Demos by PIRA

4D10 Brownian Motion


  4D10.10Brownian motion: Smoke particles viewed using TV camera.
  4D10.20Brownian motion: Like C+55+0, with an aluminum disk added.

4D20 Mean Free Path


  4D20.10Crooke's radiometer with flashlight, arc lamp or IR source.
  4D20.10Crooke's radiometer with flashlight, arc lamp or IR source.
  4D20.10Crooke's radiometer with flashlight or IR source.

4D30 Kinetic Motion


  4D30.10Mechanical model of a gas: Vibrating balls strike piston on OHP.
  4D30.10Mechanical model of a gas: Vibrating balls strike piston on OHP.
  4D30.20Mechanical model of a gas: Vibrating balls strike piston on OHP.
  4D30.20Mechanical model of a gas: Vibrating balls on OHP.
  4D30.40Stoekle's apparatus: Heated tube with mercury and glass bits.

4D40 Molecular Dimensions


4D50 Diffusion & Osmosis


  4D50.20Osmosis of helium through semi-porous cup.