Expand knowledge base

1 files changed, 11 insertions, 3 deletions

diff --git a/content/know/concept/hydrostatic-pressure/index.pdc b/content/know/concept/hydrostatic-pressure/index.pdc
index 3bbb0af..90e57ce 100644
--- a/content/know/concept/hydrostatic-pressure/index.pdc
+++ b/content/know/concept/hydrostatic-pressure/index.pdc
@@ -5,6 +5,7 @@ publishDate: 2021-03-12
 categories:
 - Physics
 - Fluid mechanics
+- Fluid statics
 
 date: 2021-03-12T14:37:56+01:00
 draft: false
@@ -167,9 +168,16 @@ $$\begin{aligned}
     = \nabla \Big( \Phi + w(p) \Big)
 \end{aligned}$$
 
-By defining the **effective gravitational potential** $\Phi^* = \Phi + w(p)$,
-we get the cleanest form yet of the equilibrium condition,
-which states that $\Phi^*$ must be a constant:
+From this, let us now define the
+**effective gravitational potential** $\Phi^*$ as follows:
+
+$$\begin{aligned}
+    \boxed{
+        \Phi^* = \Phi + w(p)
+    }
+\end{aligned}$$
+
+This results in the cleanest form yet of the equilibrium condition, namely:
 
 $$\begin{aligned}
     \boxed{