maddigrace3
29.04.2021 •
Physics
A student heated 20 Kg of water to a temperature of 80C. He then added an unknown mass of Kg of water at 15 C and the final steady temperature of the mixture is 40 C. Given that the specific heat capacity. of water is 4200J/kg degC, the unknown mass of 15C water is determined to be kg.
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Ответ:
The correct answer is most likely b) friction
Explanation: