Browsing 230 - 240 results of 346 programs for subject - General Science
The science behind the water bottle membranophone, including a discussion of how air vibrates the instrument's membrane, producing sound.
An introduction to a spinning disc called a stroboscope, which lets you create your own animated cartoon. A detailed demonstration of how to make a stroboscope, including a discussion of materials needed. The science behind the Whirling Watcher stroboscope, including a discussion of the phenomenon called persistence of vision, which in this activity creates the illusion of a galloping horse. An introduction to the jitterbug, a simple motorized toy made of a recycled CD and a DC motor. A detailed demonstration of how to make this toy, including a discussion of materials needed. The science behind this toy, including a discussion of how electric circuits work, and how an unbalanced load (an off-center weight on your jitterbug) results in rotational vibration. At the Balancing Ball exhibit, a plastic beach ball floats mysteriously several feet above a large plastic cone. Upon closer inspection, the ball is found to be floating on a stream of air blowing out of the cone; visitors interact with the ball, changing its position in relation to the air flow. The Chaotic Pendulum exhibit contains a deceptively simple set of pendulums in a steel and Plexiglas case. The visitor twists a protruding knob, expecting the resulting motion to be fairly predictable. But the device's motion is chaotic, extremely complicated and long-lived. Artist Sheldon Brown creates an urban/suburban/rural environment in which the visitor literally "paints" the flying landscape with highways, buildings, and automobiles. This exhibit was part of the Virtual Unreality exhibition.