AAPT Abstract Archive

Abstract Information

  Session: Labs and Apparatus Posters
  Paper Type: Poster
  Title: Vacuum Systems for Scientific Modeling
  Meeting: 2014 Summer Meeting: Minneapolis, Minnesota
  Location: N/A
  Time: 8:30PM
  Author: Tom M. Christensen
University of Colorado at Colorado Springs
719-255-3063, tchriste@uccs.edu
  Co-Author(s): Marilyn Barger, Raul Caretta, Richard Gilbert, James Solomon
  Abstract: Many high schools and universities have small vacuum systems that are used primarily for demonstrations. We review here more advanced laboratory applications of vacuum systems that have been developed as part of the annual AVS Science Educator's Workshop.* An emphasis on scientific modeling of exponential processes and non-ideal behavior of gasses can give students a better understanding of real science and engineering. We focus on two vacuum system experiments in which we connect theory, model, and observations. The first experiment examines the pump down characteristics of the vacuum system which is predicted to follow an exponential behavior. The second examines Boyle's law but demonstrates that the ideal gas model is not obeyed allowing discussion of a polytropic model and methods for determining the exponent in the model from experimental data. Additional advanced experiments will be summarized.
  Footnotes: *https://www.avs.org/Education-Outreach/Science-Educators-Workshop
  Presentation: Christensen-AAPT-VacSystems2014.pdf

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