Ear Drum Demos.
P.I.R.A #: 3C10.10
Illustrates: How the ear drum operates.
Description: One is similar to a drum. When you thump on it a puff of air can be felt at the other end of the tube. The other is a liquid filled beaker. When pressure is applied on the top the ball bearing inside moves.
Size: 12" l x 3" diameter.
Notes: Replace balloons as needed.
Hazard: Ball bearing could break beaker.
Condition: Fair.
Instructor Comments
