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We pour 0.75 l of ice-cold water at and 0.25 l of hot water at into a heat-insulated container and wait for the temperature of the mixture to be steady. What is the final steady temperature of the mixture?
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and 0.25 l of hot water at 
into a heat-insulated container and wait for the temperature of the mixture to be steady. What is the final steady temperature of the mixture?
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