Torricelli's Law

Torricelli's law, also called Torricelli's principle or Torricelli's theorem, is the fluid efflux velocity flowing through an orifice under gravity at the bottom of a tank filled to a depth.  This is the same velocity from the orifice as a falling body over the same height due to gravity.

 

Torricelli's law formula
\(\large{ v = \sqrt{ 2 \; g \; h  }  }\)
Symbol	English	Metric
\(\large{ v }\) = velocity	\(\large{\frac{ft}{sec}}\)	\(\large{\frac{m}{s}}\)
\(\large{ h }\)  (Greek symbol rho) = height	\(\large{ft}\)	\(\large{m}\)
\(\large{ g }\) = gravitational acceleration	\(\large{\frac{ft}{sec^2}}\)	\(\large{\frac{m}{s^2}}\)