I need someone's brain juice here?

Slightly off topic but the other newsgroups aren't as read....

Here's two web links on two widely understood fluid pressure models:

http://hyperphysics.phy-astr.gsu.edu/hbase/pman.html#meac

http://hyperphysics.phy-astr.gsu.edu/hbase/pasc.html#hpress


Both are related to vertical pressure (or Force / Area = pressure) on a
fluid, yet both use 2 completely different equations to calculate the
fluid's vertical travel distance.

One use's the fluid's density the other simply says Work1 = Work2 thus
F1*D1 = F2*D2
(or P1*A1*D1 = P2*A2*D2) where as the other says P1 = density * H *
gravity + P2

If you look at both models you'll notice that H = D1+D2


Anyone with enough brain juice to tell me why the difference, I can't
figure it out since both models simply practically the same????

.

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