Observe the starting state
Look at the bell and read the pressure/control labels.
RELATED PHYSICAL DEMONSTRATION 30 sec
Related project operating reference
Related project reference for Sound in a vacuum exhibit — Zichuan. Look at the bell and read the pressure/control labels.
Product details & project options Browse the video library · Page 53A TEXT GUIDE TO THE VIDEO
A transparent dome encloses a bell and demonstration components above a round control cabinet. Sound relies on a material medium to carry mechanical vibrations; reducing the air in the chamber changes the audible response while the moving bell remains visible. The activity links pressure, a visible mechanism and listening in one compact station.
Look at the bell and read the pressure/control labels.
Use the intended visitor control with the chamber closed.
Relate what remains visible to the sound response during the sequence.
This guide describes the visible action. The final performance and operating specification are agreed for the project.
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