2C20.63 - Bernoulli Demo - Weather Balloon Curve Ball

Take the weather balloon and draw the stitches of a baseball on it. Fill the balloon with part air and part helium to the desired diameter, so that the balloon has neutral buoyancy.
Tape the end of the balloon so that it is flat against the surface of the sphere. Throw the balloon into the classroom crowd with some spin and watch the balloon curve.
Code Number:
2C20.63
Demo Title:
Bernoulli Demo - Weather Balloon Curve Ball
Condition:
Good
Principle:
Bernoulli Principles on a Baseball.
Area of Study:
Chem and Physics of the Env.
Equipment:
Large Latex Weather Balloon (Edmund Scientific), Helium.
Procedure:

See also 2C20.63 in Heat and Fluids

Take the weather balloon and draw the stitches of a baseball on it. Fill the balloon with part air and part helium to the desired diameter, so that the balloon has neutral buoyancy. Tape the end of the balloon so that it is flat against the surface of the sphere. Throw the balloon into the classroom crowd with some spin and watch the balloon curve. 

References:
  • Rod Cross, "Aerodynamics of a Party Balloon", TPT, Vol. 45, # 6, Sept. 2007, p. 334.

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