A waterfall is 630m high. What is 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 10 ms-2 and specific heat capacity of weather as 4200J kg-1K-1
A
0.015°C
B
1.50°C
C
15.00°C
D
21.00 °C
E
50.00°C
Verified Correct Answer: B.
Physical Principles & Numerical Solution
water height as 630m, gravity = 10m/s\(^2\), specific heat capacity of weather as 4200J
Temperature change = \(\frac{gh}{c}\) = \(\frac{630 \times 10}{4200}\)
= 1.5ºC
Source: Myschool Past Questions Archive (Record #42818)