1. Bernoulli's equation is a principle in fluid dynamics that describes the behavior of a moving fluid. 2. It states that the total mechanical energy of the fluid remains constant along a streamline, assuming no energy losses due to friction or other dissipative effects. 3. This includes three types of energy: kinetic energy, potential energy, and pressure energy. 4. Therefore, Bernoulli's equation is a statement of the conservation of energy in a fluid flow. 5. It does not directly state the conservation of volume, mass, or momentum, although these are also important principles in fluid mechanics. Final answer: Bernoulli's equation is a statement of the conservation of energy.