Description
When two large spheres are smashed together with a piece of paper in between, the intense pressure at the point of contact generates enough heat to vaporize the paper. This rapid temperature rise is a direct result of the conversion of mechanical energy into thermal energy, highlighting the concept of heat generation through work. The demonstration vividly illustrates the first law of thermodynamics, where energy is neither created nor destroyed but transformed from one form to another. The burning smell of the vaporized paper provides a sensory confirmation of the energy transformation process.
PIRA DCS Number
4B60.140
Preparation & Instructions
Hang a piece of paper from a ring stand. Smash the balls together with the paper in between. Place the paper on the overhead projector to show the holes burned through the paper. For the benefit of the students sitting in the back you might point out that you can smell the burned paper.