Tabung Pitot

\begin{equation*}
\begin{split}
P_1 + \cancel {\rho \: g \: h_1} + \tfrac{1}{2} \: \rho \: v_1^2 & = P_2 + \cancel {\rho \: g \: h_2} + \tfrac{1}{2} \: \rho \: v_2^2 \quad {\color {blue} \text{Titik (1) dan (2) sejajar, maka } h_1 = h_2} \\\\
P_1 - P_2 & = \tfrac 12 \: \rho \: (v_2^2 - v_1^2) \quad {\color {blue} v_1 = 0}\\\\
\rho' \: g \: \Delta h & = \tfrac 12 \: \rho \: v_2^2\\\\
13600 \:.\: 10 \:.\: 0,2 & = \tfrac 12 \:.\: 1,36 \:.\: v_2^2\\\\
400000 & = v_2^2 \\\\
v_2 & = 200 \text{ m/s}
\end{split}
\end{equation*}