3C20.20 - Zip Strips

Put a knot in the top end of the zip strip and insert into the cup up to the knot.  Using your finger nail on the raised ridges that are on one side of the strip, smoothly pull down the length of the strip.   The strip should make a sound that is close to understandable words.  Strips come with words such as "Happy Birthday", "Happy New Year",  and "Science is Fun".
Code Number:
3C20.20
Demo Title:
Zip Strips
Condition:
Good
Principle:
Vibrations
Area of Study:
Acoustics
Equipment:
Styrofoam Cup, Zip Strips.
Procedure:

Put a knot in the top end of the zip strip and insert into the cup up to the knot.  Using your finger nail on the raised ridges that are on one side of the strip, smoothly pull down the length of the strip.   The strip should make a sound that is close to understandable words.  Strips come with words such as "Happy Birthday", "Happy New Year",  and "Science is Fun". 

References:
  • Carson I. A. Ritchie, "The Clucking Hen", Making Scientific Toys, p. 53.
  • Martin Gardner, "79, Paper Cup Squawker", Smart Science Tricks, p. 118.

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