On his honeymoon, James Joule tested the conversion of mechanical energy into internal energy by measuring temperatures of falling water. If water at the top of a Swiss waterfall has a temperature of 10.0 degrees Celsius and then falls 50.0 m, what maximum temperature at the bottom could Joule expect?
change in internal energy = mgh
The Attempt at a Solution
I'm sure this question is easy I must be missing something, the change in internal energy is mgh but we have no mass?
The answer is (10.0 + 0.117) but I don't see how this was found.