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Demonstrations

Identifier Title Summary
FL: HS - 007 Lifting and Dropping a Mass with Changes in Pressure

An 84-lb weight is lifted as a result of a vacuum.

84-lb weight rests on a cart beneath a vacuum chamber apparatus.
E&M: M - 003 Lifting Magnet

4 D-cell batteries are used to lift a 25-lb weight.

A small electromagnet is suspended above a plate attached to a 25-lb weight.
Astro - 006 Light Intensity Relative to Spectrum

A 150 W light bulb in a desk lamp is connected to a power stat.  Students view the light through diffraction gratings to see that the spectrum doesn't change as the light intensity changes.

A lamp with no shade is connected to a power stat next to a box of diffraction gratings
L: W - 032 Light Scattered by Powdered Milk
E&M: Ind - 022 Lighting an LED with a Spike

A voltage spike is produced by an inductor.

Power Supply, Electromagnet with core, tap switch, LED
E&M: Ind - 028 Lighting an LED with Faraday's Law

A coil of wire and a magnet use induction to light an LED.

A coil of wire connected to an LED, next to a magnet
E&M: M - 025 Liquid Oxygen

Liquid oxygen forms a bridge across the cones of a strong horseshoe magnet.

A dewar of liquid nitrogen and the strong horseshoe magnet with cones
T: H - 030 Liquification of Air

An air balloon is dipped into liquid nitrogen to create liquid

Liquid nitrogen and a long air balloon
M: SHM - 007 Lissajous Patterns
E&M: Ind - 021 Loop with Bulb and Electromagnet

A loop of wire near a magnetic field lights an LED

Electromagnet, Loop of wire, LED
T: H - 012 Low Temperature Behavior

Assorted objects are submerged in liquid nitrogen and smashed

carnation, dewar of liquid nitrogen, ball, rubber, marshmallows, spoon, tongs
E&M: Ind - 024 LRC Circuit
L: GO - 010 Lucite Coil

A Lucite coil is used to demonstrate internal reflection.

Lucite Coil and a Green Continuous Use Laser Pen
FL: HS - 010 Magdeburg Hemispheres

Air is evacuated from the Magdeburg Hemispheres, after which they cannot be separated.

Two sides of the Magdeburg Hemispheres rest on the surface of the cart along with the accessories needed for the demo
L: GO - 011 Magic Corn Oil
M: EngMom - 015 Magic Rollback Can

A can will roll away from the lecturer, pause, and roll back toward the lecturer.

Yellow can
M: S - 014 Magic Yo-Yo

A large yo-yo

Large yo-yo
E&M: M - 035 Magnetic Field Around a Current-Carrying Wire

Iron filings are used to produce an image of the magnetic field lines surrounding a vertical wire.

Vertical wire attached to a power supply set on a lecture bench
E&M: M - 032 Magnetic Field Around a Solenoid

A solenoid of wire connected to a power supply produces a magnetic field, visible in a sprinkle of iron filings.

Solenoid of wire woven through plexiglass
E&M: M - 001 Magnetic Field Caused by Electric Current

A compass needle moves to realign with a magnetic field created as current flows through a wire.

A wire is suspended above a compass.
E&M: M - 040 Magnetic Field of a Solenoid in Liquid

Current run through a small solenoid is used to show the magnetic field under the document camera.

A small solenoid around a liquid of iron filings connected to a power supply
E&M: M - 009 Magnetic Materials
E&M: M - 015 Magnetization using Earth's Magnetic Field
E&M: M - 004 Magnetization vs. Electrification

Bar magnets and the electrostatics equipment are used to show that magnetization has no effect on electrical behavior.

Magnet + magnet on rotating stand
M: EngMom - 025 Map of Iowa

A map of Iowa is used to determine center of mass.

Map of Iowa hanging from a ring stand
L: W - 062 Marshmallows in a Microwave

This demonstration is identical to EM: AC - 009

The pattern of marshmallows created due to standing waves in the microwave
E&M: AC - 009 Marshmallows in the Microwave

A standing wave pattern is visible on an array of marshmallows placed in a microwave

A pattern of marshmallows created by the standing wave in a microwave
FL: HS - 006 Mass of Air

A balloon and a digital balance are used to demonstrate that air has mass

Scale
M: CM - 005 Mechanical Model of a Cream Separator

When a crank is turned, balls of dissimilar mass separate as they move through their circular path.

Mechanical Model of Cream Separator
M: WM&S - 020 Mechanical Model of Doppler Effect
L: W - 028 Mechanical Model of Polarization
M: WM&S - 006 Mechanical Model of Refraction
L: GO - 015 Mechanical Model of Refraction
E&M: C - 022 Mechanical Model of Resistance

Ping pong balls travel down a board of nails to demonstrate resistance.

A board of nails, a hose, and a box of ping pong balls
M: WM&S - 007 Mechanical Model of Standing Waves
M: CM - 010 Merry-Go-Round

A wheel with a piece of clay on it is sped up until the clay flies from the wheel.

Motor with rotating platform and piece of clay
M: WM&S - 028 Metallophone

A metallophone is used to demonstrate concepts in sound.

A toy metallophone and an actual metallophone
M: S - 006 Meter Stick on Movable Supports
M: SHM - 009 Metronome

A metronome is used to demonstrate the effect that length has on period

A wooden metronome
L: W - 021 Michelson Interferometer
L: GO - 052 Microwave Reflection
E&M: Ind - 003 Mini-Electric Generator

A small, hand-held generator lights an LED by turning a crank.

A hand-held AC generator connected to an LED
E&M: C - 024 Mixed Circuit

1 90-W bulb and 3 25-W bulbs are connected in both series and parallel

3 25-watt bulbs, 1 90-watt bulb, and an AC switch
L: W - 055 Model of Eye

A model of the human eye complete with an instruction manual

Model of the Human Eye
M: S - 018 Model Sailboat
E&M: C - 003 Model Transmission Line
T: H - 039 Models of Steam and Gasoline Engines

Two cut-away locomotive engines are available for display

Two cut-away locomotive engines
M: WM&S - 036 Moire Interference Patterns
M: Rot - 001 Moment of Inertia Using a Ramp

Objects of similar size that are weighted different are rolled down a ramp to see the effects of their moments of inertia on their motion.

Ramp with rolling objects
E&M: ES - 008 More Personal Van de Graaff Experience

A person's hair stands on end if in contact with Van de Graaff generator

Van de Graaff with plastic stool and non-human hair substitute