Recent content by Maxee

Thank you. I've done as I've been told and got both values for Q negative (since I included multiplication with -23 for ΔT in both equations). Now, when I turn Qwater to positive and than add Qglass to it [Q = Q + (-Q)] I get a good result. Would you please explain me what am I doing wrong...

Homework Statement A water of mass 300g has been poured into a glass of mass 100g (of specific heat capacity 970Jkg-1°C-1) in a refrigerator. How much energy must be removed to cool the liquid and the glass from 30°C to 7°C? Homework Equations c = Q/mΔT The Attempt at a Solution mwater =...