Question

Bernoulli’s principle is based on the law of conservation of:
(A) Mass
(B) Energy
(C) Angular momentum
(D) Linear

Answer 1

The law of conservation of energy states that total energy of an isolated system remains constant, it is said to be conserved overtime. For instance, chemical energy is converted to kinetic energy when a stick of dynamite explodes.

Complete answer:
Bernoulli’s principle is based on the law of conservation of energy. We equate total energy (pressure energy, potential energy and kinetic energy) of flowing liquid at different points flowing under constant pressure difference. Conditions for applicability of Bernoulli’s principle are the flow must be steady, i.e. the fluid velocity at a point cannot change with time, the flow must be incompressible even though pressure varies, the density must remain constant along a streamline, friction by viscous forces has to be negligible.

So, the correct answer is “Option B”.

Additional Information:
if the fluid flows horizontally so that no change in gravitational potential energy occurs, then a decrease in fluid pressure is associated with an increase in fluid velocity. If the fluid is flowing through a horizontal pipe of varying cross-sectional area, for example, the fluid speeds in constricted areas so that the pressure the fluid exerts is least where the cross section is smallest. This phenomenon is sometimes called the venturi effect.

Note:
Bernoulli’s principle, physical principle formulated by Daniel Bernoulli, states that as the speed of a moving fluid increases, the pressure within the fluid decreases. Since the speed is greater in the narrow pipe, the kinetic energy of that volume is greater. In simple words the definition of Bernoulli’s principle is the concept that an increase in a liquid’s speed creates a pressure decrease and a decrease in a liquid’s speed creates pressure increase.