Originally Posted by **Ugnius** I have problem to solve but have no clue where to start:
Water falls from height of 30 meters , 30% of waters kinetic energy turn into inner energy , how much water temperature will rise? Celcius |

That depends upon how many kilograms of water fall. If one kg of water falls 30 m, its kinetic energy increases by "mgh"= (1)(9.8)(30)= 294 joules. If 30% of that energy turns into "inner energy" then the energy of the water increases by 0.30(294)= 88.2 joules. How much will that increase the temperature of the water.