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Q.

If the height of Niagra fall is 50 m, the difference between the temperature of water at the top and the bottom of the fall is: (Assuming no loss in energy in other means)

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a

0.117 Co

b

117 C0

c

11.7 Co

d

1.17 Co

answer is D.

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Detailed Solution

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Assuming the gravitational potential energy gets completely converted into heat energy,  ms∆θ=mgh   ⇒   ∆θ=ghs=(9.81)(50)(4184)≈0.117 Co

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If the height of Niagra fall is 50 m, the difference between the temperature of water at the top and the bottom of the fall is: (Assuming no loss in energy in other means)