PIRA 200

PIRA 200


DCS #DemonstrationAbstract
1A10.20standards of massShow students 1 lb, 1 kg, 1 slug masses.
1A10.35meter stickSet out a standard meter.
1A40.10components of a vectorArrows define a three dimensional coordinate system. An arbitrary vector is viewed in the three planes.
1A50.10radian discA flexible strip of plastic equal to the radius is bent around the edge of a circle.
1A60.10Powers of Ten"Powers of Ten" is a film covering scales from the universe to sub-atomic.
1C10.10bulldozer on moving sheet/2DA bulldozer runs at constant speed on a moving paper to show how velocities add and subtract.
1C20.10penny and featherDrop a penny and feather in a glass tube, first full of air and then evacuated.
1C30.10free fall timerA ball is timed as it drops .5m, 1m, 1.5m, or 2m.
1D15.10ultrasonic detector and studentsHave a student walk to and from a sonic ranger while observing plots of position, velocity, and acc.
1D40.10throw objectsA light disc contains a heavy slug that can be shifted from the center to side. Mark the center of mass.
1D50.10ball on a stringTie a lightweight ball to a sting and twirl around in a vertical circle.
1D50.40pail of waterSwing a bucket of water in a verticle circle over your head.
1D60.10howitzer and tunnelA ball fired vertically from cart moving horizontally falls back into the muzzle.
1D60.20simultaneous fallTwo balls simultaneously dropped and projected horizontally hit the floor together.
1D60.30monkey and hunterA gun shoots at a target, released when the gun is fired. The ball hits the target in midair.
1F20.10inertia ballsBreak the string on the top or bottom of a suspended mass.
1F30.10persistence of motion (air track)A single cart on the air track.
1G10.40Atwood's machineTwo equal masses are hung from a light pulley. A small percentage of one mass is moved to the other side.
1H10.10push me pull me cartsTwo people stand on roller carts and both pull on a rope or push with a long stick.
1H11.20tennis ball cannonA cannon on wheels shoots a tennis ball.
1J10.10map of stateSuspend a map of the state from holes drilled at large cities to find the "center of the state".
1J11.20leaning tower of LireStack blocks stairstep fashion until the top block sticks out beyond any part of the bottom block.
1J30.10suspended blockForces parallel and perpendicular to the plane will support the car midair when the plane is removed.
1J30.25rope and three studentsTwo large strong students pull on the ends of a rope and a small student pushes down in the middle.
1J40.10grip barA thin rod mounted perpendicular to a broom handle holds a 1 Kg mass on a sliding collar.
1J40.20meter stick balanceHang weights from a beam that pivots in the center on a knife edge.
1K10.20ladder against a wallSet a model ladder against a box and move a weight up a rung at a time.
1K10.30walking the spoolPull at various angles on the cord wrapped around the hub of a spool to move the spool forward or back.
1K20.10friction blocks - surface materialPull a block with four different surfaces with a spring scale.
1K20.30static vs. sliding frictionUse a spring scale and block to show that static friction is greater than sliding friction .
1K30.10bed of nailsLie down on a bed of 16d nails on 1" centers.
1L10.10Cavendish balance film loopTime lapse of the Cavendish experiment.
1M10.20pile driverDrive a nail into a block of wood with a model pile driver.
1M40.10nose basherA bowling ball pendulum is held against the nose and allowed to swing out and back.
1M40.15stopped pendulumA pendulum started at the height of a reference line reaches the same height when a stop is inserted.
1M40.20loop the loopA ball rools down an incline and then around a vertical circle.
1N10.20egg in sheetThrow an egg into a sheet held by two students.
1N20.20sprring apart air track glidersBurn a string holding a compressed spring between two air gliders.
1N22.10fire extinguisher wagonMount a fire extinguisher on a cart and take a ride.
1N22.20water rocketPump a toy water rocket the same number of times, first with only air, and then with water.
1N30.10collision ballsTwo balls or many balls on bifilar suspension.
