For reference, the Bernoulli equation is:

## Example 1

A reservoir contains an outlet that consists of a pipe that discharges water 50 ft below the top of the reservoir.

What is the velocity of the water exiting the pipe (at point B)?

### Solution

If you define elevation zero at point B:

- Point A has only potential energy
- Point B has only kinetic energy

The Bernoulli equation states that total energy must be the same, therefore:

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## Example 2

A pump is pumping water up a hillside into a reservoir. The pump rate is 4 ft/s (1.22 m/s) with a pressure of 100 psi (689 kPa). What is the maximum elevation of the reservoir that the pump can handle? (Water = 62.4 lbm/ft^{3} or 1000 kg/m^{3}).

### Solution

- The pump has both pressure and kinetic energy
- The reservoir has only potential energy

According to Bernoulli’s principle, the sum of the energy must be the same at both locations.

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