# Physics

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On a certain dry sunny day, a swimming pool's temperature would rise by 1.60°C if not for evaporation. What fraction of the water must evaporate to carry away precisely enough heat to keep the temperature constant?
(Lv =2430kJ/kg or 580kcal/kg)

• Physics -

Q=Mc ΔT =mL(v)
m/M = c ΔT/L9v) =
=4183•1.6/2430000 = 0.00275
or 0.275%

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