1Q10.10inertia wands and two studentsStudents twirl equal mass wands, one with the mass at the ends and the other with the mass at the middle.
1Q10.30ring, disc, and sphereA ring, disc, and sphere of the same diameter are rolled down an incline.
1Q20.10whirlybird (adj. ang. mom.)A weight on a string wrapped around a wheel drives a radial rod with adjustable weights.
1Q30.10passing the wheelPass a bicycle wheel back and forth to a person on a rotating stool.
1Q40.10rotating stool and weightsSpin on a rotating stool with a dumbell in each hand.
1Q40.30rotating stool and bicycle wheelInvert a spinning bike wheel while sitting on a rotating stool.
1Q50.10precessing discSpin a cardboard disc on a pencil inserted in a hole at the center and touch a finger to the rim.
1Q50.20bicycle wheel gyroSpin a bicycle wheel mounted on a long axle with adjustable counterbalance.
1Q60.10bicycle wheel topExtend the axle of a weighted bike wheel and terminate with a rubber ball.
1R10.10stretching a springAdd masses to a pan balance and measure the deflection with a cathetometer.
1R20.10breaking wireAdd weights to baling wire attached to the ceiling until the wire breaks.
1R40.30dead and live ballsDrop bounce and no-bounce balls.
2A10.20floating metalsFloat needles, paperclips, rings of wire, etc. on water.
2A15.10ring and threadA loop of thread in the middle of a soap film forms a circle when the center is popped.
2B20.10pressure independent of directionInsert a rotatable thistle tube with a membrane into a beaker of water.
2B20.40Pascal's vasesSix tubes of various shapes are connected to a common water reservoir.
2B30.10crush the canBoil water in a can and cap. As the vapor pressure is reduced by cooling, the can collapses.
2B30.30Magdeburg hemispheresEvacuate Magdeburg hemispheres and try to separate them.
2B40.10weigh submerged blockLower a 3 Kg block of aluminum suspended from a spring scale into water and note the new weight.
2B40.20Archimedes' principleSuspend a pail and weight from a spring scale, lower the weight into water, collect the overflow, pour it into the pail.
2B40.30Cartesian diverPush on a diaphram at the top of a large graduate or squeeze a stoppered whisky flask to make the diver sink.
2C20.30floating ballA ball is suspended in an upward jet of air.
2C20.35funnel and ballSupport a ping pong ball by air or water streaming out of an upside-down funnel.
2C20.40lifting plateAir blows radially out between two plates, supporting weights hung from the bottom plate.
2C20.60curve ballUse a "V" shaped launcher to throw curve balls.
2C50.10smoke ringTap smoke rings out of a coffee can through a 1" dia. hole.
3A10.10simple pendulumSuspend a simple pendulum from a ringstand.
3A15.10physical pendulumAny distributed mass pendulum.
3A20.10mass on a springA mass oscillates slowly on a large spring.
3A20.30air track glider and springAn air cart is attached to a single horizontal coil spring.
3A40.10circular motion vs. mass on a aspringShadow project a ball at the edge of a disc rotating at the same frequency as a mass on a spring.
3A40.20circular motion vs. pendulumShadow project a pendulum and turntable which have identical frequencies.
3A60.10Tacoma Narrows filmA film of the collapse of the bridge due to resonance.
3A70.10Wilberforce pendulumEnergy transfers between vertical and torsional modes.
3A70.20coupled pendulaHang two or three pendula from a flexible metal frame.
3B10.10pulse on a ropeGive a heavy peice of stretched rope a quick pulse.
3B10.30Shive (Bell Labs) wave modelExcite a horizontal torsional wave machine by hand. The other end is open, clamped, or critically damped.
3B20.10hanging slinkyA long slinky is supported on bifilar suspension every four inches.
3B22.10Melde's vibrating stringDrive one end of a string over a pulley to a mass with variable frequency SHM
3B30.30bell in a vacuumPump air from a bell jar as a battery powered bell rings inside.
