Whether or not Galileo actually dropped balls from the Leaning Tower of Pisa, this demonstration will solidly demonstrate that objects are accelerated at the same rate, regardless of mass. You will, however, need a vacuum pump and a few...

A page from the University of Maryland Physics Lecture Demonstration Facility. Provides directions for a teacher demonstration which utilizes a Bell jar and vacuum pump to show the dependency of boiling point upon pressure. Shows...

A bell jar is evacuated to show the properties of a vacuum and air pressure. Pictures and a description of how to perform the demonstration are given.