Find the Formula for Bulk Modulus

AI Thread Summary
The formula for bulk modulus is K = -V (ΔP/ΔV), where ΔP is the change in pressure and ΔV is the change in volume. A discussion highlighted that Wikipedia had a minor error in its equation, missing a crucial minus sign. It was noted that searching Google or Wikipedia is often faster than asking on forums for equations. Despite the minor error, the correction was acknowledged, emphasizing the importance of accuracy in scientific formulas. Overall, users are encouraged to verify information from reliable sources.
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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 :

K= -V~ \frac { \Delta P}{\Delta V}

where

\Delta P \equiv P_{final} - P_{initial}

\Delta V \equiv V_{final} - V_{initial}

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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