1. The problem statement, all variables and given/known data 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 %. 2. Relevant equations The solution is: 1000 V 3. 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!