity: Weight stretches wire.
C+90+15 Shear: Stack of masonite squares.
C+90+16 Shear: Foam block.
C+90+20 Viscosity set: Pistons in oil and water-filled glass tubes.
Attraction between horizontal plates of a charged capacitor.
D+0+2 Various capacitors to show.
D+0+04 Parallel plate capacitor with dielectric materials and electroscope.
D+0+06 Capacitor doorbell driven by Van de Graaff generator.
D+0+08 Series capacitor array.
D+0+10 Parallel capacitors array: A charged capacitor charges the others.
D+0+12 Visual charge/discharge of a capacitor through a load.
D+0+14 Computer demo: Charge/discharge of a capacitor, runs 3 min.
D+0+16 Discharging a capacitor through a lamp.
D+0+18 Capacitors with a series neon bulb on A.C. and D.C.
D+0+20 Capacitor in series in an audio circuit: High pass filter.
D+0+22 Effects of changing a D.C. voltage in a series RC circuit.
D+0+24 Capacitor in parallel in an audio circuit: Low pass filter.
D+0+26 Capacitor in parallel in a D.C. circuit.
D+0+28 Energy storage in a commercial capacitor. Loud bang!
D+0+30 Oscillator made with resistor, capacitor and neon lamp.
D+0+32 Same as D+0+30 using speaker for audio tone generation.
D+0+34 Same as D+0+30 using oscilloscope to display waveform.
Resonance in a series LCR circuit using 120 v.a.c.
D+05+02 LCR series resonance curve of V vs. F (2 - 20kHz) on an oscilloscope.
D+05+04 Low frequency filtering using a capacitor and inductor.
D+05+06 Crystal radio circuit for AM reception.
D+05+08 Damped oscillations in a resonant LCR circuit on an oscilloscope.
D+05+10 85 MHz radio transmitter, with indicating lamp on dipole antenna.
D+05+12 Seibt effect: Wire wound glass tube with D+5+10 transmitter.
D+05+14 Standing waves on two parallel wires, with D+5+10 transmitter.
D+05+16 Lodge's experiment: Spark gap radio transmitter and receiver.
D+05+18 3 cm. u-wave klystron oscillator with cavity and waveguides.
D+05+19 3 cm. u-wave transmitter and receiver.
D+05+20 10 cm. u-wave transmitter and receiver.
D+05+22 Magnetron assembly to show.
D+05+24 Waveguide pieces to show.
D+05+26 Standing waves (micro or sound) in an adjustable cavity.
D+05+28 AM and FM Demonstration(minimum 24 hr notice required).
D+05+30 Wall chart of electromagnetic spectrum.
D+05+32 Plexiglas model of electromagnetic wave.
Electric fields: Lines of force shown on an OHP.
D+10+02 Transparency: Mapping of an electric field.
D+10+04 Pith balls on thread, with positive and negative charged rods.
D+10+06 Attraction and repulsion of charged styrofoam balls.
D+10+08 Braun and Leaf electroscopes.
D+10+10 Faraday's ice pail: Charge induced on the outside of a pail.
D+10+12 Charge resides on the outside of a conductor.
D+10+13 Faraday cage : Enclosed electroscope shows no charge.
D+10+14 Charging an electroscope by induction.
D+10+16 Separation of charge using electrical tape and an electroscope.
D+10+18 Electrophorous: Cat fur on teflon, acetate on lucite.
D+10+20 Van de Graaff generator.
D+10+22 Wimshurst machine, large or small.
D+10+24 Electrostatic pinwheel:Van de Graaff makes pinwheel spin.
D+10+26 Various Leyden jars to show.
D+10+28 Electrostatic doorbell: Ball bangs between charged plates.
D+10+30 Kelvin water drop electrostatic charge generator.
Bar magnet induces current in a coil, shown on galvanometer.
D+15+02 Elementary generator: Bar moved in magnetic field.
D+15+04 Earth inductor: Coil spun in Earth's field makes voltage.
D+15+06 Generator: Coil with DC commutator rotates between magnets.
D+15+08 Alternator: Coil with AC commutator rotates between magnets.
D+15+10 Hand-cranked generator powers 12 volt lamp.
D+15+12 Back EMF in a series DC motor with large flywheel.
D+15+14 Eddy currents: Copper disk rotates over a spinning bar magnet.
D+15+16 Damped pendulum: Swinging metal disks damped in magnetic field.
D+15+18 Faraday's disk: Copper disk in Hg rotates in magnetic field.
D+15+20 Jumping rings: High current AC coil causes rings to jump.
D+15+22 Skin effect: Metal sheet shielding varies with frequency.
D+15+24 Levitator: Aluminum dish floats four inches off platform.
D+15+26 Eddy currents:Small magnet slowly drops between aluminum rails.
Energy stored in large coil with soft iron core flashes bulb.
D+20+02 LR time constant: Square wave drives series LR on oscilloscope.
D+20+04 AC dimmer: Soft iron core in coil dims lamps.
LCR Phase Relationships
Phases of V and I in series circuit as RL shifts to RC.
Suspended magnetic lodestone on string.
D+30+01 Large compass needle on stand.
D+30+02 Dip needle compass.
D+30+04 Earth model with internal magnet and pivoting probe magnet.
D+30+06 Iron filings and permanent magnets to show field on an OHP.
D+30+08 Compass needle shows field around a high current wire on bench top.
D+30+10 Iron filings around a high current vertical wire on OHP to show field.
D+30+12 Iron filings around a current carrying coil on OHP to show field.
D+30+14 Magnetic field around a solenoid with pivoting probe magnet.
D+30+16 Ampere's law: Currents in parallel wires attract or repel.
D+30+18 Force on a current carrying wire in a magnetic field.
D+30+20 Elementary motor: Bar on rails over solenoid with core.
D+30+22 Torque on coil suspended between two magnets.
D+30+24 Vacuum tube with screen shows cathode rays bent with a magnet.
D+30+26 E/M tube: Circular bending of an electron beam in a magnetic field.
D+30+28 Hall effect: Magnetic field induces a voltage in a neon plasma.
Wobbly bar: Magnets in frame balanced by repulsive forces.
D+35+2 Making a magnet by electromagnetic induction.
D+35+4 Making small magnets by breaking up a larger magnet.
D+35+6 Barkhausen effect: Magnet and coil with soft iron core.
D+35+7 Barkhausen effect model: Many tiny magnets on pivots on OHP.
D+35+8 Film: Ferromagnetic domains: silent, 20 min.
D+35+9 Para and diamagnetic materials in magnetic field with OHP.
D+35+10 Para and diamagnetic materials in magnetic field with arc lamp.
D+35+12 Linear motor: An iron core jumps into a solenoid.
Tangent galvanometer: Compass needle pivots in a coil.
D+40+2 Elementary galvanometer: Coil on spring in magnetic field.
D+40+4 Mavometer: Ammeter/voltmeter/galvanometer.
D+40+6 Various meters for display.
D+40+8 Ammeter shunt: Only a small current flows to the meter.
Rolling bar motor: Same as
D+45+2 Elementary split-ring armature DC motor. D+15+6 as a motor.
D+45+4 AC induction motor: Armature in a whirling field.
D+45+6 Elementary motor: Electron beam revolves in magnetic field.
The Braun tube with magnetic and electrostatic deflection.
Resistance boards: Series, parallel, Wheatstone bridge.
D+55+2 Watt's law: Variable resistor, glow coil, volt and amp meter.
D+55+4 High current melts the fuse wire.
D+55+6 Resistance thermometer: Iron coil in Liquid Nitrogen and flame varies current.
D+55+8 Effect of temperature on current in carbon or tungsten filaments.
D+55+10 Large tungsten filament lamp, as it heats, current drops.
D+55+12 Oscillator with resistor, capacitor and neon lamp.
D+55+13 Same as D+55+12 using speaker for audio tone generation.
D+55+14 Same as D+55+12 using oscilloscope to display waveform.
D+55+16 Film: "Elementary electricity", sound; 8 min.
Solid State and Semiconductors
P-N Junction as a rectifier: Current flows one way.
D+60+2 P-N Junction as a rectifier: Diode bridge rectifies AC voltage.
D+60+4 Photoelectric effect: Light on P-N junction causes current flow.
D+60+6 Several commercial solar cells.
D+60+8 Solar energy cube: Solar cells spin propeller using arc lamp.
D+60+10 Impact on peizo-electric device flashes neon bulb.
Edison effect: Electrons are cast off from hot filament.
Thermocouple and thermopile, both make electricity from heat.
D+70+2 Thermocouple magnet: Flame with water cooling holds weight.
D+70+4 Thermocouple magnet: Flame with ice bath, holds weight.
D+70+6 Thermoelectric fan: Fan runs off of hot and cold water.
D+70+8 Peltier junction: Foreward current freezes water drop, reverse boils.
Demountable transformer with many secondary coils from 10:1 to 1:46.
