Q.1 Water of mass 0.2kg at 20°C was added to water of mass 0.3kg at 75°C .
Calculate the temperature of the mixture.
Q.2 The heat capacity of a copper cup with a mass 0.5kg.
If 250kg of water at 5°C is added to the cup at 25°C , find the temperature of the water in the cup.
更新1:
sorry, I made the mistake : If 250g of water at 5°C is added to the cup at 25°C , find the temperature of the water in the cup.