Calculate the change in temperature of a quantity of water that falls from the top to the bottom of the waterfall?

A waterfall is 1.260m high. Calculate the change in temperature of a quantity of water that falls from the top to the bottom of the waterfall. (Neglect heat losses to the surroundings, take g as 10m−² and specific heat capacity of water as 4200Jkg−¹K−¹)

A. 0.3°C
B. 3.0°C
C. 33.3°C
D. 42.0°C
E. 100.0°C

Correct Answer:

Option B – 3.0°C

Explanation

Δt=gh/c=(1260×10)/4200

= 3.0°