Water going down a waterfall, where is it warmer?

  • Thread starter aeromat
  • Start date
  • #1
114
0

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?
 

Answers and Replies

  • #2
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)
 
  • #3
114
0
But would you mind giving me a hint as to how I would go about with the calculations?
 

Related Threads on Water going down a waterfall, where is it warmer?

  • Last Post
Replies
1
Views
6K
  • Last Post
Replies
3
Views
5K
  • Last Post
Replies
4
Views
6K
  • Last Post
Replies
5
Views
10K
  • Last Post
Replies
2
Views
3K
  • Last Post
Replies
11
Views
506
Replies
2
Views
2K
Replies
17
Views
3K
Top