Hydraulics and Fluid Mechanics in ME
The Bernoulli's equation is based on the assumption that

The velocity of flow is uniform across any cross-section of the pipe
No force except gravity acts on the fluid
All of these
There is no loss of energy of the liquid flowing

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Hydraulics and Fluid Mechanics in ME
Reynolds number is significant in

full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc
All of these
supersonics, as with projectile and jet propulsion
simultaneous motion through two fluids where there is a surface of dis-continuity, gravity forces, and wave making effect, as with ship’s hulls

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