Pipe Pops its Cork due to Heating

Concept Overview:

Conversion of mechanical work into heat

Lecturer Demonstration

Step(s) to Follow

1. Place wooden slats around tube.
2. Squeeze tightly (but not so tight as to stall motor)
3. Use foot pedal to turn on motor
4. Wait

Expected Result

Friction between the tube and the wooden slats will heat the metal of the tube. This, in turn, will heat the water inside the tube to the point of evaporation. A build up of pressure will blow the stopper out of the tube.

Take care not to point the tube at a person.