D+75+1 Same as above: Secondary used for spot-welding.
D+75+2 Same as above: Secondary used for induction melting.
D+75+3 Same as above: Secondary used for small Jacob's ladder.
D+75+4 Large Tesla coil. 15 inch discharge.
D+75+6 Automobile coil makes a spark.
D+75+8 Large Jacob's ladder.
Copper nail and iron nail in a lemon using a multimeter.
D+80+2 Voltaic pile: Alternating metal sheets in NaCl solution.
D+80+4 Gotham cell: Assorted metal electrodes in sulfuric acid bath.
D+80+6 Storage cell: Gotham cell is charged up and rings a bell.
Standard color blindness tests and box of colored yarns.
E+5+5 Red, green, blue light on three-sided rotatable pyramid.
E+5+10 Newton's color disk: When rotated,appears white.
E+5+15 Three-color projector for additive color mixing with arc lamp.
E+5+20 Arc light spectrum recombined with concave mirror on lucite rod.
E+5+25 Cyan, magenta, and yellow filters mix subtractively on OHP.
E+5+30 Arc light spectrum with various filters.
E+5+35 Rotating disk with black and white lines makes color illusion.
E+5+40 Purkinje effect: At low intensity, blue is more visible than red.
E+5+45 Two slides plus red and green light gives full color illusion.
Single slit diffraction using laser beam through adjustable slit.
E+10+5 Cornell slitfilm: Laser beam through various slits.
E+10+10 Airey's disk: Pinhole diffraction using laser beam.
E+10+15 Diffraction about pinhead, razorblade, wood screw using laser.
E+10+20 Microwave diffraction by a large adjustable iris.
E+10+25 Microwave and acoustical zone plates.
E+10+30 Bragg diffraction using Microwaves and steel balls in foam cube.
E+10+40 Two points of light diffract through an iris,shown on T.V. camera.
E+10+45 Limit of resolution: Two small lamps on adjustable slide.
E+10+50 Poisson's spot: Interference pattern within circular shadow
Gratings and Spectra
First and second order transmission gratings, with arc lamp.
E+15+1 Reflection grating with arc lamp.
E+15+5 Arc lamp spectra from NaCl, CaCl2, SrCl soaked rods.
E+15+10 Mercury spectrum using slit and grating, includes UV lines.
E+15+12 Wall chart of mercury spectrum.
E+15+15 Absorption spectrum of Na using arc lamp, slit and grating.
E+15+20 Diffraction patterns of various gratings using He-Ne laser.
E+15+25 Hand-held gratings for class to view Hg, Ne discharge tubes.
Films: "Laser light", U of Utah, sound, 38 min.; "Introduction to Holography", Ext. media center,sound, 17 min.; "Introduction to Lasers", Ext. media center, sound, 17 min.
E+20+5 Transmission hologram viewed with laser light.
E+20+6 Reflection hologram viewed with white light.
Large wood model of a double slit with hinged waves.
E+25+5 Ripple tank with plane or spherical water waves and barriers.
E+25+10 Microwave interference with single and double slits.
E+25+15 Cornell slitfilm: Laser beam through various slits.
E+25+20 Red/green/blue line source viewed with double slit paddles.
E+25+25 Thin film interference with optical flats and sodium lamp.
E+25+30 Newton's rings by transmission or reflection on arc bench.
E+25+35 Same as E+25+30, using Hall's prism.
E+25+40 Soap film interference: The soap bubble experiment on arc bench.
E+25+45 Thin film interference with mercury light on mica sheets.
E+25+50 Fabry-Perot interferometer with cadmium light on T.V. camera.
E+25+55 Lloyd's mirror: Laser beam reflected from black-glass mirror.
E+25+60 Michelson interferometer fringes with laser or white light.
E+25+65 Microwave interference by multiple reflection.
Air, glass and water lenses in water tank with arc lamp.
E+30+10 Blackboard optics: Light sources with lucite lenses.
E+30+15 Real images: Lighted arrow image and various lenses.
E+30+20 Cylindrical lens of lucite with words "DIOXIDE GLASS".
E+30+25 Fresnel lenses to show.
E+30+30 Large lens shows chromatic aberration on screen using arc lamp.
E+30+35 Pincushion and barrel distortion of lenses using arc lamp.
E+30+40 Cylindrical aberration: Wooden model.
E+30+45 Astronomical telescope: Using objective and eyepiece lenses.
E+30+50 Galilean telescope: similar to E+30+45.
E+30+55 Compound microscope is assembled from lenses.
E+30+60 Lantern slide projector with removable housing.
