Water going down a waterfall, where is it warmer?

[aeromat]

Homework Statement

Consider a waterfall that is 120m high. How much warmer is the water at the bottom of the waterfall than at the top? The specific heat capacity of water is 4186J/ kg*°C.

Homework Equations

Conservation of Energy

The Attempt at a Solution

Eg [top] = Ek [just before the water hits the ground]
(m)(g)(h) = 1/2(m)(v)^2


I don't know how to compare the warmness of the top to the bottom, or how to get it calculation-wise. Does this have to do with:

E = (m)(c)(T)?
Where "E" is the heat energy?

 

[Moorebc]

It's a straightforward conservation of energy.

(1) Potential energy before the fall > (2) Kinetic energy just before it hits > (3) Thermal energy in the water.

You can go straight from (1) to (3)

 

[aeromat]

But would you mind giving me a hint as to how I would go about with the calculations?