Calculate Voltage: 1000V from 10 A, 100m Waterfall

[Physicsrapper]

Homework Statement

A Little power Station uses the water of a Creek. Per second 10 Liters of water fall from a height of 100 meters on the turbine of a power Station. A direct current I = 10 A ist produced. Find the voltage if the Efficiency of the electricity production is 100 %.

Homework Equations

The solution is: 1000 V

The Attempt at a Solution

10 l / s = 10 kg / s

v = J / C

C = 10 C/s

J = ?

How can I calculate the Joule?

Thanks in advance!

 

[SteamKing]

How much potential energy for each kilogram of water is there in a height differential of 100 meters?

 

[Physicsrapper]

I don't know at all the correct formula to calculate Joule...
Can you please help me?

 

[SteamKing]

Do you understand what potential energy is?