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A water fall is 420m high. Calculate the difference in temperature of the water between ...

A water fall is 420m high. Calculate the difference in temperature of the water between the top and bottom of the water fall. Neglect heat loses(g = 10.0m-2 specific heat capacity of water = 4.20 x 10-3 JKg-1 K-1)
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  • A 0.1oC
  • B 1.0oC
  • C 42oC
  • D 100oC
  • E 4.20oC
Correct Answer: Option B
Explanation:
Potential Energy = Heat Energy
mgh = Mc\(\Delta \theta = \frac{gh}{c} = \frac{10 \times 240}{4.20 \times 10^3}\)
= 1.0oC

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