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**1. Homework Statement**

Hi! The problem states: Water through a certain sprinkler system flows trhough a level hose connected to a nozzle which is directed directly upwards. The water leaves the nozzle and shoots to a height, h, before falling back down again into a pool.

The hose is connected to a reservoir which maintains the water there at a pressure, P

_{res}Assume no viscosity of flow, until water exits the nozzle. Use the following notation:

A

_{noz}= cross sectional area of nozzle

L

_{hose}=length of hose

P

_{atm}=atmospheric pressure

ρ=density of water

What is the best expression for the velocity of the water just after it leaves the nozzle? (A)

What is the best expression for the height, h? (B)

**2. Homework Equations**

Bernoulli's equation, and conservation of energy (Initial kinetic energy of water=final potential energy of water at height, h)

**3. The Attempt at a Solution**

So, I actually was fine on the calculation of this problem, but I am having difficulty understanding the rationale behind (A). I calculated V

_{exit}= (2[(P

_{res}-P

_{atm})/ρ])^(1/2)

However, to do this, I ignored the velocity of the water in the reservoir. That makes sense, it is hardly moving compared to the velocity of the novel because the regions have equal flow rates. However, I also ignored the ρgh term for the water in the reservior. I guess that I am confused as to why this term doesn't have to be taken into account.

If anyone could explain, that would be great!

**1. Homework Statement**

**2. Homework Equations**

**3. The Attempt at a Solution**

**1. Homework Statement**

**2. Homework Equations**

**3. The Attempt at a Solution**