Bernoulli's theorem is a consequence of conservation of:

CONCEPT:Bernoulli's principle: For a streamlined flow of an ideal liquid in a varying cross-section tube the total energy per UNIT volume remains constant throughout the fluid.This means that in steady flow the sum of all forms of MECHANICAL energy in a fluid along a STREAMLINE is the same at all points on that streamline.From Bernoulli's principle\(\frac{{{{\rm{P}}_1}}}{{\rm{\rho }}} + {\rm{g}}{{\rm{h}}_1} + \frac{1}{2}{\rm{V}}_1^2 = \frac{{{{\rm{P}}_2}}}{{\rm{\rho }}} + {\rm{g}}{{\rm{h}}_2} + \frac{1}{2}{\rm{v}}_2^2\)\(\frac{{\rm{P}}}{{\rm{\rho }}} + {\rm{gh}} + \frac{1}{2}{{\rm{v}}^2} = {\bf{constant}}.\)EXPLANATION:Bernoulli's principle is based on the principle of conservation of energy. So at each point, the net energy is conserved in the fluid.