On his honeymoon,James Joule attempted to explore the relationships between various forms of energy by measuring the rise of temperature of water which had fallen down a waterfall on Mount Blanc.What maximum temperature rise would one expect for a waterfall with a vertical drop of 20 m? The specific heat of water is 4186 J/kg ∙ K.
A)0.047°C
B)0.053°C
C)0.064°C
D)0.071°C

Question

Quizplus · Accepted Answer

The potential energy lost by the water is converted into heat. Using the formula mgh = mcΔT, where h = 20 m, g = 9.8 m/s², and c = 4186 J/kg∙K, we find ΔT = gh/c = (9.8 * 20) / 4186 = 0.047°C.

On His Honeymoon,James Joule Attempted to Explore the Relationships Between