Find the Formula for Bulk Modulus

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Discussion Overview

The discussion revolves around the formula for bulk modulus, including its definition and potential errors in commonly referenced sources. The scope includes theoretical understanding and clarification of the formula's components.

Discussion Character

  • Technical explanation, Debate/contested

Main Points Raised

  • One participant requests the formula for bulk modulus urgently.
  • Another participant suggests that searching online resources like Google or Wikipedia is often quicker than asking on forums.
  • A participant claims that Wikipedia contains a small error in the bulk modulus equation, specifically noting a missing minus sign and providing a corrected version of the formula.
  • A later reply indicates that the sign error has been corrected, but does not elaborate on the implications of this correction.

Areas of Agreement / Disagreement

There is no consensus on the best approach to finding the formula, as some participants advocate for online searches while others engage in correcting the formula itself. The discussion reflects differing opinions on the reliability of online resources.

Contextual Notes

The discussion highlights a potential error in the Wikipedia entry regarding the bulk modulus formula, but does not resolve the implications of this error or the accuracy of the proposed correction.

isabella
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Anybody knows the formula for bulk modulus? Need answers ASAP
 
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Jelfish said:
If you ever need an equation, it'll probably be faster to look up google or wikipedia than to ask at a message board.
Absolutely true.

However, in just this one case, Wiki has a small error in the equation they provide. That equation is missing a minus sign. It should read :

[tex]K= -V~ \frac { \Delta P}{\Delta V}[/tex]

where

[tex]\Delta P \equiv P_{final} - P_{initial}[/tex]

[tex]\Delta V \equiv V_{final} - V_{initial}[/tex]

Still, this has taken half a day, for something that can be found in less than 5 minutes using Google. But this way, you have to do no work.
 
Last edited:
The sign error has been corrected.
 

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