Physics
The difference between the temperature of water at the bottom and the top of a waterfall is 0.2 °C. Calculate the height of the waterfall. [g = 10 N kg-1, Specific heat capacity of water = 4200 J kg-1 °C-1]
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Answer
Let mass of water = m
Height of water fall = h
Change in temperature = Δt
Given that specific heat capacity of water (s)= 4200 J kg-1 °C-1 and g = 10 N kg-1
The potential energy of water at the top of the waterfall is converted into heat as the water falls.
∴ mgh = msΔt
10 h = 4200 x 0.2
h =
h = 84 m
Hence, height of water fall is 84 m.
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