Learning Activities 4.2: Demonstrations of Various Physical Phenomena in Vacuum Systems

This 4-page learning activity is from the Introduction to Vacuum Technology Student and Instructor Laboratory Manuals that accompany the Introduction to Vacuum Technology E-Book published by Erie Community College. The activity has students qualitatively investigate the effects of reduced pressure on propagation of sound and the effects of reduced pressure on performance of mechanical systems such as a fan.

A summary of learning activities, learning objectives, theoretical background, and the activity procedure are included. Learning outcomes include:

• Qualitatively explain how vacuum conditions affect the propagation of sound waves.
• Qualitatively explain the observed behavior of a fan operating at different pressure levels.

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