3B40.10doppler buzzerSwing a battery powered buzzer on a string around in a horizontal circle.
3B45.10ripple tank film loopsA 3:45 film loop shows doppler effect and shock waves.
3B50.40Moire pattern transparenciesA double slit representation of Moire patterns from two sheets of semicircular ruled transparencies.
3B55.10two speaker barTwo speakers driven from a common source are mounted at the ends of a long bar.
3B55.40trombone / Quinckes' tubeA speaker drives two tubes, one variable , that come together into a common horn.
3B60.10beat forksTwo tuning forks differing by about 1 Hz are mounted on resonance boxes.
3B60.20beats on scopeTwo audio transformers are fed thru an audio interstage transformer to an oscilloscope and audio amp.
3B70.10coupled tuning forksTwo matched tuning forks are mounted on resonance boxes. Hit one and the other vibrates too.
3B70.20coupled speaker/tuning forksDrive a tuning fork on a resonant box with a speaker.
3C20.10range of hearingUse an oscillator driving a good audio system to demonstrate the range of hearing.
3C50.10Pasco Fourier synthesizerThe Pasco Fourier synthesizer allows one to build an arbitrary waveform with up to nine harmonics.
3C50.30Helmholtz resonators and microphoneHold a small microphone individually to a set of Helmholtz resonators.
3D20.10sonometerA sounding box with strings, tuning machines, and adjustable bridges.
3D30.10vertical resonance tubeDraw a glass tube out of a water bath while holding a tuning fork over one end.
3D30.70hoot tubesA bunsen burner heats a screen in the bottom of a large open vertical tube.
3D40.20singing rodHold a long aluminum rod at the midpoint and stroke with rosened fingers.
3D40.30Chladni plateStrike or bow a horizontal metal plate covered with sand while touching the edge at various nodal points.
4A30.10bimetal stripStrips of dissimilar metals bonded together bend when heated.
4A30.20balls and ringA ring with a set of two balls, one over and one under size. Heat the ring and lslip over both.
4A40.10lead bell, solder springRing a lead bell after it is frozen in liquid nitrogen, Cool a coil of solder to make a spring.
4A40.30smashing rose and tubeCool a rose, urffer tube, or handball in a clear dewar of liquid nitrogen and smash it.
4B20.10convection tubeHeat one side of a glass tube loop filled with water and insert some ink.
4B40.10light the matchLight a match at the focus of one parabolic reflector with a heating element at the focus of another reflector.
4B50.20boiling water in a paper cupBurn one paper cup, boil water in another.
4B60.10dropping lead shotDrop a bag of lead shot is dropped several times and measure the temperature rise.
4C30.10boiling by coolingCool a flask stoppered flask filled with warm water with ice until boiling starts.
4C31.30drinking birdCooling causes vapor to condense, lowering the center of gravity until the bird tips, raising the c. of g.
4D10.10Brownian motion cellView a smoke cell under a microscope.
4D20.10Crookes' radiometerThe fake radiometer is evacuated until the mean free path is about the dimension of the system.
4E10.20balloons in liquid nitrogenPour liquid nitrogen over an air filled balloon until it collapses and then let it warm up again.
4E30.10constant volume bulbImmersed a bulb with an absolute pressure gauge in boiling water, ice water, and liquid nitrogen.
4F30.10Stirling engineShow both a working stirling engine and a cutaway model.
5A10.10rods, fur, and silkPVC rod and felt, acrylic rod and cellophane, with the Braun electroscope as a charge indicator
5A20.10rods and pivotWith one charged rod on a pivot, use another of the same or opposite charge to show attraction or repulsion.
5A20.20pith ballsSuspend two small pith balls and show either attraction or repulsion.
5A40.10charging by inductionCharging by induction using two balls on stands with an electroscope for a charge indicator.
5A40.20can attracted to charged rodA hoop of light aluminum is attracted to a charged rod.
5A50.10Wimshurst machineCrank a Wimshurst generator.
5A50.30Van de Graaff generatorShow sparks from a Van de Graaff generator to a nearby grounded ball.
