The height of a waterfall is 84 metre . ...

The height of a waterfall is 84 metre . Assuming that the entire kinetic energy of falling water is converted into heat, the rise in temperature of the water will be (`g=9.8 m//s^(2),J=4.2` joule / cal)

`0.2^@C`

`1.960^@C`

`0.96^@C`

`0.0196^@C`

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