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Which water cool faster hot water in a black cup or hot water in a white cup?

Answer:

I think black, because black attract heat or light.

White, because black attracts heat.and white is stupider.



The water in the black cup will cool faster. A dull black surface generally is a better emitter and absorber of radiation compared to a shiny smooth surface of cup 2. This increases the amount of heat lost via radiation in the black cup to be greater, causing water in the white cup to be of higher temperature.
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