Question

Water from a waterfall drops down from h = 48 meters. How much does water's temperature rise, if all mechanical energy becomes internal energy?

Answer 1

I know that delta E = Q, however, I can't figure out how I could get the answer without any unknown values.

Answer 2

I'm not so good in english, but I think I could try to reply... If water drops down from h= 48 meters, water's energy must be E=mgh (mass, gravitational acceleration, height). So if all this energy becomes internal energy, that value must be equal to Q=mct (mass, specific heat capacity, temperature). So mgh=mct, gh=ct, t=gh/c. I think it's the good way to approach this problem but I'm not sure of its correctness(?).. Hope you'll understand.

Answer 3

Thank you very much!