- Sections
- A. General Materials & Mathematics
- B. Statics
- C. Kinematics & Dynamics
- D. Rotational Mechanics
- E. Gravitation & Astronomy
- F. Fluid Mechanics
- G. Vibrations & Mechanical Waves
- H. Sound
- I. Thermodynamics
- J. Electrostatics & Magnetostatics
- K. Electromagnetic Principles
- L. Geometrical Optics
- M. Wave Optics
- N. Spectra & Color
- O. Vision
- P. Modern Physics
Twirl-A-Tune
Purpose
To demonstrate standing wave resonances in an open tube.
Equipment
Twirl-a-Tune.
Images
Description
To produce resonant frequencies of the tube, hold the tube by one end, keeping that end free for flow of air, and swing it around your head. Increasing the speed of the rotation raises the harmonic produced. Up to seven harmonics can be produced, illustrating the notes of the overtone series. The fundamental can only be produced by blowing gently into one end.◙
References
Frank S. Crawford, Singing Corrugated Pipes, AJP 42, 278-288 (1974). ◙J. A. Soules and Michael Kanner, The Normal Modes of the "Hybrid Hummer, " AAPT Announcer, 129, (Dec. 1988). Louis H. Cadwell, Singing Corrugated Pipes: Using Video Cameras to Measure Air Flow, TPT 32, 42-43 (1994). Louis H. Cadwell, Singing corrugated pipes revisited, AJP 62, 224-227 (1994).
-
See pagesg1. simple harmonic motion
-
See pagesg2. resonance & coupled oscillations
-
See pagesg3. mechanical waves one dimensional
-
See pagesg4. mechanical waves two dimensional
-
See pagesg1. simple harmonic motion
-
See pagesg2. resonance & coupled oscillations
-
See pagesg3. mechanical waves one dimensional
-
See pagesg4. mechanical waves two dimensional