A pendulum is constructed from a 1.0-kg mass suspended from the ceiling, with a length of strong string long enough so that, when pulled about 40o from the vertical, the mass comes to nose level. The pendulum will be released from this position. The demonstrator is to remain absolutely still until the pendulum makes at least one full cycle. This very-simple-to-perform demo can be made very memorable by playing up the drama. The possibility of seeing the teacher’s blood will excite the class. It will even test one’s faith in the laws of Physics.
Related Resources:
Teacher Demos: A. Digestive enzymes, B. Control of Breathing, C. Baroreceptor Reflex
Categories: Teacher Demonstration
These three demos allow students to experience applications of knowledge of the digestive, respiratory, and circulatory systems by doing very short activities on themselves. They also allow the... read more
Teacher Demo: Osmosis Across a Semi-permeable Membrane
Categories: Teacher Demonstration
Osmosis, the movement of a solvent (usually water) across a semi-permeable membrane from an area of higher solvent concentration to an area of lower solvent concentration, is key in the maintenance... read more
Teacher Demo: Bending Light - Part II
Categories: Teacher Demonstration
In this demonstration, laser light is bent as it travels through a sugar (or salt) solution of varying concentrations. read more
