Kinetic Theory Model provides in analogue form a visual representation of molecular movement in gases.
Metal spheres, simulating gas molecules, are propelled upwards in a tube by the piston's vibrations.
A piston, in a wide perspex tube, is vibrated by a low-voltage electric motor housed in a box supporting the tube.
The motor is provided with a speed control.
Higher speeds give more extensive movements of the spheres.
For demonstrations to larger groups illumination from the side and a black background are recommended, to highlight the spheres.
The movements of the spheres are seen to be random both in direction and extent
Kinetic Theory Model Operation Manual, Lab Instructor Guide and Student Workbook. Kinetic Theory Model for Educational Vocational, Didactic Technical Training Equipment Labs.