5B10.10hair on endWhile standing on an insulated stool, charge yourself up with a Van de Graaff generator.
5B10.25confetti (puffed wheat)Confetti (puffed wheat, styrofoam peanuts) flies off the ball of an electrostatic generator.
5B20.10Faraday's ice pailWith a proof plane and electroscope, show charge is on the outside of a hollow conductor.
5B20.35radio in a cagePlace a wire mesh cage over a radio.
5B30.30lightning rodInsert a sphere and point of the same height between horizontal metal plates charged by a Wimshurst.
5C10.20parallel plate capacitorChange the spacing of a charged parallel plate capacitor while it is attached to an electroscope.
5C20.10capacitor with dielectricsInsert and remove a dielectric from a charged parallel plate capacitor while it is attached to an electroscope.
5C20.30dissectible condenserA capacitor is charged, disassembled, passed around, assembled, and discharged with a spark.
5C30.20short a capacitorCharge a large electrolytic (5000 mfd) capacitor to 120 V and short with a screwdriver.
5C30.30light a bulb with a capacitorCharge a large electroylitic capacitor and connect it to a lamp.
5D20.10wire coil in liquid nitrogenA lamp glows brighter when a series resistance coil is immersed in liquid nitrogen.
5D20.20iron wire in flameHeat a coil of iron wire in series with a battery and a lamp and the lamp will dim.
5D40.10Jacob's ladderA arc rises between rabbit ear electrodes attached to a high voltage transformer.
5E50.10thermocoupleTwo iron-copper junctions, one in ice and the other in a flame, are connected to a galvanometer.
5F10.10Ohm's lawMeasure current and voltage in a simple circuit. Change the voltage or resistance.
5F20.10Kirchoff's voltage lawMeasure the voltages around a three resistor and battery circuit.
5F20.50series and parallel light bulbsA light bulb board with switches allows configuration of several combinations of series and parallel lamps.
5F30.10capacitor and light bulbA large lelectrolytic capacitor, a light bulb, and a 120 V dc supply in series show a long time constant.
5G20.30magnetic domain modelAn array of small compass needles shows domain structures.
5G50.50Meissner effectCool a superconductor and a magnet floats over it due to magnetic repulsion.
5H10.20Oersted's effectExplore the field around a long wire with a compass needle.
5H10.30magnet and iron filingsSprinkle iron filings on a glass sheet placed on top of a bar magnet.
5H15.10iron filings around a wireIron filings are sprinkled around a vertical wire running through the denter of a pexiglass sheet.
5H15.40solenoid and iron filingsA solenoid is wound through a peice of plexiglass for use with iron filings on the overhead projector.
5H15.50field of a toroidIron filings show the field of a toroid which is wound through a sheet of plexiglass.
5H20.10magnets on a pivotOne magnet is placed on a pivot, the other is used to attract or repel the first.
5H30.10cathode ray tubeDeflect the beam in an open CRT with a magnet.
5H30.20e/m tubeShow the beam of the small e/m tube in Helmholtz coils on tv. A hand held magnet gives a corkscrew.
5H40.10parallel wiresLong vertical parallel wires attract or repel depending on the current direction.
5H40.15interacting coilsTwo hanging loops attract or repel depending on current direction.
5H40.30jumping wireA wire is placed in a horseshoe magnet and connected to a battery. The wire jumps out of the magnet.
5J20.10RL time constant on scopeShow the RL time constant on a scope.
5J20.20lamps in series or parallel with ind.Hook light bulbs in series with a large electromagnet.
5K10.20induction coil with magnet, galv.A magnet is moved in and out of a coil of wire attached to a galvanometer.
5K10.30induction with coils and batteryAttach one coil to a galvanometer, another to a battery and tap switch. Use a core to increase coupling.
5K20.10Eddy currents in pendulumA copper sheet and comb, ring and broken ring are swung through a large electromagnet.