E+30+65 Model of the eye, with near/far sight lenses, using arc lamp.
Color by reflected and transmitted light, using gold leaf.
Arc lamp and mirror on large disk rotate showing beam angles.
E+40+5 Blackboard optics: Light sources with plane and curved mirrors.
E+40+10 Phantom lightbulb: Image in a plane mirror.
E+40+15 Hand held plane mirror and right angle mirror.
E+40+20 Variable angle mirror assembly with candle.
E+40+21 Barbershop mirrors:Parallel mirrors with light bulb.
E+40+25 Retrodirective reflector: Silvered right angle prism, using laser.
E+40+30 Reflections from concave and convex mirrors with light bulb.
E+40+35 Phantom bouquet: Real image from a concave mirror.
E+40+40 Clam shell mirrors: Floating coin illusion.
Polarization and Birefringence
Two picket fence sections with slats and rope to make waves.
E+45+5 Microwaves with grid. Transmitter and receiver are polarized.
E+45+10 Malus experiment: Polarization by reflection off glass surface.
E+45+15 Polarization of light by internal reflection: Fresnel rhomb.
E+45+20 Polarization of light through a pile of glass plates using arc lamp.
E+45+25 Commercial Polaroid filters on an OHP.
E+45+30 Plaster models of positive and biaxial crystals.
E+45+35 Two tourmaline crystals used as polaroids using arc lamp.
E+45+40 Light through polaroid and calcite using arc lamp.
E+45+45 Model of a calcite crystal.
E+45+50 Light through Nicol prism and Nicol analyzer using arc lamp.
E+45+55 Quartz prisms give a single and double spectrum using arc lamp.
E+45+60 Polarized light and stressed lucite on an OHP.
E+45+65 Optical rotation of polarized light by sugar solution using arc lamp.
E+45+70 Optical rotation by sugar solution produces barber pole using arc lamp.
E+45+75 Mechanical model to show circular polarization; hand-cranked.
E+45+80 Circular polarization with quarter wave plate using arc lamp.
E+45+85 Circular polarization of Microwaves by elliptical metal tube.
E+45+90 Circular polarization of Microwaves: With reflector and grids.
E+45+95 Polarized light thru Karo syrup shows dark bands using arc lamp.
E+45+100 10 lambda retarder plate makes dark bands in spectrum using arc lamp.
E+45+105 Sunset: solution in tank scatters blue light using arc lamp.
E+45+110 Visible nodes and antinodes in linearly birefringent plexiglass rod.
Total internal reflection: 45deg.-45deg.-90deg. prism using arc lamp.
E+50+5 Four-prisms, same index of refraction, different angles, using laser.
E+50+10 Eight-prisms, different index of refraction, same angle, using laser.
E+50+15 Blackboard optics: Light source and lucite prism.
E+50+20 Refraction of white light by prism using arc lamp.
E+50+25 Light from arc lamp enters direct view prism emerges as spectrum.
E+50+30 Dove prism to erect projected images using arc lamp.
E+50+35 Binoculars and Porro prisms to show.
Propagation of Light
Inverse square law: Light bulb in wire frame.
E+55+5 He-Ne laser compared to non-coherent red light bulb.
E+55+10 Image formed by a pinhole using three light bulbs in a box.
Refraction and Reflection
Displacement of a beam passing through a thick plate of glass.
E+60+5 Total internal reflection/critical angle: Nakamura water tank.
E+60+10 Rainbow: Refraction of white light by a liquid sphere.
E+60+15 Light pipes and fiber optic flashlight.
E+60+20 Flexible light pipe using arc lamp.
E+60+25 Microwave analogy of the light pipe using flexible metal tubing.
E+60+30 Reflection of microwaves off an aluminum plate.
Crooke's radiometer with flashlight or IR source.
E+65+10 Detection of the IR, visible, and UV spectra using arc lamp.
E+65+15 Concave mirrors and horn thermopile senses candle across room.
E+65+20 Measurement of light intensity: Footcandle meter.
E+65+25 As light bulb filament increases temp. its spectrum shifts red to blue.
Vacuum tube with screen show cathode rays bent with a magnet.
F+0+5 Vacuum tube with metal cross makes shadow with cathode rays.
F+0+10 Vacuum tube with paddlewheel spins from cathode ray impact.
F+0+15 Braun tube (CRT) with magnetic and electrostatic deflection.
X-Ray tube: Hard X-rays detected by fluorescent screen.
F+5+5 X-rays ionize electrode and discharge electroscope.
