Experimental Values vs. Theoretical Values

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Discussion Overview

The discussion revolves around the comparison of experimental values of the speed of sound with theoretical predictions. Participants explore the factors that may influence the relationship between these values, including the models used for prediction and historical context of experimental validation.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant suggests that the outcome of comparing experimental values to theoretical values depends on the method used to determine the speed of sound.
  • Another participant notes that the answer hinges on the model employed to predict the velocity, implying variability in predictions based on different theoretical frameworks.
  • A different participant references historical instances where theoretical values were incorrect, leading to improved experimental methods and recalculations, specifically mentioning the electron g factor as an example.

Areas of Agreement / Disagreement

Participants do not reach a consensus; multiple competing views regarding the relationship between experimental and theoretical values remain, with emphasis on the influence of models and historical context.

Contextual Notes

Participants highlight the dependence on specific models and methods for determining the speed of sound, as well as the historical inaccuracies in theoretical predictions that prompted further experimentation.

DBJKIBA
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Hi, if say you are determining the speed of sound and you want to compare your values to the theoretical value, would you predict that your experiment values will be higher or lower than the theoretical value and why?
 
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Depends on how you are determining the speed of sound.
 
Ha! I would have answered: "it depends on the model used to predict the velocity".
 
Hi DBJKIBA-
Many important experiments were successful BECAUSE the experimenters did not believe the theoretical value was correct. In fact it wasn't.
I recall a theoretical calculation of the electron g factor (by Karplus and Kroll) that was wrong, and the disparity with previous experiments led to a succession of new and better experiments, and a recalculation of g.
Bob S
 

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