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Code Number: 3D40.51
Demo Title: Spouting Bowl
Condition: Excellent
Principle: Forced Vibrations, Nodes and Antinodes
Area of Study: Oscillations & Acoustics
Equipment:
Spouting Bowl, Damp Towel, and Styrofoam Cup.
Procedure:
Fill the bowl with water up to the line and then set it onto a sheet of non-slip mat. Wash your hands thoroughly with soap and without drying start rubbing your palms on the handles. This should build a resonant vibration in the bowl, as shown by the water that "dances" out of the bowl much like a fountain.
A Styrofoam cup is filled with water. Vibrations can be set up by sliding the cup across the lecture bench at the proper speed.
References:
- Yan-Iai Yan, "Three Demonstrations from Ancient Chinese Bronzeware", TPT, Vol. 30, # 6, Sept. 1992, p. 341.
- Henry l. Bartosik, "Music for my Ears", TPT, Vol. 29, # 2, Feb. 1991, p. 70.
- Thomas D. Rossing, "Wine Glasses, Bell Modes, and Lord Rayleigh", TPT, Vol. 28, # 9, Dec. 1990, p. 582.
- David Keeports, "Standing Waves in a Styrofoam Cup", TPT, Vol. 26, # 7, p. 456 October 1988.
- Jearl Walker, "2.71, Edge Waves", The Flying Circus of Physics Ed. 2, p. 111.
- Christopher P. Jargodzki, and Franklin Potter, "109, Spouting Water Droplets", Mad About Physics, p. 39.
- T. D. Rossing, C. J. Chiaverina, "# 8, Two Dimensional Standing Waves", Light Science, Physics and Visual Arts, p. 47.