Bernoulli's theorem of conservation in a nozzle spraying to atmosphere

[Michael V]

Hi there, I'm having a problem behind the theory of bernoulli's theorem. Can it be applied in an application where water flows from a pump into a pipe with x diameter and out of a nozzle with y diameter to atmosphere. There is a pressure gauge on said pipe. There is a nozzle screwed into this pipe with no pressure gauge on it.

Is the gauge pressure at the nozzle atmospheric pressure, 0 or is it what can be calculated using bernoulli's theorem of conservation of energy?

 

[Michael V]

Ive just found this worked example. It says that the pressure at the outlet is 0. Why is this?