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Calculate the temperature change of water as it falls through a height of 20 m. (Take g = 10 N/kg and s.h.c of water =4200 J/kg/K)

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G.P.E = Heat again
Mwgh = MwCwΔθ
10 x 20 = 4200Δθ
Temperature change Δθ = 0.0476ºC
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