5K20.25magnets in Eddy tubesDrop a magnet and a dummy in glass and aluminum tubes, then switch. The magnet in Al falls slowly.
5K20.30jumping ringA solid aluminum ring on the vertical transformer jumps while a split ring does not.
5K40.40motor/generatorA large AC/DC motor/generator has both slip and split rings.
5K40.80hand crank generatorUse a hand cranked generator to light an ordinary light bulb.
5M10.10Hall voltageMeasure the transverse potential of a large rectangle of biased N-doped germanium in a magnetic field.
5N20.10induction coilThe small handheld induction coil.
5N20.25hand held Tesla and lampLight a fluorescent lamp by touching with a hand held tesla coil.
5N20.80Tesla coil and pinwheelPlace a pinwheel on the secondary of a tesla coil.
5N30.10project the spectrumProject white light through a high dispersion prism.
6A01.10speed of lightDemonstrate speed of light by the path difference method with a fast pulser and fast oscilloscope.
6A42.20refraction tankRotate a beam of light in a tank of water containing some fluorescein.
6A44.10blackboard opticsMultiple beams of light pass through large scale optical elements.
6A44.40laser and fiber opticsShine a laser into a curved plastic rod.
6A44.50light below surfaceAn underwater light illuminates powder on the surface of water to form a central spot of light.
6A60.30thin lens projectionProject the filament of a lamp with a thin lens.
6B10.15inverse square modelA wire frame pyramid connects areas of 1, 4, and 16 units.
6B40.10variac and light bulbVary the voltage to a 1 KW light bulb with a variac to show color change with temperature.
6C10.10single slit and laserShine a laser beam through single slits of various sizes.
6C10.15adjustable slit and laserShine a laser beam through an adjustable slit.
6C20.10Arago's (Poisson's) spotShine a laser beam at a small ball and look at the diffraction pattern.
6D10.10double slit and laserShine a laser beam through double slits of different widths and spacing.
6D20.10number of slitsShine a laser beam through various numbers of slits with the same spacing.
6D30.10Newton's ringsReflect white light off Newton's rings onto the wall.
6D30.20soap film interferenceReflect white light off a soap film onto a screen.
6D40.10Michelson interferometerUse a Michelson interferometer with either laser or white light.
6F40.10sunsetPass abeam of white light through a tank of water with scattering centers from a solution of oil in alcohol.
6H10.10polaroids on the overheadShow polarization with two sheets of polaroid and a pair of sunglasses on an overhead projector.
6H10.20microwave polarizationHold a grid of parallel wires in a microwave beam and rotate the grid.
6H20.10Brewster's angleRotate a polariod filter in a beam that reflects at Brewster's angle off a glass onto a screen.
6H30.40Karo syrupInsert a tube of liquid sugar between crossed polaroids.
6H35.10two calcite crystalsUse a second calcite crystal to show the polarization of the ordinary and extraordinary rays.
6H35.50stress plasticA set of plastic shapes are bent between crossed polariods.
6Q10.10hologramsShow a hologram.
7A10.10photoelectric effect in zincUse UV light to discharge a clean zinc plate mounted on an electroscope.
7A50.40vibrating circular wireExcite a circular wire at audio frequencies by an electromagnet drive to produce standing waves.
7A60.10electron diffractionRings or spots are shown with the old Welch electron diffraction tube.
7B10.10line spectra and student gratingsHave students view line sources through replica gratings.
7D10.10gieger counter & samplesListen to a Geiger counter when radioactive samples are tested.
7D30.60diffusion cloud chambersDry ice diffusion cloud chambers.
8A10.10Orrery modelA mechanical model of the inner planets.
8A10.25phases of the moonView a ball illuminated by a distant light with a tv camera as the angle between the ball and light varies.
8A10.55retrograde motion modelTwo balls connected with a rod fixed through one ball and sliding through the other orbit on common ficus.
8A10.80celestial sphereA simple model celestial sphere is made from a round bottom flask. Pictures.
8C10.10expanding universePull a rubber hose threaded through five large styrofoam balls.


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