Code Number: 2C20.45
Demo Title: Attracting Balls or Sheets
Condition: Good
Principle: Coanda and Air Stream Around a Circular Object
Area of Study: Fluids
Equipment:
Hanging Balloons or Balls.
Procedure:
Hang two balloons or balls so that there is a narrow gap between them. Blow a stream of air between the two balloons and watch as the balloons move toward each other.
References:
- Clifford Swartz, "Bernoulli and Newton", TPT, Vol. 41, #4, Apr. 2003, p. 196.
- Harold Cohen and David Horvath, "Two Large-Scale Devices for Demonstrating a Bernoulli Effect", TPT, Vol. 41, #1, Jan. 2003, p. 9.
- "F-235. Two Light Bulbs on Strings", Dick and RAE Physics Demo Notebook, 1993.
- Charles Vivian, "Blowing the Air Away", Science Experiments & Amusements For Children, p. 65.
- Janice VanCleave, "In Not Out", Turning the World Inside Out and 174 Other Simple Physics Demonstrations, p. 35.
- Robert Ehrlich, "H.13. Fan Below Two Vertical Pieces of Paper", Turning the World Inside Out and 174 Other Simple Physics Demonstrations, p. 107 - 108.
- Jearl Walker, "Two Boats Drawn Together", The Flying Circus of Physics", p. 137.
- Cy Tymony, "Air Pressure Demonstration V", Sneakiest Uses for Everyday Things", p. 25.
- Cy Tymony, "Air Pressure Demonstration IV", Sneakiest Uses for Everyday Things", p. 24.
- Martin Gardner, "Three for Bernoulli", Science Tricks, p. 19.
- Julius Sumner Miller, Q119 & A119, Millergrams II – Some More Enchanting Questions for Enquiring Minds, p. 14 & 78.
- David Kutliroff, "74. Air Streams Do Strange Things", 101 Classroom Demonstrations and Experiment For Teaching Physics, p. 162.