F+5+10 X-ray beam through cloud chamber shown on TV camera
F+5+15 Bragg diffraction using Microwaves and steel balls in foam cube.
Electron diffraction by aluminum and graphite on CRT.
F+10+5 Film: "Matter Waves", sound, 28 min.
UV light hits charged zinc plate and discharges electroscope.
F+15+5 Light through different filters into phototube changes current.
F+15+10 Phototube circuit allows current flow in one direction only.
F+15+15 EMF generated by phototube using small arc lamp.
F+15+20 Commercial solar cell spins propeller using small arc lamp.
F+15+25 Light hits diode,causes current flow. Uses arc lamp.
F+15+30 NPN junction as a phototransistor amplifier.
F+15+35 Recording modulates laser beam which hits solar cell and amplifier.
F+15+40 Film loop: "Photoelectric effect", 4:02 min.
Film: "Photons", sound, 19 min..
F+18+5 Film: "Interference of photons", sound 13 min.
F+18+10 Photomultiplier tubes to show.
Photomultiplier tube is used to detect photons.
F+20+0 "Plum pudding": Corks with magnets float in bowl/solenoid on OHP.
F+20+5 Rutherford scattering model: Steel balls, launcher, and "hill".
F+20+10 Model of the nucleus: Steel balls in plastic dish on OHP.
F+20+15 Film: "Rutherford atom", sound, 40 min.
F+20+20 Mechanical models of the hydrogen atom.
F+20+25 Bohr-Stoner charts(5): Electron configurations of the elements.
Film loop: "Scattering in one dimension-barriers", 3:00 min.
F+25+1 Film loop: "Scattering in one dimension-square wells", 2:40 min.
F+25+2 Film loop: "Scattering in one dimension-edge effects", 4:00 min.
F+25+3 Film loop: "Scattering in one dimension-momentum space", 3:00 min.
F+25+4 Film loop: "Free wave packets", 2:15 min.
F+25+5 Film loop: "Particle in a box", 2:40 min.
F+25+10 Film: "Scattering of quantum mechanical wave packets from potential well and barrier", silent, 5 min.
Quantum Mechanical Barrier Penetration
Tunneling:Microwave analogy using wax prisms.
Fundamental particle and interaction chart.(LBL)
Expansion cloud chamber with water and compression bulb.
F+45+5 Wilson cloud chamber, piston compression type.
F+45+10 Cloud chamber with dry ice and alcohol shown on TV camera.
F+45+15 Cloud chamber shows X-rays: Same as F+5+10.
Range of Alpha Particles
Alpha range measured using small cloud chamber.
Film: "Franck-Hertz experiment", sound, 30 min.
F+55+05 Franck-Hertz experiment: menchanical energy in atoms is quantized.
Film: "Relativistic time dilation", sound 12 min..
Scintillation counter using Geiger tube.
F+65+05 Geiger counter.
F+65+10 Mechanical model of radioactive decay.
F+65+15 Wall chart of the nuclides.
F+65+20 Film loop: "Radioactivity", 4:00 min.
F+65+25 Film loop: "Radioactive decay", 4:55 min.
F+65+30 Computer demo: Neutron activation of silver, runs 5 min.
Large mechanical model of the cyclotron.
Fission and Fusion
Mousetrap chain reaction experiment.
F+80+05 Model of the uranium pile.
YBaCuO pellet with magnet in liquid nitrogen on TV camera.
A magnetic field applied to a cadmium tube splits the spectral lines.
Working helium-neon laser displayed in a clear plexiglas mounting.
35mm slides for astronomy.
Vault of the heavens: Large lucite globe.
G+05+05 Earth, Sun, and Mars model.
G+05+10 Solar system model.
Shepard Tones: Illusion of continual rising or falling tones.
Revolving window illusion.
G+55+05 Rotating disk and strobe demonstration.
G+55+10 Optical illusion posters.
G+55+15 Phantom Bouquet: Real image from a concave mirror.
G+55+20 Clam shell mirrors: Floating coin illusion.
Pulfrich Effect: Pendulum and polaroid experiment.
G+60+10 Limit of resolution: Two movable pin-points of light.
G+60+15 Limit of audibility: Set of rods that ring at different frequencies.
G+60+20 Set of color blindness cards.
G+60+25 Rotating disk with black and white lines makes color illusion.
G+60+30 Purkinje effect: At low intensity, blue is more visible than red.
G+60+35 Two sides plus red and green gives full color illusion.
G+60+40 Limits of visibility: the visible spectrum, infrared and ultraviolet.
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