2" ball bearings & tissue paper

 

Code Number: 4B60.18

Demo Title: Smashing Spheres - 2" Ball Bearings

Condition: Good

Principle: Mechanical Energy Converted to Heat

Area of Study: Thermodynamics

Equipment: 

2" ball bearings, tissue paper or regular paper.

Procedure:

Hold paper between the two ball bearings.  When the bearings are smashed together heat is generated at the point of contact and burns a hole in the paper.  Note: smell of burnt paper will be apparent.

References:

  • James Rohr, Si-Yin Wang, and Vitali F. Nesterenko, "'Ripples' in an Aluminum Pool?", TPT, Vol. 56, #5, May 2018, p. 281.
  • Stephen Brusca, "Heating the Hard Way", TPT, Vol. 28, #4, Apr. 1990, p. 240.
4B60.18 - Smashing Spheres