Northridge Demos. Name Description Tags Avail. Warnings

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1 Northridge s Name Description Tags Avail. Warnings Accelerometer, Water When the accelerometer is moving with a changing velocity, Acceleration, the liquid will not be level and the magnitude and direction of the acceleration can be illustrated by the degree to which the liquid is shifted. Add water Acrylic Prism Can spread white light into a spectrum or add a spectrum to make white light. Light, Color Req. light source Ball in Cup Ball at the end of lever arm drops and lands in a cup. Torque, Free Fall Bell In Vacuum Jar Sound Bell produces no sound when in vacuum. Sound Boyle's Law Lung nstrate how lung/diaphragm work. Pressure Bridge Set, Pasco Build bridges, trusses. Statics, Engineering Req. Assembly Center of Mass Centripetal Motion, Sling Weights Find the center of mass of irregular objects by hanging them and using a plum bob. Twirling a mass on a string caused mass on the other end to rise through a tube Inertia, Center of Mass Circular Motion, Centripetal Charge Inside Conductor Use Van de Graaff to charge outside of a cylinder. Pith balls inside show no charge, but on the outside, do. Electrostatics, Charge, Conductor Req. Van de Graaff Chem. Battery Cell Chemical battery/electrolysis Direct Current Req. Chemicals Chemical

2 Northridge s Cloud Chamber Chamber for observing radiation Nuclear, Radiation Extensive Set up Coil and Stand, Lenz's Law Tesla Coil Various demos: make ring jump, weld with coil, boil water, etc. High voltage AC sparks produced. Music video: Emf, Induced Current Radiation AC Cryophorus Freeze water using evaporation. Evaporation, phase change Cup and String sound, waves Telephone Down Hill Race Balls race by taking different paths down hill 2 Dimensional motion, kinetic energy Req. acetone & dry ice Cold Electro-Statics Fur/silk swatches of cloth and glass/acrylic rods to build up static charge Charge, Electric Fields Free Fall, Pasco Ball is dropped and time of drop is measured to find g Gravity, Acceleration nstration Gyroscope Bicycle wheel gyro Conservation of ME-8960, Pasco Angular Momentum Hand Boiler Boil alcohol in your hand Phase change Hook's Law Test Hook's Law Spring

3 Northridge s Human Eye of how the human eye with lenses works. Optics, Lenses Impulse Elastic/Inelastic Observe difference between elastic and inelastic collisions Impulse, Collisions Momentum Iron Filings, Magnetic Iron Filings take the shape of magnetic field around Magnetic Field Field magnets Kinetic Theory Model, Balls simulate gas atoms being excited by motorized piston Heat Magnet, Floating, Ring magnets on pole repel each other and levitate Magnetic Field Magnet, Magic Floating Horizontal floating magnet Magnetic Field Magnetic Field Board containing many tiny bars of steel that show a Magnetic Field nstrator magnetic field Magnetic Field Box filled with gel and iron filings with hole through center Magnetic Field Observation Box, for bar magnet Matter Model, Example of "Atoms" connected by "Springs" Matter, Solids, Heat Mechanical Oscillator, Cenco Apparatus Various shapes to oscillate on a speaker. Also a hoop to excite resonances in. Sound, waves Req. a frequency gen. Metal Cans for Vacuum Cans can be crushed with vacuum or heated with water and Heat, Pressure Fire Meter, Large Multiple quickly capped Large meter for classroom display Voltage, Current, Resistance Monkey and Hunter Projectile hits falling target in mid-air. 2-D motion, Kinematics Motor, Simple DC Large demo of DC motor/generator Generator, Motor, Faradays Law

4 Northridge s Newton's Cradle Metal balls collide and kick off other metal balls Kinematics, Conservation of Energy Ninja Ball Elastic rubber balls are on a rod in the order of decreasing size. When the system is dropped and hits the floor, the smallest ball shoots out at a very high speed. elastic collision, conservation, momentum, kinetic Extremely Fast Projectile Pendulum, Sand, A pendulum is suspended over a tray of sand and traces out patterns. Oscillatory motion Req. Parts (not available) Req. light source Radiometer, Light causes the vanes inside to rotate. Light, Heat, Photons Ray Optics Set large set of demo lenses and 5 ray light source Light Ring and Disk Moment of Inertia Race down an incline plane to show different moments of inertia. Moment of inertia, Rotational motion Scales for Electrical Meter For use with the large demo meter Voltage, Current, Resistance Slinky, Extra Long A super long slinky. Waves Spectrum nstration Kit Spectrum nstration Kit, Power Splitter Set of three high-intensity incandescent light with multiple color filters Goes with Spectrum nstration Kit. Used to adjust light intensity. Light, Color Mixing Do Not Touch Bulbs Light, Color Mixing Do Not Touch Bulbs Student Ballistic Pendulum A ball is shot into a pendulum Momentum, Collisions, Projectile

5 Northridge s Thermal Brass Sphere & Ring Thermo-Electric Converter Sphere will fit through a heated ring but not when chilled. Heat Fire A Peltier chip with two thermal contacts hooked to a motor will turn a fan if given a temp gradient. Heat, Electricity, Energy Chip will melt if not properly cooled Truss Set, Pasco Build bridges, trusses. Statics, Engineering Tube Radio Parts of a tube radio Electromagnetic radiation Tyndall Heat Capacity Heated metalic spheres melt through a wax disk at different Heat, Determination rates. Thermodynamics incomplete Moderate Setup Boiling water, hot metal Virtual Image Optical Illusion Wimshurst Machine Projects an optical illusion Builds up a large charge that can make a spark or be stored in Lyden jars Convex mirrors, light Electricity, Charge, Static