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Groan Tubes, Case of 36

Product # P7-7165

This product has been discontinued

Groan Tubes, Case of 36

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Get a case load of our Groan Tubes!

A simple, fun demonstration of resonance. Listen as the plug slides in the tube -- The pitch will rise as the resonant column of air gets shorter and fall as it gets longer.

"Groan Tubes are interesting for demonstrations of sound, but they can also be used to teach about free fall. Turn the tube so it starts to groan, and quickly toss it to a friend (so that the tube stays vertical). Listen. The groan stops when the tube is in the air and resumes when it is caught!"
Chris Chiaverina ~ Physics Teacher

Products being sold are not toys. They are for Educational / Laboratory use only. They are not for use by children 12 and under.