Demonstrations

Identifier Title Demo Summary
M: WM&S - 016 High Quality Tuning Forks and Sound Rods

A collection of high quality tuning forks and rods stored in a convenient box.

Box of tuning forks and sound rods
M: WM&S - 017 Sound Wave Interference with Audacity

Audacity (music editing program), in conjunction with the lecture hall speakers, is used to demonstrate constructive and destructive interference.

A screen shot of a 750 Hz tone in Audacity.
M: WM&S - 019 Rotating Tuning Fork
M: WM&S - 020 Mechanical Model of Doppler Effect
M: WM&S - 021 Resonance Boxes

Striking 1 bar with the mallet will produce tone on the other; Striking both bars, with a clip on 1, will produce beats.

Two resonance boxes and a mallet
M: WM&S - 022 Tone by Speed of Air
M: WM&S - 023 Amplify Tuning Fork with Mouth
M: WM&S - 024 Speaking with Helium
M: WM&S - 026 Vibrations on a Bar
M: WM&S - 027 Musical Slats
M: WM&S - 028 Metallophone

A metallophone is used to demonstrate concepts in sound.

A toy metallophone and an actual metallophone
M: WM&S - 029 The Sonometer
M: WM&S - 030 Combinational Tones
M: WM&S - 031 Harmonic Pipe

A harmonic pipe connected to the in-house air supply can produce multiple overtones

The harmonic pipe rests on a white table.
M: WM&S - 033 Twirling Sound Hose

A long tube is whirled in a circular motion overhead to produce a single tone.  Whirling at a faster speed creates overtones/higher harmonics.

3 Twirling Sound Hoses
M: WM&S - 034 Singing Rods
M: WM&S - 035 Fourier Synthesis
M: WM&S - 036 Moire Interference Patterns
M: WM&S - 039 Resonance Rods

6 wooden cubes of 3 differing colors and lengths are attached to a board.  Wobbling the board back and forth at a different frequency will cause resonance in different colors of cubes

Resonance Rod Apparatus
M: WM&S - 041 Drinking Straw Resonance
M: WM&S - 042 Torsion Wave Demonstrator

A collection of rods mounted on torsion wire can be used to demonstrate wave motion.

Torsion Wave Machine
M: WM&S - 043 Audio Beats

Two frequency generators are used to produce beats, consonance, and/or dissonance

Oscilloscope, 2 Frequency Generators, and a Speaker
M: WM&S - 045 Doppler Effect

A whistle whirled in a circular path demonstrates the doppler effect

Doppler whistle and power supply
M: WM&S - 048 Musical Instruments
M: WM&S - 050 Speaker and Candle

A candle in front of a speaker will flicker when a speaker produces sound waves.

A speaker sits on the second shelf of a cart with a candle in front of it.  A frequency generator and amplifier sit on the top shelf of the cart
M: WM&S - 052 High Frequency EM Waves

A radio transmitter with Hertzian Dipole Antenna is used to create a standing wave.

Dipole Apparatus
M: WM&S - 053 Organ Pipes/Vibrating Columns of Air

A large pan-flute made of open-pipe tubes is used to demonstrate the physics of organs.

Large pan flute
M: WM&S - 054 Helmholtz Resonators

Sound is produced when blowing across the mouth of a pop bottle

Two plastic bottles
M: WM&S - 055 Slide Whistle

A slide whistle is used to demonstrate how pitch changes with the length of the cavity.

Slide Whistle
T: H - 002 Sagging Wire

As current is passed through a wire, it heats up and expands

A paper card hands from a wire suspended between 2 points
T: H - 003 Bimetallic Strips

A strip composed of two different types of metals is dipped into a dewar of liquid Nitrogen.  Since the metals contract at a different rate, they will curve one direction or the other.

Two metal strips composed of different types of metal sit on the bench top.
T: H - 005 Differential Gas Thermometer

A differential glass thermometer shows how liquids expand as they get warm.

Differential Glass Thermometer
T: H - 006 Expansion and Contraction of Rings using Ball

A metal ring expands when heated.  A metal ring contracts when cool.  This is shown by whether or not they fit over a metal ball.

A dewar of liquid nitrogen, a metal ball suspended from a stand rod, a meeker burner, and 2 metal rings rest on a bench
T: H - 010 Lamp with Heat

The wires of a small lamp are placed into an open flame.  As the wires heat up, the lamp dims due to the change in resistance of the wire.

small lamp attached to a coil of wire, held horizontal on a small ring stand, and suspended above a bunsen burner
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
T: H - 014 Thermal Conductivity Comparison

Rods of various metals have steel balls attached by wax.  One end of the rods are heated in the flame of a bunsen burner.  Over time, the balls on the rods drop off at different times.

3 ring stands with rods of different metals.  The rods have balls attached by wax.  All three rods converge over a bunsen burner
T: H - 015 Boiling Water in Plastic Bottle
T: H - 016 Paper with Wood and Metal
T: H - 017 Davy Safety Lamp
T: H - 018 Convection of Gases

2  demonstrations that show air movement caused by differences in temperature.

A candle in a glass tube and a chimney with a horizontal windmill.
T: H - 019 Radiation Transfer with Mirrors

Two parabolic mirrors are used to transfer the heat from one, across the demo bench, to light matches in the other.

2 cones mounted across the bench from each other.
T: H - 020 Laser and Balloon
T: H - 024 Paraffin Cake and Dissimilar Cylinders

5 cylinders made of different metals are heated and placed on top of a paraffin cake to demonstrate their differences in specific heat.

5 dissimilar cylinders melt through paraffin at different rates
T: H - 025 Dry Ice

Pieces of dry ice are used to help students visualize the P vs. T graph for Carbon Dioxide

Styrofoam Cooler, Dry Ice, Tongs
T: H - 026 Regelation of Ice

Due to pressure, a wire melts through an ice cube that remains intact.

2 kg hang from a wire placed atop an ice cube - apparatus is hung from a ring stand; a cup of ice rests nearby
T: H - 027 Gyser
T: H - 028 Cryophorus

A cryophorus is used to demonstrate that freezing can occur by rapid evaporation

A cryophorus rests next to a dewar of liquid nitrogen
T: H - 030 Liquification of Air

An air balloon is dipped into liquid nitrogen to create liquid

Liquid nitrogen and a long air balloon
T: H - 032 Cloud in a Bottle
T: H - 033 Boiling Water with an Ice Cube

Water boils due to the presence of an ice cube.

Flask of water, bunsen burner, stand for boiling, ice cubes, gloves

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